Question about 2006 Yamaha XT 660 X

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Transmission or clutch slipping

Hello, I have a 2004 Yamaha Grizzly 660. It has about 400 hours on it and the transmission is slipping at speeds above 10MPH. It seems to have plenty of take off power but slips easily when trying to accelerate after it is rolling. I know this has a V-belt drive unit but know little about them. Does this type of drive also use clutch plates that coulod be slipping?
I typically do my own repairs but I'm not sure exactly where to begin.
Any suggestions or help would be really appreciated.

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Dear grizzly friend, I too have a 660 and it slips as well. I have followed the manual in taking pulley cover off. There are no ridges on sheath(maybe your problem). So, I am thinking one of two scenarios. The centrifugal weights in pulley are gummed up, or my clutch plates are gummed up as well(I believe they work on similar principle) Also, since I had a gas leak into crankcase, I am
thinking that my plates could be glazed which means I will have to change my clutch unit. I hope that you find out a solution to your problem----let me know as I am looking for the same solution!

Posted on Jul 09, 2010

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Make sure ther is not water in the belt housing there is a drain plug down by th botom of the floor board

Posted on Sep 27, 2009

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