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View Full Version : wiseco .020 over piston???


Giz400ex
02-08-2002, 02:22 PM
Has anyone heard of this from wiseco or do they start there's at .040 over????
02-08-2002, 02:27 PM
I think the .040 is the first overbore that can be done..
Giz400ex
02-08-2002, 03:42 PM
Rico, did you harden your rockers when you got the 416 kit??
400exJOE
02-08-2002, 03:49 PM
hey Giz, there is no need to harden rockers with a new piston. Rockers and springs should be stronger if you go with a high-performance cam that is NOT a drop-in. As for the .020 pistons, i dont think they make them. Plus it would only give you like 3cc. I would either do a .040 bore which is a 406cc or not bore it at all and just get a higher compression 10.8:1 JE stock bore piston. If you do that, an xr400 cam would work great and that is a drop-in cam so no other mods are required.
Dave400ex
02-08-2002, 03:54 PM
Rico did not Harden his Rockers. With the XR400 Cam you don`t need to. It is a Drop-In. There is a little bit Wilder Cams that are still Drop-Ins. GT Thunder, TC Racing, Sparks Racing, HRC, and I`m sure there is more that have Drop-In Cams. I would just get a JE 416 Piston from Marcum`s.