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liljosht
11-20-2003, 03:00 PM
I have a 300 ex and want to put wiseco oversized pistons in it. I would like to get the (76.mm/.080) overbore piston but do not know if it can be bored out that far without haveing to get the cylinder resleeved. Can anybody tell me if the piston would be too big and if i would have to get it resleeved?
sleeveslave
11-20-2003, 04:23 PM
The 76mm piston does not require an oversize sleeve.


Northwest Sleeve
Tech Staff
liljosht
11-20-2003, 04:37 PM
thanks for answering my questiom. I will have to get my sleeve bored , right????
sleeveslave
11-20-2003, 04:46 PM
Yes. Buy the new piston kit, then find a reputable machine shop/rebuilder to bore and set the clearance for you.

Northwest Sleeve
Tech Staff
liljosht
11-20-2003, 04:55 PM
Thanks again. i know of a good shop to get my cylinder bored. my friend got his blaster cylinder bored there.:D
liljosht
11-20-2003, 05:15 PM
when i put the oversized piston in the engine, will i need to rejet the carburator??
bradley300
11-20-2003, 08:59 PM
yes, you will need to rejet