I HAVE A 330 ESR CYLINDER AND HEAD OFF A TRX250R. THIS IS SETUP FOR A +5 STROKER CRANK FOR 344CC. THIS HAS AN AGGRESIVE PORT JOB AND WAS RUNNING ON METHANOL. THIS HAS THE ORIGINAL SLEEVE AND STILL ON THE 1ST BORE. This came off a running motor. THIS WILL WORK ON THE
1986-1989 TRX250R AND THE 1985-86 ATC250R. PLEASE SEE PICTURES FOR
CONDITION. DON'T FORGET TO CHECK OUT MY OTHER ITEMS FOR SOME MORE GREAT
TRX250R PARTS. THANKS CVETKO