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Rattling noise when in neutral

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El__burro:
Good day, i am trying to check wether or not i have a serious problem.
When the engine of my k2 is running I can hear a rattling noise (from the primary chain?) that goes away when i pull the clutch.
Its not very loud or worrying but i wouldn't like it to worsen. I've tried to adjust the cam chain (Clymer manual page 48) via the tensioner but didn't improve it.
Any other way to assess the problem?

thanks
el__burro


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hairygit:
Usual cause is carb balance, or lack of it! You need a set of vacuum gauges to set them up properly, but don't even attempt it until ALL other service items are done, plugs, points, timing, clean oil to the correct level. The CB750 engine will always seem agricultural next to a modern bike, but sorting carb balance can minimise that rattle/clatter.

Speed:
does overall sound like carb balance they are noisy when out of sync, do that first before anything else

Greebo:

--- Quote from: El__burro on June 02, 2018, 11:37:55 AM ---Good day, i am trying to check wether or not i have a serious problem.
When the engine of my k2 is running I can hear a rattling noise (from the primary chain?) that goes away when i pull the clutch.
Its not very loud or worrying but i wouldn't like it to worsen. I've tried to adjust the cam chain (Clymer manual page 48) via the tensioner but didn't improve it.
Any other way to assess the problem?

thanks
el__burro


Sent from my SM-G935F using Tapatalk

Any chance of a video to hear this noise or you could look up member Yozzer, he had the same problem & put as video on here.

if you have adjusted the cam chain then that should be fine...for those who are not sure how to do the cam chain
here is a short video to show hot to adjust the cam chain properly.. [good video]
https://www.youtube.com/watch?v=8841eO5tvro

--- End quote ---

Paulreade:
Hi, I also have this problem. It sounds awful at tickover ( in fact it's embarrassing). I pull in the clutch and it more or less disappears. My clutch grabs when the lever is almost fully out so I thought it might be the clutch ? That was on its way out. I've just reset the timing ( static) which was out , so at least it now starts on the button ( before I could be there 2-3 minutes  waiting for it to fire). I will now reset the cam chain, I may have to consider rebalancing the carbs as many say the rattles and bangs are as a result of imbalance). I hope it's not an issue with the primary chain as I assume that's a strip down job ?. I will keep you posted as I progress.

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