SOHC.co.uk Forums > CB500/550
Trouble with bike
beardylondon:
Thanks, click this link and press play
https://www.dropbox.com/scl/fi/c0e7arncvp55ek4sse5av/Honda.m4a?rlkey=8f8y8x3wsnan273dzkov0lhdl&e=1&dl=0
--- Quote from: K2-K6 on March 03, 2025, 07:13:08 AM ---I can't see or hear the clip to judge.
But, are you sure it's running on all four cylinder competently ? If its not, then they sound poor, and that will definitely flick the chains around too.
Basic check is to start it, then stop after 30 sec, to now check the exhaust headers with your thumb looking for a cold one. If any are cool/cold you'd need to look at that cylinder again to get all running well.
--- End quote ---
McCabe-Thiele (Ted):
That sounds bad, I've been trying to identify if it's a half engine speed sound, Camshaft issues have that marker. I don't know the rotation marker for primary drive noises.
Certainly sounds like the chain is contacting the engine casing.
As Ken had said his test should help identify if it's the primary chain.
beardylondon:
Thanks Ted and all.
As I say the bike is at my Dads, have passed all this on, and I will report back.
K2-K6:
--- Quote from: beardylondon on March 03, 2025, 07:48:13 AM ---Thanks, click this link and press play
https://www.dropbox.com/scl/fi/c0e7arncvp55ek4sse5av/Honda.m4a?rlkey=8f8y8x3wsnan273dzkov0lhdl&e=1&dl=0
--- Quote from: K2-K6 on March 03, 2025, 07:13:08 AM ---I can't see or hear the clip to judge.
But, are you sure it's running on all four cylinder competently ? If its not, then they sound poor, and that will definitely flick the chains around too.
Basic check is to start it, then stop after 30 sec, to now check the exhaust headers with your thumb looking for a cold one. If any are cool/cold you'd need to look at that cylinder again to get all running well.
--- End quote ---
--- End quote ---
Yes, tried that but oddly I get a visual representation of it, in bar graph :) with no obvious option to play. Think I'll need a drum kit along with rhythm (distinctly lacking in my skill set) to replicate the sound ;D
I've not got the app though, so possibly limited at that point to view properly.
Trying for cold cylinder though, will tell you something. If it was OK running before, then unlikely to have worn it's chains while inactive.
beardylondon:
This might help...
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