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What piston do you suggest?

It is a 61x cylinder. If I use the riva pistons, Will I have to have anything done to them or will they fit right in? Thanks for the help

I am looking for a 85.5 mm flat top wiseco piston part # 9664m. Can anyone tell me where I can get one or What other piston will work. Thanks

I believe it is a newer b-pipe.

I have a superjet with a speedworx pipe on it. How do you tell if it is the freestyle pipe or not. I also have a b pipe and was wondering how to tell if it is a mod chamber or limited chamber. Any help will be appreciated. Thanks

So as long as I leave everything the way it is and run race fuel, the compression should be fine being that high. Just do not want to hurt the motor. Thanks

No, not just yet. Thanks

Oh yeh the ski does have msd tl. Thanks

That is where I figured I would start. Is 230psi to much compression if I just run race gas. It just seems high.

Just bought a superjet with a 760 big bore in it. It has 85.5 mm flat top pistons with an ADA girdled head, novi 48 carbs, with speedworx pipe. The compression is about 230psi per cylinder. It seems a little high. I was wondering if I could lower it to try and run pump gas or a mixture of...