one cylinder not firing, could be something in engine?

andrewm

New Member
hey i've only had my 1975 cb360 for a couple of months it's my first bike and i'm learning lots but unfortunately i think i've messed something up by being impatient and inexperienced.

The guy I bought the bike off had nylons zip tied over the carburator openings in place of air filters as a temporary fix I guess. I noticed the other day that they had big holes in them so I thought I should replace them in the mean time while trying to find real air filters as replacements. Anyways I guess I didn't have them on there tight enough or should have used something to stick them on there better because on a short ride I noticed the bike acting super weird.

Anyways get back and the bits of cloth are gone, shit! i think they must of got sucked in. check one and I can see the cloth in there. I take the carb apart and get it out. On the other carb though there was sign of the cloth though so I thought it either had just came off and didn't go in (unlikely) or it made it's way through the carb into the engine.

The bike still ran seemingly fine after this took it on a short ride and got it into 4th gear and everything seemed normal enough. Today I noticed though that exhaust of the same side as the carb where I couldn't find the cloth was blowing cool air instead of hot which means the cylinder isn't firing I guess?

Could a small bit of cloth in the engine somewhere be causing this (likely)? is there anything I can try before taking the engine apart? If I do have to take the engine apart where would that cloth be most likely to end up?

If anyone has any tips or advice please let me know, feel pretty stupid about this mess and would love to get my bike running good again. thanks in advance!
 
Sorry, but I have to laugh at this one!

If it was my problem, I would pull the carbs and the headers first and start simple, but yikes, I have no prior experience with this issue. Anyway, if it helps, more than likely any issues will be no farther down than the head, and the bottom end shouldn't have to be torn down.

The real fix is probably a head removal and inspection. Just be patient, and it is easy.
 
This is a joke thread right? Like the guy that put the NOS energy drink in his tank?

In case it is real, the material probably got sucked into the cylinder, burned up and expelled through the exhaust. As it burned up, it probably left a nice coating of burnt plastic all over the inside of you cylinder head. My guess is the spark plug is now fouled by the plastic residue. Replace the spark plug and you should be good to go. However, you might want to do a compression check to see if it screwed anything else up or is somehow stuck on one of the valves. You can borrow a compression tester from Autozone. While you have the plug out, use a flashlight to see if you can see anything in the cylinder. You can also take the carbs and exhaust off to see if you can see anything in the exhaust ports before cracking the engine open.

Did I get hooked?
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