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Discussion Starter · #1 ·
Every 300 miles I put the bike up on a rear track stand, idle the motor, pop it into first gear and spray chain wax on the chain as it whizzes by. Same drill as on every other bike I've ever owned.


The 959 has a tendency to start making a horrific racket and the bike begins jerking like the chain is trying to wrap itself around the countershaft sprocket.


The first time it did it, I checked the chain adjustment and it was a bit loose, I tightened it up to spec and that seemed to quiet things down. Did it again today while lubing the chain and this time the chain seems to be still in spec.


My guess is that the firing pulses on a twin are so far apart while idling, that it is snatching the chain.


Anyone else noticed this or is something wrong with my machine?
 

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Lul, ignoring the unsafe practice, I'd say its because of our twin cylinder engine. It's already unhappy when we ride it below 3k RPM, I'd say its no different at idle. The rear wheel is not a large enough spinning flywheel to dampen out the jerks.
 

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+1 I have never done that, but I can't imagine it being smooth.
 

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Discussion Starter · #5 ·
It's not smooth, it's the 360 degree firing impulses of the twin. The inline fours fire each 180 degrees crank rotation and are smooth when idling on the stand.
 
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