Piston in a LT230E
 

Just picked up a LT230e in rough shape tour the motor apart no history on the quad at all don't know the year or vin number when I tore the motor apart there were some letters and numbers punched into the top of the piston A33K3 anyone knows what this means I can not find anything.

Piston in a LT230E
 

ill tell you that standard bore is 66mm. if the engine needs rebuilt you should check the rod for slop, which it will probly have... so rod bearings, and if you split the case replace the crank bearings( just $19.99.) and if you go in to the engine replace the valve seals, its worth it. my 230 was bored but didnt get the $5 valve seals replaced so it burned oil anyway.

but if you do get it running they are fun as any other quad out there!