Will a 2002 Yz125 bottom end fit on my 2000 yz125 dirtbike?

Question

I need a new bottom end and was wondering if it would fit. I have a 2000 yamaha yz125. I also would like to know if a yz250 bottom end would fit.

Answer 1

what do you mean by bottom end?  just the cases, the crank, the transmission, or all of it.

the crank is the same.

the transmissions are different from 2000 (6 speed) to 2002 (5 speed) and you can't use the 6 speed in the '02 cases.  the engine mounts won't match either.  a bottom end from a 1996-2001 would be much easier

Answer 2

the 00 and 02 yz125 motors should be the same so it should work. the 250 wont fit for sure though.