What type of piston do you use? I was thinking wiesco or stock. Would I notice any preformance difference between them?

Thanks

 

the wiesco will have a tad more compression, and is a tad bit lighter. I would use the wiesco.

 

anyone esle?

 

The wiseco is a forged piston, and stock is cast. Pro-X also makes cast pistons and from my experience, more pro's use cast. I myself prefer the cast piston because of its pourus design. It has a tendency to soak up the oil. Therefor, they will last longer in a low oil or high heat situation. The wiseco is a bit lighter as dragracer was saying, so then- yes it will rev higher. But the difference is VERY minimal- I'm talking like maybe 200rpm more with the wiseco. It has been my experience that the forged wiseco pistons have a low tolerance to heat and will quickly begin to get a mushroom affect at the top, making it nearly impossible to freshen up the top end with a new set of rings. In short, for a two stroke I will always try and buy cast pistons. They last longer and they are cheaper too.
JP

Also- Wiseco pistons heat up and expand really fast. Because of this, most engine builders when boring a cylinder for the new piston will bore the cylinder a little loose. This way, when the hot rod young kid doesn't give the bike adaquit time to warm up, he can still jump on and start revving away. If the cylinder was bored to fit the piston snugg (like it should be), the wiseco piston will heat up way faster than the cylinder does causing a seezed condition because of the piston expanding from the heat. If your cylinder is loose, you will obviously loose compression.