First gear gear hard clunk,
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From: poway
I knew the clunk was addressed in the touring bikes with the M8, if it was addressed in the '17s with the 103s, that is new to me.
Was it addressed? If so how? As far as I can tell the 103 tranny still doesn't use a scissor gear on first..
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From: Honah Lee
Could be wrong here but the scissor gears are on the balance cam drive system and transmission to eliminate backlash to control noise. The gear is split and spring opposed so there is no backlash yet it cannot slip or damp really. I think the slipper clutch was to dampen clunk and drivetrain shock. Also, the rubber drive in the rear wheel drive pulley reduces shock to drive train.
Last edited by Jackie Paper; May 16, 2017 at 05:38 AM.
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From: poway
Could be wrong here but the scissor gears are on the balance cam drive system and transmission to eliminate backlash to control noise. The gear is split and spring opposed so there is no backlash yet it cannot slip or damp really. I think the slipper clutch was to dampen clunk and drivetrain shock. Also, the rubber drive in the rear wheel drive pulley reduces shock to drive train.
The slip assist clutch does nothing to help with any rattles. In fact it makes rattles and clunks worse as pressure plate needs rotational clearance to perform assisting / slipping action. I suspect the main reason for it was an attempt to reduce lever pressure on the assist side. The slip side keeps rear tire from skidding on down shifts by releasing pressure on the clutch on decel. This slipping also keeps the crank from twisting, reduces shock to the drivetrain and likely helps keep the primary tensioner from ratcheting too tight. Unfortunately it adds to drive-line slop and causes clunking when shifting.
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From: Honah Lee
I agree with the rattle. However, you need to show some engineering fact to how it would slow anything. The dragging clutch is what spins the shaft and all the gears are always engaged. How would the anti backlash gear slow the shaft down. The gear teeth need some play between them. That scissor gear basically is just two narrow gears with springs between them making the gear tooth push in the opposite direction eliminating any lash when freewheeling. When under load, the even out.
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From: poway
I agree with the rattle. However, you need to show some engineering fact to how it would slow anything. The dragging clutch is what spins the shaft and all the gears are always engaged. How would the anti backlash gear slow the shaft down. The gear teeth need some play between them. That scissor gear basically is just two narrow gears with springs between them making the gear tooth push in the opposite direction eliminating any lash when freewheeling. When under load, the even out.
BTW minor detail. It's not 2 narrow gears but one wide one that transmits power and a narrow on to control the lash.
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From: Texas
Durham man;16236167]I like to first gear clunk , locked and loaded! what gets me is when it does not clunk , I usually hit it a couple times to check! Clunk good!
squeeze the lever...1-down...hear the clunk-feel the clunk...ready to rock and roll!
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