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Discussion Starter · #1 ·
When shifting into a lower gear (downshifting and engine braking letting off the clutch I'm getting a weird grinding / rattling noise. Usually only happens at higher rpm say around 8k. has anyone else had this issue? Or any ideas as to what it may be thanks.
 

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firstly, wheres it coming from..

if its coming from the front, its not the chain..
when did it start, what event preceded it..
any servicing, new tyre, chain etc..

can you control it, make it happen
or make it not happen, if so, how..
 

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Discussion Starter · #4 ·
It's coming from the left hand side sounds like maybe the chain... I took it into honda and he said it had quite a bit of freeplay. It happened after a recent oil change. The bike only has 1000 miles on it so the clutch shouldn't be shot already should it?
 

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Discussion Starter · #5 · (Edited)
Yeah I can make it happen by downshifting at a higher rpm and lightly letting out the clutch... doesn't really do it on acceleration when upshifting. Doesn't do it while downshifting at lower rpms under say 5k
 

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no the clutch shouldnt [wont] 'be shot' after 1000 miles..
ie, it should have a good life anyway..

after an oil change, so naturally check oil level..
was that part of a service, ie, was chain adjusted..
if so, check wheel alignment, adjust excess slack..

all sorts of harmonics happening at higher revs
incl thru drivetrain and while changing gears
[loading] together with rev changes..
but shouldnt make unnatural 'grinding' noises..

its interesting just what an effect well aligned wheel/s
and a smooth straight running chain can have..

worthwhile going for precise alignment of sprockets
[axle to swingarm pivot] without any bowing of chain
sighted from the rear along its top run, when turning..

if when so sighted [like a rifle sight] you see any bowing
of chain, means axle isnt aligned.. include any movement
of chain on sprocket while hand turning wheel, such as
links lifting or pulling eiher way..
it should run 'like clockwork', straight over sprocket..

plenty of good chain maintenance videos and diy's on utube
and this forum etc.. [for anyone unsure of this alignment]

bear in mind strong forces pass thru chain downshifting at high revs,
enough to slow engine down [thus engine braking] so any small
misalignment could generate harmonic etc effects..

'grinding' tho.. wouldnt expect 'grinding'
and with a new bike that would seem
worth a honda tech text riding her..
 
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