Engine or tranny knock at idle, 2003 K1200RS - K-Bikes.com - Excellence in Motion
 
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post #1 of 3 (permalink) Old Aug 22nd, 2016, 4:40 pm Thread Starter
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Engine or tranny knock at idle, 2003 K1200RS

This bike has 30k miles on the clock. I've owned it for 18 months and recently, due to oil leaking, had the clutch and seals replaced by my BMW dealer (yikes!). The engine or transmission has rattled at idle since I bought and I was told replacing the clutch would take care of the noise. It has not. It's difficult to determine where the knock or rattle is coming from (engine or trans) but it does quiet slightly when the clutch is engaged. Thoughts/advice?
Thx
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post #2 of 3 (permalink) Old Aug 24th, 2016, 3:03 pm
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It is most likely that the box of rocks noise comes from the output shaft which lies below the crankshaft. It is driven from the crankshaft, but rotates in the opposite direction to iron out the torque reaction. The flywheel and clutch are on the end of this output shaft.

It is usually play in the bearings which causes the noise, and it is a case of 'they all do that, Sir'. It can be fixed by shimming out the play, but it isn't a small job. You were mislead if you were told that a clutch replacement was going to silence this noise.
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post #3 of 3 (permalink) Old Aug 25th, 2016, 8:34 pm
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Quote:
Originally Posted by xpc316e
It is most likely that the box of rocks noise comes from the output shaft which lies below the crankshaft. It is driven from the crankshaft, but rotates in the opposite direction to iron out the torque reaction. The flywheel and clutch are on the end of this output shaft.

It is usually play in the bearings which causes the noise, and it is a case of 'they all do that, Sir'. It can be fixed by shimming out the play, but it isn't a small job. You were mislead if you were told that a clutch replacement was going to silence this noise.
+1 to all of the above. Particularly that a new clutch will (not) quiet things down. On the basis of that comment (BMW dealer or a guy with a big tool box?), I'd be less than 100% accepting of any new suggestions.

Not all who wander are lost. Which still leaves room for more than a few lost wanderers...

Red Flash - '03 K1200RS, lightly farkled
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