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Dirt Bike Brands - Other
Possible explanation/fix for the some of YZ426 clutch problems.
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[QUOTE="RichardM, post: 17795, member: 17858"] Update: The "possible fix" did not work as I posted before. I changed the oil to Yamalube R which seemed to help but did not resolve the problem satisfactorily. My bike was quickly running out of Warr. The next step was to grind the shaft down some more and deepen the spiral grooves which they did but since Ron at Rocky Mountain Cycle (the mechanic in the picture) had already taken the clutch apart I had him put in the Hinson clutch basket. I rode my bike for a couple hours at the track tonight with no sign of the problem. If someone out there has the problem and does not want to put in a clutch basket like I did then I would say you should grind on the shaft. Worse case you have to buy a new one. Hinson basket is $250 or less with mail order. I would also tell anyone who has this problem to run Yamalube R through a couple oil changes. If it doesn't help try mobile 1. It may help or hinder the problem, I don't know. Since I have had problems I am going to be a sucker and only use Yamalube R. With my discount it is within a dollar of Mobile one. I did talk to a guy at the track today that did not have the problem on his 426. He has only used Yamalube R. My conclusion. His push rod was closer to tolerance thus the clutch got more oil. Yamalube R does fix the problem and I just didn't run it long enough. It could be a weight thing. I am almost 100 lbs heavier than the other guy. The president of our MX association is as thin as a rake and has the problem as well on his 426 but weight would seem to only exacerbate the problem. Hope this helps others out there but it seems for those having the problem the Hinson basket is the only way to go. Pretty crappy on Yamahas part, they got to know this is a problem. Maybe someone will start collecting serial numbers and hand them to a lawyer to start a class action law suit. As much as I hate lawyers and law suits some times it is the only way to make a manufacture live up to a Warr. I hope Honda produces a 4 stroke. If it proves to be solid I will have my name on the waiting list (for the second year model only)Update: <p align=right>04-28-2000 :Edited [/QUOTE]
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Dirt Bike Brands - Other
Possible explanation/fix for the some of YZ426 clutch problems.
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