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1971 CL450 that sat for 40 years.

I just got off of the phone with the owner's son, who made all of the repairs and maintained the bike. At first I was talking to the granddaugher, who made the claims that multiple family members had worked on the bike. The son clarified that she was referring to a 360 Benelli that was tossed around the family, and that he wouldn't dare touch it since it had been through so many hands.

This is going to be a difficult repair list to compile. Bear with me on the order of events and how they took place. This granted me a lot of closure and knowledge on the history of the bike.

According to the son:

-His father acquired the bike in 1977 from his Uncle who had it momentarily.
-The last known healthy running year for the bike was 1986. It rode many miles to Canada back and forth in its previous years. (They live in Michigan).
-The son, in a period of desperation, tried to get the bike to idle and putt around the backyard in 2020 for his Dad to sit on and enjoy right before his Dad passed.
-When the Uncle received the bike in 1976, it had the '72 and after fork setup on it.


Repairs/History:

Color/Cosmetics
-The bike was originally Candy Topaz Orange, as I noticed seeing under one of the side covers. The Uncle painted the bike sky blue and it was definitely not Strato Blue Metallic according to the son. This can be seen from chips under the fuel tank.
-The Dad did not like the color, so the son grabbed what was on the shelf in his garage. The color is a paint combo of Crimson Red, Brandy Wine, and a hint of black paint.
-He has no idea why the engine crankcase covers are black. They weren't that color when he sold it a few years ago.
-The front and rear fender both had a crack on them near the ends, so they chopped off 2in of the fenders on both the front and rear.

Front of bike
-The CB front fender came on the bike when his Uncle got it.
-He warned me that I'm missing the gauge brackets under the gauges, and thats why they are so far apart.
-One of his family members tipped over the bike and cracked the triple tree, so his friend offered to replace it with one from a CB750.
-The front headlight bucket is from a 73-74 CB350.
-The bucket was missing the high beam indicator and there was a hole, so he covered it up with fiberglass.
-I didnt really get this, but he said the front fork ears are made from two sets of CB350 fork ears, so they end up being 2in longer than original. They will most likely fall apart when I take them off.
-Steering bearings are original, he regreased them.
-Odometer and tach gauges were replaced because of damage. They suspected the front end was previously in a wreck when the Uncle received the bike.
-The right throttle side controls are from a CB350

Wheels
-They have never been touched or opened up. Bearings and drum brakes will need attention.

Exhaust/Muffler
-The baffle(s) broke loose, so they cut open the mufflers and tried to secure the baffles with the three screws in the top, then welded it back together.

Tires
-The back tire came off of a Harley Sportster

Chain
-An o-ring chain was put on the bike since a nephew of his was going to use the bike for off-roading, but then changed his mind.

Clutch/Transmission
-The son couldn't figure out for his life why the transmission was acting up, spent weeks on it, so they pulled a transmission from another CL450 motor and it fixed everything.
-He installed new transmission bearings.
-He Installed new clutch plates
-Even though he read the FSM a lot, he couldn't understand the clutch cable setup. He did it the "Harley way" and it rode fine.
His definition - Unscrew the cable adjuster nut all the way. Go to the clutch lever adjustment. Turn it left and then barely turn it right until it touches. Tighten cable nut.

Rear brake light
-When they received the bike from the Uncle, the bike didn't have rear turn signals, so the father drilled holes in the rear bracket to mount turn signals through there.

Engine
-He says he came home one day, and for whatever unknown reason, the engine was completely disassembled and in pieces in the garage. He never got a straight answer of why his father did this.
-His father momentarily had a different CL450 engine in the bike while the other one was in pieces.
-The son said that he got fed up and wanted to rebuild the original engine. He installed new OEM pistons and rings to OEM spec.
-The original engine went back into the bike.


He then asked me about the wiring and if I noticed anything, while laughing. He apologized for the hacked wiring. He couldn’t acquire a glass fuse so he rigged up a blade fuse. He also apologized for the cracked cam bearing on the points side. He grabbed one from his spare parts bin. He said the bike hadn't ran in 20+ years and he at least wanted it to idle so he could see his Dad sit on it one last time before he passed. That's also why there is an upside down clutch lever for the brake lever. He said he had to make things do for the time he had.

He says somewhere there is a basket of parts he would like to send to me that came off of the bike. And he is very excited to see the bike's progression for his father's memory.

Oh and here's the killer part. He could never get the bike to idle correctly and that's why he sold it. He said he cussed for months and years. I asked him if he knew he had two different carbs on there with two different fuel mixture screws(14H & 723A). He was dumbfounded and said that explains everything.

I cranked the bike up over the phone and he was speechless, said he never dreamed of it sounding that good.

He was generally mad at the story I was told. Explaining that it was just someone trying to sell me something, or the story got twisted. He was flabbergasted that his previous Michigan bike made it all the way down to Memphis TN. Sounds like I’ll need to edit my #1 post on this thread
Wow... quite the story, and it explains a lot of the stuff we've wondered about. And what a concocted story about the bike sitting at a shop for 20 years. POs can be frustrating, ridiculous, annoying and lots of other things, but this story has a little bit of all of it. Including mysteries, like in many of those mentioned instances - "Why??"
 
Wow... quite the story, and it explains a lot of the stuff we've wondered about. And what a concocted story about the bike sitting at a shop for 20 years. POs can be frustrating, ridiculous, annoying and lots of other things, but this story has a little bit of all of it. Including mysteries, like in many of those mentioned instances - "Why??"

At least there won’t be many surprises anymore, and if so, there will be an explanation. It felt great to finally hear the bikes story. Little confused about the four-piece fork ears he’s talking about, but I’ll be finding out when they come off.
 
So many stories! Mostly what you see is what you get. I've had a couple of complete junk finds that I fell for, but mostly the signs of real abuse are sort of obvious. The sneaky one that has caught me is something that's been run without lubrication somewhere. With bikes it's the engine, with scooters it can be the rear reduction gears.
 
Seeing that the wheels on this bike have never been serviced, I have been trying to source a nice pair of front and rear drum brake shoes.

4into1 is sold out of its most popular options, but has a few left. Can't find front shoes there.

Vesrah rear brake shoes w/ springs $28.57

CMC has it's options, but would like to consider others.

Drum brake shoes (front) $45
Drum brake shoes w/springs (rear) $45



There are some dirt cheap grooved options, but don't know what quality that would be.
 
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Don't forget DavidSilverSpares. Sometimes they have stuff no one else does and better prices but you need part numbers to do a thorough search.

I just looked, they have a pair for rear at $22 aftermarket. No fronts listed by 71 model. Didn't check by number though.

 
Don't forget DavidSilverSpares. Sometimes they have stuff no one else does and better prices but you need part numbers to do a thorough search.

I just looked, they have a pair for rear at $22 aftermarket. No fronts listed by 71 model. Didn't check by number though.


Looks like they do have an aftermarket front set. I’ve never bought anything overseas or from the UK though. The list price is 60 pounds and 86 ounces

 
Looks like they do have an aftermarket front set. I’ve never bought anything overseas or from the UK though. The list price is 60 pounds and 86 ounces

That's great, must have missed seeing them or listed by part number only.

They have a US warehouse in PA. Sometimes they have to transfer from the UK first, so it takes a little longer but they don't charge extra for that.
 
Other than a set of rear shoes from Vesrah that I bought for my 450 early on and they were not arced well at all (horrible stopping power), I've always had good luck with Vesrah shoes and engine gaskets. Worst case scenario you have to spend some time arcing them to the drum, but they're good quality.
 
I have a few questions in regards to the front end and gauges on the bike. The original owner's son contacted me and said he believes the top bridge came off of a CB550, instead of a CB750. I know compatibility can get confusing when throwing different model parts on a bike. In a dream world, I would be able to swap out an entire CL450K4 front end on the bike. Would CL450 forks work with a CB550/750 top bridge? I feel like my bike is in a very "unique state" and these questions may not be able to be answered, but thought I would ask anyways.

Question #1: The forks haven't been identified yet, they came with the bike when the family got it in 1976. Are there any telltale signs? Is there a model number or stamp anywhere? For example, my exhaust is stamped HM320. Headlight bucket and "modified" fork ears are from a CB350.

Question #2:
For aesthetic purposes I would like to have a cable holder bracket on the handlebars. I don't know if buying one from a CL450K4 would work though. I took a couple pictures of the measurement. If anyone has time to measure theirs, that would be great. Measurement came from the center of the holder bracket hole.

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Question #3: The wiring for the gauges definitely need new rubber "boots/grommets'. Does anyone know where I can source these from? The parts diagram had the wiring harness as one whole piece.




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Question#4: The son also stated that he tried to use a gauge bracket from a CB350, but it was too short in length. Also curious if one from a CL450K4 would work. Not sure how I would take measurements.

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These items aren't necessary for the bike's current operative ability, but would sure make me feel better if they were on there.
 
It seems that the early to mid 70s CB450/550/750 models all use 35mm fork tubes, so you should be good there.

The gauge wiring is hard to find in my experience, but Sparck Moto has some aftermarket replacements.

I can measure a 450 cable bracket tomorrow and will edit this response if no one beats me to it.

Edit: See response below.
 
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It seems that the early to mid 70s CB450/550/750 models all use 35mm fork tubes, so you should be good there.

The gauge wiring is hard to find in my experience, but Sparck Moto has some aftermarket replacements.

I can measure a 450 cable bracket tomorrow and will edit this response if no one beats me to it.
Thanks for your input. That would be much appreciated on the measurement.
 
The original fork tubes for your bike were only chromed from the steering stem down and they used external springs, so the differences are obvious in that regard. The top bridge was not a clamp style like yours has now, it was the bolt-through style like the earlier 350s and 175s had where the "cap" was also the large bolt that held the top of the fork tube. With the angled fender mounts on your lower fork legs combined with the clamp-type top bridge, it seems none of your front end is original. Also, though the clamp areas and steering stem hole align with your current top bridge, the handlebar clamps are not all the same width between different top bridges too. Typically no model or other reference numbers on forks that I can recall seeing.
 
Here's what your forks would have been originally, so you can see how different things are now

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Newbie question in regards to the engine.

Down the road with proper instruction from here, if I were to replace the cam chain tensioner gasket and check that the tensioner is working properly, would that ‘reset’ the cam chain adjustment? Would I have to do valves and points timing all over again? Thanks..
 
Newbie question in regards to the engine.

Down the road with proper instruction from here, if I were to replace the cam chain tensioner gasket and check that the tensioner is working properly, would that ‘reset’ the cam chain adjustment? Would I have to do valves and points timing all over again? Thanks..
After the tensioner is reinstalled, you'd do nothing more than the same adjustment you would do periodically. Valves and points adjustments won't change. Just the reminder, DO NOT rotate the engine at all when the tensioner is removed.
 
After the tensioner is reinstalled, you'd do nothing more than the same adjustment you would do periodically. Valves and points adjustments won't change. Just the reminder, DO NOT rotate the engine at all when the tensioner is removed.

Very much noted about not rotating the engine. I’m not 100% confident that doing the cam chain adjustment had any effect. I didn’t hear an audible click, and I didn’t feel the rubber plunger move by prodding the inside with a small tool. Could have been done previously. Just want to pull it to see that it’s operating as it should.
 
I realized that the clamp spacing measurement on my bike might not be what you need. I had momentarily forgotten that my CB450K7 was converted by the PO back to "stock" after a former life with ape hangers. Much of the front end seems to be from a CB500T, including the top bridge and gauges. The bolt spacing for the cable bracket would be 10cm between the handlebar clamps, but mine has no bracket.

I gave away the top bridge from my CL450 parts bike and I think I kept the bracket, but have yet to locate it or the handlebar clamps.

Is anyone else able to provide Dan with this measurement on a stock 450?

Edit: I found the cable bracket. 10cm seems correct.

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I realized that the clamp spacing measurement on my bike might not be what you need. I had momentarily forgotten that my CB450K7 was converted by the PO back to "stock" after a former life with ape hangers. Much of the front end seems to be from a CB500T, including the top bridge and gauges. The bolt spacing for the cable bracket would be 10cm between the handlebar clamps, but mine has no bracket.

I gave away the top bridge from my CL450 parts bike and I think I kept the bracket, but have yet to locate it or the handlebar clamps.

Is anyone else able to provide Dan with this measurement on a stock 450?

Edit: I found the cable bracket. 10cm seems correct.

View attachment 31740
Thank you to you and AD for providing measurements. I think the cable bracket is going to fit.
 
I was curious where I could find a good quality set of front and rear spokes for the CL450K4. The 19” front wheel seems harder to find.

I’ve narrowed it down to two options.

I called Buchanan’s. They can make me a custom set. $168 per wheel. Stainless steel.

Or a set from Taiwan on eBay. $40 plus $40 shipping. Both wheels.

Has anyone had experiences with either?
 
I don't have experience with either, but what are the part numbers of the spokes you need ?

Front wheel:

SPOKE B (9X155)(INSIDE) (Quantity: 20)
97309-52150-1

SPOKE B(9X154.5)(OUTSIDE) (Quantity: 20)
97548-52149-1


Rear wheel:

SPOKE A, RR. (Quantity: 20)
42601-283-000

SPOKE B, RR. (Quantity: 20)
42604-283-000
 
Another topic of interest:

Whenever I put the bike on the centerstand, the brake pedal will shift its position. It ends up extremely close to the right crankcase cover. We're talking 1mm close. You could slide a sheet of paper between the pedal and crankcase.

Here is a shot from the side. As you can see, there is a scrape mark on the oil filter cover. That is from when I was on the bike with the centerstand down and decided to test the brake light with the pedal. I stopped compressing the pedal when I felt the resistance.

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More shots from underneath (Centerstand is down)

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When I first learned how to use the centerstand, the bike stood on a semi "uneven" surface. Various stones and pavers. Hopefully this didnt bend anything. These pictures were taken on a completely level surface.
Also, I've always wondered about the brake pedal being two different colors, silver and black. Seemed like it was painted. Luckily, I could always phone the son who worked on this bike.

Edit: It also looks as if the brake pedal arm, is being stopped by the footpeg mount.
When the centerstand is up, the brake pedal has full range of motion.
 
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You can see that shaft is definitely bent. Once that shaft is straightened or replaced the brake arm may need to be straightened too.
 
Nope. They look good and laced and pulled up just fine. Nipples are a little taller and spoke head angles are slightly different. Nipple wrench flats are smaller than OEM, so I had to use a different nipple gripper (spoke wrench) than my usual.
Got them ordered!
 
Can anyone identify this part, or what it originally came off of?

There were one of these mounted on each rear turn signal bolt. I’m assuming to be used as a spacer since the rubber grommets are missing. It’s got an oval shape. Not anywhere on the turn signals diagram.

IMG_4740.jpeg
 
Just googled that. Yes that’s exactly what they appear to be. Weird
I wouldn't have thought of that myself, been too long since I had aftermarket wheels on a car. That said, it's an interesting adaptation which was a bit creative (depending on how it was employed of course).
 
Just wanted to give everyone a sneak peak on what is currently going on with the CL450. I dropped it off at a mechanic's house. He specializes in the repair/restoration of vintage Japanese dirtbikes. His personal dirtbike collection is immaculate. They all look like they are in showroom condition, even though he rides them quite often! We've been communicating for quite a while, and he was excited to take the CL450 in. So far he has outdone himself. He takes pride in reading the service manuals and not paying attention to any Youtube hacks.

Currently the rear wheel is in the final stages of being complete and I couldn't be happier.

Rear wheel hub.

He could not locate any peen marks on the bearing retainer. Oddly enough, something wore down the seam on the retainer and it "blended" together with the wheel hub.

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He lightly used a ball file on the retainer seam to find it. With heat and kroil, the retainer finally opened using the retainer tool.

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Cleaned up with new bearings in.

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New alloy rim from 4into1(Rising Sun), and Taiwan spokes from Ebay. Two peen marks added to retainer.

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Brake hub cleaned up (original '71 shoes were in there, they were peeling/delaminated!)

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Next the wheel was dialed in on his truing stand.
Here we see the rear chrome fender installed,
Turn signal mounts facing the correct direction with the missing grommets on them.
Rear shocks cleaned up. He took off the shrouds and springs to test them, they still work fairly well. No leaks.
Shinko 712 tire (thanks AD)
New rear sprocket.
Very good condition rear axle put in (the original was very pitted and rusty, also installed backwards..)
Chain adjusters cleaned up.

A lot more pics to come in the future.

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I briefly cringed when I read that you had someone working on it for you, but after reading more it looks like he's doing good work.
Brake hub cleaned up (original '71 shoes were in there, they were peeling/delaminated!)
And when you see the white corrosion present, you can pretty much guarantee the linings on the shoes would delaminate. Smart replacement, I'm sure the front is no better considering how this bike was treated (to weather and other abuses).

The rear half of the bike is looking a lot better. (y)
 
I briefly cringed when I read that you had someone working on it for you, but after reading more it looks like he's doing good work.
Haha yeah I expected that response. He has been top tier so far. Personally, I hit a wall with the build. My workspace is the back porch of my house (uncovered). I don’t really have the space to purchase new tools for what the bike needs. Plus, all of the replacement parts that I would have no idea how to do(I know you guys would have helped me though). If I had a garage/shop, I would have been all over it.


Smart replacement, I'm sure the front is no better considering how this bike was treated (to weather and other abuses).

The rear half of the bike is looking a lot better. (y)

The front wheel is gonna get the exact treatment that the rear one got. Also, he discovered the swing arm bushings were completely shot. The rear end of the bike had 1-2 inches of side to side movement. Replaced those with the bronze bushings from the CBX site.

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Not at all surprised about the swingarm bushings, the composite material the originals were made of didn't last too long. Good choice of bushings, I bought bronze ones off eBay for my 450 before we started VHT and got CBX Performance onboard.

Glad you found someone who can do things right for you, and of course we would have helped you through whatever you came up against but I absolutely get the situation you're dealing with at home. Time to turn that back porch into a small shop, LOL
 
Looks like great work there. Great pics too. He deserves a shout out here.

I would have loved to see the bushings with that much play.
 
Looks like great work there. Great pics too. He deserves a shout out here.

I would have loved to see the bushings with that much play.
Thanks a lot. Here are the bushings. I know you probably can't tell by this photo, but there was a ton of play!

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He started his side business maybe a year ago. He does dirtbike rebuilds for customers every now and then. His personal collection is immaculate.

Here's a link to his facebook page, where he will be posting periodic updates.

Here's a before and after from his personal collection. The 1st photo is right after he picked it up.

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Those short outer bushings (that got replaced) must be where the worst wear was. The hollow inner center tube must be harder metal so he could re-use that, I'm guessing.

I can tell he's doing great work and that Yamaha is a nice part of his rolling resume. That's cool that you found him and I hope he's enjoying doing a road bike resto.
 
Those short outer bushings (that got replaced) must be where the worst wear was. The hollow inner center tube must be harder metal so he could re-use that, I'm guessing.

I can tell he's doing great work and that Yamaha is a nice part of his rolling resume. That's cool that you found him and I hope he's enjoying doing a road bike resto.
Yes, the hollow inner center tube was fine and reused. I forgot to mention something. The bike's odometer currently says 5,100 miles, with the son stating that it was swapped out at some point. He responded to me recently. and said that the mileage on the original odometer was 8,900 when it was swapped out. So therefore we can say that the current mileage is at least around 14k or so. Still, this bike looks very rough for that mileage! Especially since the original motor was out the bike momentarily when those miles accrued.
 
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Yes, the hollow inner center tube was fine and reused. I forgot to mention something. The bike's odometer currently says 5,100 miles, with the son stating that it was swapped out at some point. He responded to me recently. and said that the mileage on the original odometer was 8,900 when it was swapped out. So therefore we can say that the current mileage is at least around 14k or so. Still, this bike looks very rough for that mileage! Especially since the original motor was out the bike momentarily when those miles accrued.
But do we know the replacement speedo started at zero? Much of the 5100 miles on it could have been accumulated on the bike it came from.
 
Just wanted to update everyone on the CL450K4 progress.
Huge thanks to JM Cycles and Restorations

In no particular order:

Front End
Rebuilt CB550 internal fork springs (New fork seals, 10w fork oil added, new copper washers, cleaned up and polished)
New Shinko 712 tire w/ rim strips
New Taiwanese spokes
New Rising Sun rim (Wheel was trued, he said it was a pain due to a slight blemish in the rim)
New brake shoes
New front wheel bearings
New tapered roller steering bearings
New CMC top bridge (CL/CB450 K5-K7) (D-washers added)
Replacement steering stem (CL/CB450 K5-K7) (Painted to match the top bridge)
Replacement chrome fork ears (CL/CB450 K5-K7) (Thanks x2 Brody)
New rubber gaiters
Added the missing tongued brake washer (the tabs have not been bent yet)
Added miscellanious missing washers and bolts
Added handlebar dampers and clamps (One is not pictured, due to drying after painting)
Wheel hub and hardware cleaned and polished
Replacement CL350 fender added (With 2nd hole drilled and grommet added)
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