Preditor max bore

Brandon, the 72.009mm wiseco will go without issue usually, if the stock sleeve is really perfect and straight sometimes you can sneak in the 73mm ttr piston.
 
NR and I think ARC sell the wiseco it's a 2.835" and requires a long rod. The TTR piston can be found on eBay, it uses a stock length rod, but like I said, the wall thickness on the sleeve can get iffy. Search for yamaha TTR250 73mm piston. They are like $35 with rings and pin.
 
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