Question about 2003 Yamaha YZ 125

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Puting wrong oil in transmition

Ive been told that if i have got 10w30 oil in my transmition instead of 10w40 it will cause my clutch plates to expand is this possible?
because my yz 125 2001 model stays in grear even with the clutch pulled in, i know when i pull the lever it is lifting the presure plate as i can feel it. ive opened up the clutch and took all the plates out and everything seems to be fine the inner hub moves freely without touching the outer  clutch basket, the prombel only happens when i put it all back together, which makes me think mibby the frictionplates ect have maybe grew . any sugestions will be very helpful thank you. Ryan Dundas.

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The problem did not start untill the 10w30 Honda transmission oil went in. It isn't the 10w30 thats the problem. It's the TRANSMISSION oil as opposed to MOTOR oil. There is a difference. As I said before, the swelling may or may not go away.

Best wishes Ryan :)

Posted on Apr 19, 2009

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Did you use oil rated for a motorcycle with a wet clutch? If not and you used regular motor oil you have in fact trashed your clutch plates.

Posted on Apr 19, 2009

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cape cod bob did you a good service in the manual referral. Be sure to say thanks.

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