[Emandem472]

Good morning! I have a pair of old 250ES I'm restoring, to ride not for show. I heard that the TRX 300 cranks fit in the 250 cases. Anyone know if this is true and how it works? Also any experience with the company four stroke tech?
Thanks in advance

 

[retro]

The TRX300 crankshaft has a longer stroke, so cranks aren't a bolt in swap with the 250ES motor. You mentioned Four Stroke Tech... are you asking about Mickey Dunlap? You can find a lot of his stuff covered over on the 3WHeeLeR WoRLD - Forums, Brochures, Specificiations, Technical Assistance, and More! forums.

 

[LBZ_Duramax]

Find a 2wd trx300 motor and swap the output shafts. Then you will have a reliable, more powerful big red.