SX/SXi/SXi Pro Blew my motor

[Balduccimoto]

I blew the motor on my 93 trying to tune to a factory pipe. I had 145 mains 2 turns out and it blew fairly quick. It was a low hour engine, I have put 2 littles holes in the bottom of the crankcase. Would a big pin offer me any performance gains? Is everything interchangable?

 

[sxipro02]

A big pin will favor the top end a bit, a small pin would be better for freestyle. yes everything else swaps over.

 

[motorman021]

can you swap the motor plate to an sxi pro from what i hear the pro's have the motor set further foward?

 

[SterlingSilva]

Everything swaps right over. The Sxi Pro motor is set forward about 2". The driveshaft is obviously longer