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post #1 of 4 (permalink) Old Jul 12th, 2009, 9:40 am Thread Starter
 
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Transmission Noise

1994 K75RT. Transmission has a knocking sound when idling in neutral. Sound disappears if clutch disengaged (handle pulled), so it's not the motor. It only does this when warmed up, not cold. I'd appreciate any comments/condolences from other folks who may have had this problem.
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post #2 of 4 (permalink) Old Jul 12th, 2009, 9:23 pm
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Originally Posted by bernoulli
1994 K75RT. Transmission has a knocking sound when idling in neutral. Sound disappears if clutch disengaged (handle pulled), so it's not the motor. It only does this when warmed up, not cold. I'd appreciate any comments/condolences from other folks who may have had this problem.
Thanks
Well...you may not like the answer, but it's the standard BMW "They all do that". It's not the transmission, it's the (dry) clutch. You get the same thing only louder with a dry clutch on a Ducati.

Now that BMW has bikes with wet clutches, I guess "They all do that" isn't 100% true anymore.



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post #3 of 4 (permalink) Old Jul 14th, 2009, 5:57 pm
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But don't most Jap bikes have dry clutches and they don't sound noisy?

I thought it had a lot to do with the way they connected the crank to the clutch with those gears, because of the funny horizontal position they chose for the engine.

Take a vertical twin, horizontal 4 or 'V' and the crank connects directly to the clutch just about where you want it.



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post #4 of 4 (permalink) Old Jul 18th, 2009, 10:52 pm
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Every Japanese clutch in mainstream bikes is wet, as far as I know.



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