Will a Yamaha jet ski piston work in a blaster atv.

i think HJR uses a jet ski piston in his 265cc blaster. It seems that alot of pistons will interchange between 2strokes. I rebuilt a 82' IT 175 a while back that had a kawasaki KDX 175 piston.
 
a piston is a piston they are all the same the only differnce is size

Not always true. The dome shap can be different, pin to top, the skirt shaped different and the big difference on a 2-stroke is where the ring ends are located for your ports. I run a Kawi snowmobile piston in my yz310 kart engine and it takes some mods to make it work. Be careful & do your research.

YZOtis
 
wesico will pretty much custom build you a piston to your specs. A long time ago they built a buddy of mine a set of custom Suzuki samurai forged dished pistons for his turbo zuk project it wasnt cheep but they did it.