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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Help please! Clutch is acting weird.
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[QUOTE="rmc_olderthandirt, post: 1352625, member: 68872"] This behavior is common, and in fact might be "normal" based on how severe it is. The clutch operates in an oil bath, and the viscosity of the oil will provide a little coupling between the plates even when you are squeezing the clutch lever. This coupling is enough to get the gear sets spinning when you are in neutral and then when you shift into gear there is a significant "clunk" and the bike can lurch a bit, especially if you had been revving the engine a bit. With the transmission in gear half the clutch plates will be held still which results in a significant load on the engine due to the "clutch drag". If your idle is set too low or if the carburetor idle mixture is incorrect for the conditions (like when the engine is cold) it can kill the engine at idle. Once the engine heats up, however, the oil thins out and the coupling between the clutch plates due to the oil reduces. Your bike might idle a bit better warm as well so you don't experience the problem. One thing you can do that might improve the situation is to run a multi-weight synthetic oil, or simply a much thinner oil. I have been using a 5W-20 synthetic which has helped my bike a bit. Rod [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Help please! Clutch is acting weird.
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