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Sudden terrible noise

  • Thread starter Thread starter overboostin
  • Start date Start date
overboostin said:
Bike was running fine then I started it up one morning and heard this:

http://i1324.photobucket.com/albums...2-9DC3-68DE8B74A3DB-7082-0000067775EFD4A6.mp4

Any idea what's causing it and how much of a bind I'm in?
Click to expand...

Are you saying that it was fine when you put it away last time and on start up next time it made that noise?

That noise sounds expensive like a piston hitting the the head, take out the plugs and rotate the crank by hand and feel with a rod down the plug hole with the piston at mid point, there should be no lash back and foward on the crank spanner.
 
tom203 said:
So you took cover off to investigate the noise, or you were working on the valves and the noise appeared after cover was reinstalled ??
How about tach drive engagement?
Click to expand...

Noise happened before I took the cover off.

Tach seems fine
 
tatu said:
Are you saying that it was fine when you put it away last time and on start up next time it made that noise?

That noise sounds expensive like a piston hitting the the head, take out the plugs and rotate the crank by hand and feel with a rod down the plug hole with the piston at mid point, there should be no lash back and foward on the crank spanner.
Click to expand...

Yeah bike sat without making that noise then the next morning the noise started.
 
On start up, was the noise there instantly or did it come on over time? Even just a few seconds? That sounds like engine speed noise to me. (opposed to half speed indicating cam problems)
 
It was there instantly. Seem to run fine, parked it. Started up the next morning and it was there
 
Is the cover still off? Did you adjust the valves and loose a fastener due to lack of proper tightenening?
 
So it's definitely coming from the clutch area. Thoughts on what it could be? Noise is no different in gear or neutral
 
OK, pull the clutch cover and find out.

Maybe the big clutch hub nut fell off.
 
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