Maraakate
Veteran Member
This is a continuation of @79CM400A thread here. We talked via PM for a bit and setup a time for me to come out to Bellefonte and pick up his 79 CM400A and see what's up with it. Not too bad, a 2 1/2 hour drive.
The bike is in very nice shape. Whoever owned it before did take care of it. (Note: took the sidecovers off while driving the bike home so they wouldn't have a possibility of flying off down the highway).

Hard to tell in this picture (and I have a better one later in this thread), but the parking brake cable is routed OUTSIDE of the carb. This is wrong, and a sign that the carbs have come off before which means I need to look them over very carefully:


A couple of things stuck out. The left side carb is leaking:


The right-side spark plug cap was barely hanging on (credit to @79CM400A for pulling the wire off to show me this) and it's at the end of it's useful snipping back. Will order a DynaTek DC11-2. In the meantime I got it to barely fit enough to start it up.

Rough running. Started it up and right side is somewhat sporadic. Extreme lag on the throttle. I tested the pilot mixture screws and the left side works as it should but the right side does not respond at all.
Looked down and saw the drain plugs were still there, pulled them, but nothing really came out (a good thing).

From here I went to take the air box cover off and noticed one screw was rounded off:

Got it out and well, it's a K&N filter and it's also NOT oiled. I will be ordering an Emgo filter. In the meantime, I put my own filter on there quick to test it out and it does run better but the idle hunts all over the place. To be expected with the right side partially plugged.


Checked the brake fluid, it has been replaced recently. However, I will drain and convert to DOT5/Silicone soon.

(Continued in next post...)
The bike is in very nice shape. Whoever owned it before did take care of it. (Note: took the sidecovers off while driving the bike home so they wouldn't have a possibility of flying off down the highway).

Hard to tell in this picture (and I have a better one later in this thread), but the parking brake cable is routed OUTSIDE of the carb. This is wrong, and a sign that the carbs have come off before which means I need to look them over very carefully:


A couple of things stuck out. The left side carb is leaking:


The right-side spark plug cap was barely hanging on (credit to @79CM400A for pulling the wire off to show me this) and it's at the end of it's useful snipping back. Will order a DynaTek DC11-2. In the meantime I got it to barely fit enough to start it up.

Rough running. Started it up and right side is somewhat sporadic. Extreme lag on the throttle. I tested the pilot mixture screws and the left side works as it should but the right side does not respond at all.
Looked down and saw the drain plugs were still there, pulled them, but nothing really came out (a good thing).

From here I went to take the air box cover off and noticed one screw was rounded off:

Got it out and well, it's a K&N filter and it's also NOT oiled. I will be ordering an Emgo filter. In the meantime, I put my own filter on there quick to test it out and it does run better but the idle hunts all over the place. To be expected with the right side partially plugged.


Checked the brake fluid, it has been replaced recently. However, I will drain and convert to DOT5/Silicone soon.

(Continued in next post...)




















































































































