ANSWERS: 2
  • i dont think so, the 400 crank lobe measures 120mm,your crank case must be 122mm ,the bearings and seals should all be the same.so if you take it apart measure the case. ill ckeck at home on the stroke to see if the connecting rod is the same. i have a few motors apart.i might have a 250 crank also
  • the rod is the same, but the offset from center of the crankshaft is not, which will put your 250 piston out of the top of the cylinder when the rod is at the top. You need a 250 crankshaft. If you still have a good 400 crankshaft, however, I am looking for one. Sorry you can't use the 400 crank.

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