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YZ400 Gearbox problem

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Hi there, i currently own a 2000 yz400f and have a problem with the gearbox. 1st and 2nd gear are fine but when i try and select third it just grinds, when you go past third 4th gear seems to be fine. Just wondered if anyone else has had this problem.

thanks steve

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No, never had that issue. Whatever it is, sounds like it needs a tearin' down to have a look. No doubt it will be obvious then!

You probably shouldn't ride it much, 'cause it could do more damage.

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You likley have a bent shift fork, and need to replace 3rd gear and the mating gear which is 4th I believe. Thats a bad deal, now you have to pull the motor and split the cases :thumbsup:

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I had 3rd gear go out on mine and it took out several others as well. Also some of the shrapnel hit the crank and rod. I was able to blend out the damage with a sanding disc. When i ordered replacements, i noticed that the replacement gears were shot peened for strenght. I think they realized they have a problem with 3rd gear. If you can do the work yourself, the cost is not that bad. If you go to a shop, your screwed

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