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    AD

1971 CL450 that sat for 40 years.

Much better (y)

I could have swore the bevel was facing the right way.. I bet there’s a way to put them in backwards and the bevel still look “correct”. Anyways, this takes a load off of my chest. May have found where the air was gettin in causing the high idle
 
I could have swore the bevel was facing the right way.. I bet there’s a way to put them in backwards and the bevel still look “correct”. Anyways, this takes a load off of my chest. May have found where the air was gettin in causing the high idle
If I don't see the difference I use a straight edge on the plate and shine a light from behind to reveal the taper, some are really subtle.
One of the carbs shows just a little light sneaking past so you might want to play with it to see if you can get it better. It should work fine as is
 
I’ll most likely attempt to swap out the throttle cable tonight before I do another test run. Anything special about that cable? Ill be able to figure out routing, and setting the cable for both carbs to open at the same time. I’ve never worked on anything in regards to the handlebars. Do I unscrew the kill switch box?
 
I’ll most likely attempt to swap out the throttle cable tonight before I do another test run. Anything special about that cable? Ill be able to figure out routing, and setting the cable for both carbs to open at the same time. I’ve never worked on anything in regards to the handlebars. Do I unscrew the kill switch box?
Yes, the right handlebar switch assembly has to be opened to remove the old cable and install the new one. There are 3 points of inner cable slack adjustments, the obvious ones are at each carb where the cables attach to the little brackets. You use those to sync the carbs to both open at the same time. The cable adjuster at the elbow coming out of the right switch assembly is the main slack adjustment, you want that one screwed in all the way (most slack) until you get the carbs synced at the cable adjusters on each one. The 3rd and least obvious of the 3 adjustment spots isn't really intended to be for an adjustment, but it can be used if you still have some slack in the typical aftermarket cable. That 'adjustment' is based on how far into the lower half of the right switch assembly you screw the cable elbow. You want to leave yourself enough threads exposed on the threaded elbow for the lock nut, but if you have excess slack you can always take the screws out of the right switch and unscrew the elbow a turn or two to reduce slack as well.

Be careful once you have the screws out of the switch assembly, the wires connected to the switches inside the unit can be somewhat fragile.
 
Yes, the right handlebar switch assembly has to be opened to remove the old cable and install the new one. There are 3 points of inner cable slack adjustments, the obvious ones are at each carb where the cables attach to the little brackets. You use those to sync the carbs to both open at the same time. The cable adjuster at the elbow coming out of the right switch assembly is the main slack adjustment, you want that one screwed in all the way (most slack) until you get the carbs synced at the cable adjusters on each one. The 3rd and least obvious of the 3 adjustment spots isn't really intended to be for an adjustment, but it can be used if you still have some slack in the typical aftermarket cable. That 'adjustment' is based on how far into the lower half of the right switch assembly you screw the cable elbow. You want to leave yourself enough threads exposed on the threaded elbow for the lock nut, but if you have excess slack you can always take the screws out of the right switch and unscrew the elbow a turn or two to reduce slack as well.

Be careful once you have the screws out of the switch assembly, the wires connected to the switches inside the unit can be somewhat fragile.
Roger that.. Also my right switch box isn’t up to par as far as the controls go. The killswitch is extremely sensitive. And the headlight switch is very stiff feeling. I didn’t know if there would be a way to clean the insides, or get it working smoother.

Also, will I need specific cable lube? I have generic oil around the house. 3in1, Wd40, etc
 
I'd suggest replacing the right switch, the aftermarket units aren't bad but the actual replacement requires running the wires inside the handlebars which, for someone who's never done it before, can be challenging. As for the new cable, there will be many here who will feel differently but I've never lubed a new cable. They usually work really smooth and I've always had good success leaving a new cable as is. Down the road a few years if/when the cable starts to feel a little stiff or tight, then some lube usually helps. As to the internal components, the mechanical parts of them could probably use a little light grease. Jim did a write-up on handlebar switches, you'll get a view of some of the internal parts from it as the 350 and 450 switches are very similar.

 
New issue found with right carb. It is not passing the straw test. The slide is sticking after all. A test was suggested by 66Sprint over the phone. Also, it was recently brought up by forum member Jensen. I was confident in my sanding and polishing of the slide previously… Time to get back to scrubbing.
 
New issue found with right carb. It is not passing the straw test. The slide is sticking after all. A test was suggested by 66Sprint over the phone. Also, it was recently brought up by forum member Jensen. I was confident in my sanding and polishing of the slide previously… Time to get back to scrubbing.
Instead of sanding everything try putting vertical lines on the inside of the cap where the piston slides using a Sharpie. Put an index marking to know where the piston and cap are positioned so you can repeat the test.
Slide the piston in and out a few times and inspect. Anywhere the lines have rubbed off is suspect.
Now makes lines on the piston and rotate the piston in the cap a few times. Inspect.
If no lines are worn off the the issue is in the damping slide in the center and not the piston to cap clearance.
 
Instead of sanding everything try putting vertical lines on the inside of the cap where the piston slides using a Sharpie. Put an index marking to know where the piston and cap are positioned so you can repeat the test.
Slide the piston in and out a few times and inspect. Anywhere the lines have rubbed off is suspect.
Now makes lines on the piston and rotate the piston in the cap a few times. Inspect.
If no lines are worn off the the issue is in the damping slide in the center and not the piston to cap clearance.
That’s a great test. Think I found my 1st suspect.

A30F9D07-CF5D-48C2-A835-1AE17F30EBE4.jpeg
 
Did a few more sharpie tests, and a LOT of polishing with #0000 steel wool. Still unable to perform the straw test. The slide moves freely if you tilt the carb sideways, or upside down. Gonna try some more tests tomorrow, and do some more polishing.

(I know pics would have helped but I thought about that after putting the carb top back on and headed to bed)
 
Just a little update:

I was able to polish the bore of the slide enough, to pass the straw test. I also got the new throttle cable installed, but haven’t got the carbs back on yet to make any adjustments. I have been in the process of ordering small parts that are missing on the bike. I have ordered a set of reflectors for the forks, cable stays for the front fender, and rubber for the kickstart.

I have a question about the high beam indicator on the headlight bucket. I have found one and it’s on the way. My bucket has the indent where the indicator should go, but it hasn’t been “popped” out yet. Would this be as simple as cutting or drilling that hole out? Did the CL450’s come with that hole already popped out?

26854CC7-FDDD-4454-8AA3-DDD106481E5B.png
C90FAE4B-2C95-40DC-B1E8-A6729B3DEA20.jpeg
EEF9533D-4AEC-4248-91D1-AD9FEE33A8F8.png
 
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That headlight case has been fiberglassed over the hole, you can see the look of it on the inside. That hole was open on all CBs and CLs that year. the center indicator light group didn't come out until later. If only this bike could talk, I'm convinced it would have tales of unusual modifications and piracy.
 
That headlight case has been fiberglassed over the hole, you can see the look of it on the inside. That hole was open on all CBs and CLs that year. the center indicator light group didn't come out until later. If only this bike could talk, I'm convinced it would have tales of unusual modifications and piracy.

There is a surprise under every part of this bike lol. I try to make sense of it, but my head starts to hurt. Only logical explanation I can think of would be that the fiberglass was used to repair a crack. If that’s the case, then maybe that explains the CB750 top bridge and different forks. Maybe this is all leading up to that the front end was damaged in a wreck.
 
There is a surprise under every part of this bike lol. I try to make sense of it, but my head starts to hurt. Only logical explanation I can think of would be that the fiberglass was used to repair a crack. If that’s the case, then maybe that explains the CB750 top bridge and different forks. Maybe this is all leading up to that the front end was damaged in a wreck.
Pretty cool. Nice job, that's a keeper.
Maybe it was crashed, but if it's now made right, it's right and if not, you'll make it right and we'll help. Kudos for all that you've done so far.
 
Pretty cool. Nice job, that's a keeper.
Maybe it was crashed, but if it's now made right, it's right and if not, you'll make it right and we'll help. Kudos for all that you've done so far.

I appreciate that. Very thankful for everyone here. I actually got to talking with a well known automotive painter in my area. It’s towards the end of the list on this bike, but I’ll be dropping off the parts to his shop, plus two quarts of Candy Topaz Orange, one quart basecoat and one quart midcoat. ($230 a quart from VMR). Can’t wait for the day to get that done. Not sure yet how to go about doing the black ‘batwing’ on the tank. On eBay there’s a seller who has decals for $150, that seems like too much. Found another decal set from kz900.com for $79. Definitely want it to turn out correct.
 
Free spinning screw on intake valve cover:

I noticed a very tiny oil leak coming from under this screw/area. When I tried to loosen then tighten the screw, it’s free spinning.

Hopefully I am not guilty of overtightening, and that this threaded hole was on its last leg from previous abuse.

Edit: Now that I remember, there were three different lengths/styles of bolts screwed into this cover when I first opened it.


Any ideas on how to fix this? Thanks a lot.

1F2FB6AA-0EA9-46E5-91AB-7310891AC242.jpeg
 
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It's one reason I don't care for allen heads, you can put a lot more on them than the thread size can handle in many cases. While you may have taken different length bolts out of the cover, in truth there's only one bolt (exhaust valve cover, upper left bolt) that is slightly longer and only because the points wire guide tab is on it. I've gotten away with using slightly longer bolts in heads where the threads were weak in some valve cover bolt holes. Take a small diameter rod, like a coat hanger, and check the thread depth with it, then compare that length to the bolt length you take out of that hole. You can usually go a few threads longer and if so, and you carefully tighten it with a bolt just a bit longer, it should work. They don't typically come loose except for a little bit of gasket crush when new.

If this is your latest frustration, it's about 2/10. A lot worse things could be happening... :)
 
It's one reason I don't care for allen heads, you can put a lot more on them than the thread size can handle in many cases. While you may have taken different length bolts out of the cover, in truth there's only one bolt (exhaust valve cover, upper left bolt) that is slightly longer and only because the points wire guide tab is on it. I've gotten away with using slightly longer bolts in heads where the threads were weak in some valve cover bolt holes. Take a small diameter rod, like a coat hanger, and check the thread depth with it, then compare that length to the bolt length you take out of that hole. You can usually go a few threads longer and if so, and you carefully tighten it with a bolt just a bit longer, it should work. They don't typically come loose except for a little bit of gasket crush when new.

If this is your latest frustration, it's about 2/10. A lot worse things could be happening... :)

Thanks for the advice. Hopefully I’ve made it past the 10/10 frustrations. *Knocks on wood*. I have a mechanic friend who mentioned he could chase the threads, and it would be an easy fix for him.

Different topic:

Here’s some pictures of my lower bridge. I know the top one has been identified from a CB750. Am I missing a screw here?


8469D1F6-EC8E-4B37-A1CF-6AC87970523D.jpeg
DB7BD82D-8BE0-4378-9881-B5CC262D2BAB.jpeg
 
I have a mechanic friend who mentioned he could chase the threads, and it would be an easy fix for him.
I wouldn't bother, just use air pressure to blow loose pieces out of the hole if there are any. 'Chasing' threads in a weak bolt hole can sometimes remove material unnecessarily and weaken what is left. I'm assuming some threads came out on the bolt when you removed it. You just want to reach the better threads below the length of the bolt that was in it.
Here’s some pictures of my lower bridge. I know the top one has been identified from a CB750. Am I missing a screw here?
No, that steering stem was used when some bikes still came with steering dampers and that is a mount hole for one (or possibly for Police equipment) but you and I won't use it.
 
One last thing for the night:

I am still having trouble installing the bottom frame bolt for the exhaust pipes. I loosened all of the bolts, and it’s still way off.

I did observe that the top hanger bolt is bent, I bet that’s causing the issue.

Also, this may be unnecessary, but I took a picture down both exhaust pipes top and bottom. The bottom one has an object that’s close, the top one is clear. I don’t know much about the internals, just seeing if it’s normal in there.

Slanted top of the exhaust:

CF5C27F7-5506-47E0-8AB2-8FB9BB8406BF.jpeg


Top:
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Bottom:
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Update:

I have currently hit a wall with getting the carbs properly tuned, and the air/fuel mix correct. I have been working on this the past few days. I have learned that this is a science all by itself. I have spoken with 66Sprint about some of the problems I'm having.

Carbs: 14H x 2

From my understanding, the procedure is as followed from 66Sprint.

Prep: Place a fan in front of the bike so that it stays cool, and to trick the engine that its being driven. Make sure float bowls are set to 20mm height, and that the carbs open at the exact same time using the throttle cable, or else you are wasting your time.

Set fuel mixture screws to 3/4 turns out.

Set idle to 1200rpm using the idle screws.

Turn fuel mixture screws until highest RPM is reached. This could possibly be a 1/8th or 1/4 turn either way.

Turn idle screws to counteract the raised RPM, back to 1200. This could take 3-4+ attempts on both carbs.

Problems:

I will start with the choke on, and the idle screws barely touching the arm. I will turn the throttle to where its barely open and hit the starter button.
The bike will fire right up, and ill quickly turn the choke off. I'll hold the throttle at a steady 1200rpm while I lean down and tighten both idle screws until the screws hit the arm again. I'll let off the throttle and the idle will stay where I want it to be.
The first part is always successful, here comes the problems.
I'll let the bike idle for about 5-10 mins to let the engine warm up, and observe how it behaves. It takes a lot longer for the left cylinder exhaust to get hot. The right cylinder gets very hot immediately.
After about 10 mins of idling, the idle will have slowly traveled back down to 800rpm's. I'll turn the throttle to 1200rpm's, and tighten the idle screws further to compensate. At this point, the exhaust gets very sputtery, and backfires. The left exhaust will finally be very hot like the right one.
Then ill move on to step 2 and start slowly turning the mixture screws, but heres the problem, I never notice an effect on the engine. I'll turn the mixture screws a 1/4 turn to the left, or right, and no effect takes place. ill wait a minute or two in between adjustments. I'll even turn the screws a half turn either way, and still nothing happens. The engine continues to sputter and emit gray/white smoke. I'll wait a little while, and then the idle will have dropped again to about 900rpm. My dad was over here today helping me with the adjustments(about 2 hours) and he was a bit lost of words, even though he usually has an answer. I remember Steve mentioning the felt seals on the throttle shafts, how they can cause air leaks when not lubed with 90w gear oil. I suppose I will buy some starter fluid and spray in that area with the engine running. Appreciate anyone who gives this a read or had similar problems!
 
Update:

I have currently hit a wall with getting the carbs properly tuned, and the air/fuel mix correct. I have been working on this the past few days. I have learned that this is a science all by itself. I have spoken with 66Sprint about some of the problems I'm having.

Carbs: 14H x 2

From my understanding, the procedure is as followed from 66Sprint.

Prep: Place a fan in front of the bike so that it stays cool, and to trick the engine that its being driven. Make sure float bowls are set to 20mm height, and that the carbs open at the exact same time using the throttle cable, or else you are wasting your time.

Set fuel mixture screws to 3/4 turns out.

Set idle to 1200rpm using the idle screws.

Turn fuel mixture screws until highest RPM is reached. This could possibly be a 1/8th or 1/4 turn either way.

Turn idle screws to counteract the raised RPM, back to 1200. This could take 3-4+ attempts on both carbs.

Problems:

I will start with the choke on, and the idle screws barely touching the arm. I will turn the throttle to where its barely open and hit the starter button.
The bike will fire right up, and ill quickly turn the choke off. I'll hold the throttle at a steady 1200rpm while I lean down and tighten both idle screws until the screws hit the arm again. I'll let off the throttle and the idle will stay where I want it to be.
The first part is always successful, here comes the problems.
I'll let the bike idle for about 5-10 mins to let the engine warm up, and observe how it behaves. It takes a lot longer for the left cylinder exhaust to get hot. The right cylinder gets very hot immediately.
After about 10 mins of idling, the idle will have slowly traveled back down to 800rpm's. I'll turn the throttle to 1200rpm's, and tighten the idle screws further to compensate. At this point, the exhaust gets very sputtery, and backfires. The left exhaust will finally be very hot like the right one.
Then ill move on to step 2 and start slowly turning the mixture screws, but heres the problem, I never notice an effect on the engine. I'll turn the mixture screws a 1/4 turn to the left, or right, and no effect takes place. ill wait a minute or two in between adjustments. I'll even turn the screws a half turn either way, and still nothing happens. The engine continues to sputter and emit gray/white smoke. I'll wait a little while, and then the idle will have dropped again to about 900rpm. My dad was over here today helping me with the adjustments(about 2 hours) and he was a bit lost of words, even though he usually has an answer. I remember Steve mentioning the felt seals on the throttle shafts, how they can cause air leaks when not lubed with 90w gear oil. I suppose I will buy some starter fluid and spray in that area with the engine running. Appreciate anyone who gives this a read or had similar problems!
I'm concerned about the left not heating as fast. I would suspect an ignition gremlin if the carb idle circuit is working perfect. I would use a strobe timing light to see if both sides are firing at proper, even and consistent advance. Also try another set of plugs (there are badish plugs out there) and the caps too, try switching them and trimming a 1/4" off the plug wires to get good contact for the cap screws.
I wouldn't worry, at this point about mixture screws, just leave them at the recommended setting. If the engine is puttering and smoking, that adjustment isn't going to do much, there are other issues.
Turn the lights down low and look at the points spark. It's supposed to be tiny and it is hard to see in bright light.
 
I'm concerned about the left not heating as fast. I would suspect an ignition gremlin if the carb idle circuit is working perfect. I would use a strobe timing light to see if both sides are firing at proper, even and consistent advance. Also try another set of plugs (there are badish plugs out there) and the caps too, try switching them and trimming a 1/4" off the plug wires to get good contact for the cap screws.
I wouldn't worry, at this point about mixture screws, just leave them at the recommended setting. If the engine is puttering and smoking, that adjustment isn't going to do much, there are other issues.
Turn the lights down low and look at the points spark. It's supposed to be tiny and it is hard to see in bright light.

Thank you for the advice, all is definitely considered.

Dynamic timing:

I have never used a strobe light before, I’m not sure where I’d begin. I would very much enjoy a link to a write-up on how to perform a strobe light test. Also, I’m pretty sure my points are original and maybe replacing them would help if they are worn down.
I remember Tom posting the correct gap measurement but I would have to dig back and find it. I will also check for tiny sparks under the points cover while the bike is running I assume?

Plugs/wires:

The plugs, caps, and wires are brand new. I can still trim them down though. I replaced the plugs today to see if anything improved and it didn’t. The plugs I pulled were shiny and black. Those were put in a month ago. I have non-resistor spark plugs and resistor boots.
 
Thank you for the advice, all is definitely considered.

Dynamic timing:

I have never used a strobe light before, I’m not sure where I’d begin. I would very much enjoy a link to a write-up on how to perform a strobe light test. Also, I’m pretty sure my points are original and maybe replacing them would help if they are worn down.
I remember Tom posting the correct gap measurement but I would have to dig back and find it. I will also check for tiny sparks under the points cover while the bike is running I assume?

Plugs/wires:

The plugs, caps, and wires are brand new. I can still trim them down though. I replaced the plugs today to see if anything improved and it didn’t. The plugs I pulled were shiny and black. Those were put in a month ago. I have non-resistor spark plugs and resistor boots.
Strobes are fairly cheap on amazon, are easy to use but do make a mess because you have to run the bike with the stator cover off and oil sprays out some.
They are useful because our older advance units with old springs and other wear factors can cause a difference between just a static timing setting and what is going on in real running conditions. You can see if it's running near the 'F' mark at idle and then watch as it advances up as rpm's are increased, also when and where the max advance marks are reached.
I only use the static to get it running then final adjustment is dialed in via the strobe on all my old bikes.
If you have stuttering and sputtering and smoke, you've got other issues that are more fundamental than 'fine tuning' with exact mixture or dynamic timing. Yeah, a strobe will show if you are way off, like 10 degrees or more at idle, which could contribute to it's bad behavior, plus you can compare one side against the other by switching the induction pickup clip from the strobe from each spark plug lead.
 
Strobes are fairly cheap on amazon, are easy to use but do make a mess because you have to run the bike with the stator cover off and oil sprays out some.
They are useful because our older advance units with old springs and other wear factors can cause a difference between just a static timing setting and what is going on in real running conditions. You can see if it's running near the 'F' mark at idle and then watch as it advances up as rpm's are increased, also when and where the max advance marks are reached.
I only use the static to get it running then final adjustment is dialed in via the strobe on all my old bikes.
If you have stuttering and sputtering and smoke, you've got other issues that are more fundamental than 'fine tuning' with exact mixture or dynamic timing. Yeah, a strobe will show if you are way off, like 10 degrees or more at idle, which could contribute to it's bad behavior, plus you can compare one side against the other by switching the induction pickup clip from the strobe from each spark plug lead.
I will definitely look to order a strobe light off of Amazon! I am open to recommendations.

I am also genuinely interested in learning the proper procedure.
 
Nice, if it matches your bike. AD would know best if that will work. I'm not a 450 guy, so I don't know all the little details of compatability.
 
I will definitely look to order a strobe light off of Amazon! I am open to recommendations.

I am also genuinely interested in learning the proper procedure.
I still use my old Craftsman from the 70's. They are all pretty similar and used to run around $40 on amazon. Expensive ones are not needed, just maybe more durable.
They all have leads to connect to a 12volt power source (your bike battery is fine) and a clip on induction clamp that reads the pulse through the spark plug wire sheath. You just point it at your spinning stator rotor and it flashes when it fires to see what degrees it's firing at.

RYg4Cril.jpg


See the double hash marks? They are about 45-48 degrees before TDC. The F mark is 5 BTDC. Same on yours except more marks for right and left side.
 
Manual (or fixed) is fine for bikes because it's easy to see the whole rotor. Cars, etc. are a pain because you sometimes have to look through a tiny window in a cover to set it, or there is only one mark so you have to preset the advance on the light to see the mark at a given rpm. No advantage on a bike.
Glad to see they are still around $30.
 
I wish I had a go-pro to strap to my chest and make a 20 min video on what’s going on, but here’s a short snippet on what happens when I get the idle screws equal at 1200rpm. Sputtering, smoke, then eventually the rpm drops to 800. Left pipe warm(but heating up), right pipe hot.

 
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Yep, not right. They both get hot when both are firing. Hard to fix carb stuff when not firing and vice versa for that matter. A strobe is a good investment and may help to get you firing better. If the strobe don't flash then you got a problem upstream from the pickup, points, condenser, coil. Even if flashing intermittently, you know you got a problem.
You'll get 450 music instead of smoke soon. AD's a great diagnoser on these.
 
Yep, not right. They both get hot when both are firing. Hard to fix carb stuff when not firing and vice versa for that matter. A strobe is a good investment and may help to get you firing better. If the strobe don't flash then you got a problem upstream from the pickup, points, condenser, coil. Even if flashing intermittently, you know you got a problem.
You'll get 450 music instead of smoke soon. AD's a great diagnoser on these.

Steve on the phone described the 450 engine properly adjusted as an “in-tune beehive”, hopefully I won’t have to invest in a beekeepers suit off of Amazon lol
 
I would like to add that before I knew of AD’s recommendation for PJ-1 Chain lube on the points felt, I did a couple drops of 3in1 oil.

I’ve got a strobe light and pj1 chain lube on the way
 
I am having a hard time mentally ordering that strobe light off of Amazon. Lots of complaints of it being cheaply made and flimsy. May look for an alternative. eBay has vintage sears craftsman lights lol.

Edit: Found one at harbor freight with better reviews.
 
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I've had my Sears light for 40 years. It still works. Cars don't need them anymore so if I didn't have these old bikes around I'd sell it on Ebay, too.
 
Also, there's a very small jet that is inside the tube that carries air from the mouth of the carb to the idle circuit and it often gets plugged up with dust and stuff. You can poke it clean with a very thin guitar string or an acupuncture needle. You can see it in the brass tube this photo that I copied from another thread.

1701677986942.png
 
I do have a points plate I snagged from CMC for $20, on sale from $85.
I also bought one of those but mainly for the wires, grommet and felt. I did a dry fit into the points base and the fit was very sloppy. You may have issues getting the timing correct on both cylinders. Also there is a crusty coating on the point surfaces that will need to be cleaned if you decide to use the points.
 
I also bought one of those but mainly for the wires, grommet and felt. I did a dry fit into the points base and the fit was very sloppy. You may have issues getting the timing correct on both cylinders. Also there is a crusty coating on the point surfaces that will need to be cleaned if you decide to use the points.

I’ll definitely check the points gap on my current setup and use the points off of the new one if need be
 
I am also genuinely interested in learning the proper procedure.
While this is not the perfect video, it is an example of how to do it by a young man who joined VHT over a year ago and basically learned from scratch right here at VHT. He'd never touched a timing light and did not own one until he started learning how to take care of his 360. BTW, the 350, 360 and DOHC 450 ignition timing all work the same way.

 
Just a footnote - if you decide to use a strobe timing light put a good size piece of cardboard on the floor, wear clothes that can get oily, and put a piece of 1/2" plywood or similar material under the left side leg of the center stand so the bike leans a bit away from the open cover. I end up with oil spots on my glasses every time I do this.
 
Just a footnote - if you decide to use a strobe timing light put a good size piece of cardboard on the floor, wear clothes that can get oily, and put a piece of 1/2" plywood or similar material under the left side leg of the center stand so the bike leans a bit away from the open cover. I end up with oil spots on my glasses every time I do this.

Thanks for the heads up, I have seen people use an extra stator cover with a hole cut in it. Hopefully I won’t have to spend too much time with this procedure
 
Thanks for the heads up, I have seen people use an extra stator cover with a hole cut in it. Hopefully I won’t have to spend too much time with this procedure
If your advancer is working properly and your static timing is correct, then it can often be as simple as checking the full advance marks and you're done. But... your bike has been a bit cranky with a few things so I'd guess this may well be more of an effort than that. No matter, it needs to be done and once you verify the timing is correct on both sides then the carbs should be easier to dial in. Of course, that also implies that the carbs are fully clean, which you've yet to completely verify. I know this is probably frustrating to you, but this is a fairly typical example of what happens when one of these bikes gets badly neglected over a long time and needs a ton of catch-up maintenance.
 
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If your advancer is working properly and your static timing is correct, then it can often be as simple as checking the full advance marks and you're done. But... your bike has been a bit cranky with a few things so I'd guess this may well be more of an effort than that. No matter, it needs to be done and once you verify the timing is correct on both sides then the carbs should be easier to dial in. Of course, that also implies that the carbs are fully clean, which you've yet to completely verify. I know this is probably frustrating to you, but this is a fairly typical example of what happens when one of these bikes gets badly neglected over a long time and needs a ton of catch-up maintenance.

I have spent a lot of time on the carbs, getting them as clean as possible. Both bodies have spent at least 45 mins in an ultrasonic cleaner. After that, I used carb cleaner in every nook, cranny, and passage. Followed up by blowing out with an air compressor. I took every jet and made sure those passages were clear as well. The only piece that I couldn’t save, was the emulsifier tube in the right carb. I believe its the tube that’s under the slow jet. The “head” of it had previously been chipped off from someone trying to unscrew it. I believe that’s my only aftermarket piece. There may be an original piece in the 723A carb that I could pull out and swap it with. I actually did not check the jet that westwent pointed out, at the rear of the carb. I overlooked that one.

Edit: I’ll most likely be disassembling the throttle shafts on both carbs soon, to access the felts and get a drop of heavy oil on them. Would it be logical to replace those as well?
 
I have spent a lot of time on the carbs, getting them as clean as possible. Both bodies have spent at least 45 mins in an ultrasonic cleaner. After that, I used carb cleaner in every nook, cranny, and passage. Followed up by blowing out with an air compressor. I took every jet and made sure those passages were clear as well. The only piece that I couldn’t save, was the emulsifier tube in the right carb. I believe its the tube that’s under the slow jet. The “head” of it had previously been chipped off from someone trying to unscrew it. I believe that’s my only aftermarket piece. There may be an original piece in the 723A carb that I could pull out and swap it with. I actually did not check the jet that westwent pointed out, at the rear of the carb. I overlooked that one.

Edit: I’ll most likely be disassembling the throttle shafts on both carbs soon, to access the felts and get a drop of heavy oil on them. Would it be logical to replace those as well?
The holes on the replacement emulsion tube have to be exactly the same position and size as the originals
The felts are dust seals, adding oil isn't a bad idea. Replacing them to solve a problem is a waste of time and effort.
 
The felts are dust seals, adding oil isn't a bad idea. Replacing them to solve a problem is a waste of time and effort.
I have seen Jim say this twice recently but have been led to believe by numerous posts over the last decade that dried up felts on the throttle shafts can contribute to high idle issues on original carbs. I have certainly pulled dried up, crumbly felts from some old carbs. So is this really not an issue and is instead a long perpetuated myth?
Personally I have found my own replacement solution for the old felts and routinely replace them when rebuilding carbs. I feel I have had more reliable results overall since doing so. Maybe I have just gotten better and more thorough rebuilding carbs as time has moved along, I dunno? I would agree that attempting to replace them requires careful work and attention to details (like orienting the plate bevels and use of correct driver and loc-tite on tiny JIS screws) so one must be diligent with their work on this. But speaking generally of complete carb rebuilds, it is truly unnecessary and a complete waste of time to replace the felt material?
In the context of Danager4792 and his troubles I would agree that adding a drop or two of oil to the throttle shafts where they enter each carb would not hurt and would be a simple and easy way to eliminate dried up felts from his list of possible problems so he could continue moving forward. Perhaps this was Jim’s point all along, if so forgive me, but I was also interested in some clarification of this long held belief for myself.
 
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