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Broken piece on drain bolt

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Looks part of a transmission gear to me? Either way I dont think anything good will come of it. The bike still rides and shifts fine as far as i can tell while warming it up. 2003 yz250.

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Quite a bummer. I have maybe three rides on it after a full rebuild. What would have caused something like that?

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Im curious if they ever decided to beef up the transmission on the yz's, or are they all the same from 00 -17 basically? I had some worn dogs on my orignal and ended up buying one off some guy on ebay that looked to be in pretty good shape when I put it in.

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Definitely peice of gear. Great bike all but the weak tranny.  Shifts great tho lol

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If you are lucky, it is a tooth off the clutch basket, kick start or primary gears, can't find it there, unfortunatly you are splitting the cases.

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Yeah I imagine I wont be that fortunate. Had a race down near effingham il and the thing was wanting to fall out of second the first moto every now and then. It was really loamy , but the second moto it only did it once so i disregarded it the best I could until this oil change.

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Anywho. I assume thats the culprit, ill just have to tear her apart again

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That's how I broke mine.

Deep loam, sharp left corner, dirt popped it into neutral, and I slammed it back into second while it was still at high revs. Crunch.

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