Why does the motorcycles rear wheel spins while revving the engin? - Page 2 - Yamaha R6 Forum: YZF-R6 Forums
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post #11 of 14 (permalink) Old 11-30-2012, 09:36 PM
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Re: Why does the motorcycles rear wheel spins while revving the engin?

Technical explanation: Cold bike, cold oil, cold parts.

Metal is cold therefore the clearances between clutch and transmission components are tight hence will have the tendency to let some energy be transferred to the transmission gears. Cold oil is more viscus and with the tighter tolerances enough energy is transferred to the output shaft therefore turning wheel when cold.

Bike heats up everything expands and the oil flows, the rear wheel will stop spinning with the engine running and in neutral
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post #12 of 14 (permalink) Old 11-30-2012, 09:37 PM
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Re: Why does the motorcycles rear wheel spins while revving the engin?

It's normal, don't worry about it. It happenes because the engine oil is cold. I'm not sure why it does it, but it has something to do with the wet clutch.

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Then you need worse brakes, not better ones. I suggest adding some air to your lines and spraying your pads with wd-40 before you go out. You'll find all kinds of corner speed.
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post #13 of 14 (permalink) Old 11-30-2012, 10:43 PM
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Re: Why does the motorcycles rear wheel spins while revving the engin?

Quote:
Originally Posted by shnormo View Post
Technical explanation: Cold bike, cold oil, cold parts.

Metal is cold therefore the clearances between clutch and transmission components are tight hence will have the tendency to let some energy be transferred to the transmission gears. Cold oil is more viscus and with the tighter tolerances enough energy is transferred to the output shaft therefore turning wheel when cold.

Bike heats up everything expands and the oil flows, the rear wheel will stop spinning with the engine running and in neutral

This is the answer. That cold parts bit is way off base, but the cold, viscous oil is the correct answer.



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post #14 of 14 (permalink) Old 12-01-2012, 07:33 AM
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Re: Why does the motorcycles rear wheel spins while revving the engin?

yes...normal. Worst case scenario you just change the blinker fluid and you're all set. Like $5.

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