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DethWshBkr

Blew up the 426!

6 posts in this topic

Dad blew his motor yesterday on his '00 426. He said it make a terrible sound at low RPMs as he was accelerating coming out of a turn for a jump, so he stopped and shut the motor off. Now it will not kick over.

It's a 2000 model, NEVER been apart... :thumbsup:

I wished he'd had rebuilt it last year, but he didn't want to.

Oh well!

What are some possible things that may have gone wrong?

I'm thinking valvetrain somewhere. I doubt the cam cahin broke (like mine did), cause it was still running, but making a bad sound.

I guess it's POSSIBLE he jumped a tooth or something, which could have jammed a valve into the piston.

There is no visible external damage - so hopefully it won't be too bad of a rebuild. But what do you guys think??

:awww:

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Hope for something simple!

Maybe a piece of the carb slide plate broke off, and is wedged in a valve.

Sounds like crap! But, rarely does any damage. I've done it 3 times!

Good luck, whatever it is....

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2000 models had a problem with the crank keyway. Do a search here and you may find your problem.

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Dad's got the clutch off, and now the bike turns over. SOunds like something in the tranny may have gone. Seems like you guys have issues with 4th and 5th gears??

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Seems like you guys have issues with 4th and 5th gears??

Actually it sounds like YOU have 4th 5th gear problems!

Seriously there have been issues with 3-4 th gear. Do a search here on that also.

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Ain't my 4th or 5th gear!

lol.

Dad pulled his clutch basket, and now the engine turns over. You cannot always spin the back wheel , sometimes it locks. Sounds like definite drive train.

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