a strange sound when i accelerate.....mostly in lower gears...and af
Posted: Fri May 11, 2007 12:52 pm
				
				Ricky,
    
   Is this a noise that only happens below 3,000 rpm, say in low gear accelerating away from a dead stop?  Some of your comments imply "yes" - but then others insinuate you hear it above that in upper gears.
    
   If "yes", I have noticed that the counterbalancer system seems to have a torsional natural frequency in the mid 2000's that is quite audible when there is insufficient tension in the doohickey spring.  Essentially the counterbalancer system is getting accelerated torsionally in little pulses from the loose chain, and it's not hard to hear it 'clanking around' torsionally as the power delivery from the crank from a big single is - by nature - heavily interrupted.  Wow, scary long sentence there... but hopefully you can visualize what I'm driving at.
    
   If you're already installed a torsion spring on the doo, or if you've just recently had the left cover off and know the extension spring is not broken and has reasonable preload, then I'm sending you in the wrong area.  It must be something else.  Otherwise, I'd be pulling the left cover with a plan of the Eagle Mike Doohickey and Torsion Spring addition.
    
   My bike was pretty noisy in this fashion - and getting more preload in the system has made it totally quiet.  A night and day change.
    
   Bill Watson
   Phoenix, AZ
   ---
   Going insane, my KLR has been making this sound since I bought it used 
 a few years ago, nobody has been able to fix it...when I 
 accelerate.. .after it has been warmed up ( i am quite sure of this ) 
 it sounds like someone is shaking a ball bearing inside an empty 
 can...it drives me insane, and gets worse and worse as my driving time 
 extends...and starts happening in higher gears as i drive more.
 
 I have to really let the clutch out slow and accelerate super slow in 
 order to reduce it. 
 
 Any suggestions would be highly apreciated!! !
 
 
        
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