High Compression Piston ???

[tmaxx80]

are High Compression Pistons worth the money i don't want to go bigger than stock bore what would be the biggest i could go with out boring and running race gas ????

 

[jeffsyfm350x]

are High Compression Pistons worth the money i don't want to go bigger than stock bore what would be the biggest i could go with out boring and running race gas ????

Yes they are worth it cast pistons suck! JE's 10.5:1 compression 366cc.. And if you need quick answers google works great..

 

[Gen1Pat]

If you are not wanting to bore it, then you can only run what size it is now... STOCK!!!!! But, you MAY not be able to just hone it and throw a piston in there. Until it is inspected, you are gambling.

 

[tmaxx80]

i found this one one e bay http://www.ebay.com/itm/YAMAHA-350-...Parts_Accessories&hash=item4ac620fb3e&vxp=mtr

 

['00 WO-YA!]

Wiseco makes a good product but the JE is much nicer. I've used them both and given the opportunity I'd spend the extra cash for a JE again. You can also get the JE in a 10.5:1 ratio in the stock bore size. Either piece is a nice upgrade. The only down side to JE is that they offer only two bore sizes, stock and 85mm.