last night me and my friends where out riding on the lake i was just about to race a kid on a blaster. we line up and i let out the clutch i could tel somthin was wrong i had no power but i kept it going got into 3rd gear and bang it was died no comprestion i could push the kick starter with one finger got it back home and took the engine apart. i found the walls are all messed up and the pistion was missing some of the peice the seperated the 2 rings. i took it to a mechine shop to see what the could do and they cant bore it thre last owner put the bigest pistion they make in it and i can't find a sleeve what should i do

thanks for the help nick

 

Try Here. If they can't help try ebay for a used jug that you can still bore.