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Discussion Starter #1
Bone stock machine with a Vortex ECU. Gets oil changed regularly to the point where it never comes out dirty. Started it up last weekend, warmed it up, rode for 3 minutes or so, shut it down, and it sounded like rocks spinning around inside the engine when I tried to start it back up. Flywheel, starter clutch, stator, all smoked now. $541 parts bill. No signs leading up to this. Sucks big time but nothing you can do except open up the wallet.


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Common yfz450r problem. Lock tite the bolts when you install them. Clean with brake clean really well

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Hey rider u talking about the 5 bolts that screw where the coils are at? The 5 screws backed out from the 5 holes where the copper coils are at? Those screwz?

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When this happens can the case break too?

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I think it's 6 screws and they are the stator screws. No, it is not likely to break the cases.
 

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These allen head bolts??


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Discussion Starter #10
Common yfz450r problem. Lock tite the bolts when you install them. Clean with brake clean really well

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Considering that the bolts, flywheel, and starter clutch will be brand new, that shouldn't be very hard to do. I always loctite them. Usually I'm doing this job on the KFX & LTZ400's. Even a few Honda's. This is my first YFZ replacement though.

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Considering that the bolts, flywheel, and starter clutch will be brand new, that shouldn't be very hard to do. I always loctite them. Usually I'm doing this job on the KFX & LTZ400's. Even a few Honda's. This is my first YFZ replacement though.

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This and the exploding clutch. Dont know why it keeps happening. But haven't seen one in a while.

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