Piston/Cylinder Clearance

[dalegoldston]

How much clearance should there be between a wisco piston and the cylinder wall. The manual shows .0024-.0026. I recieved my motor from Mission and believe the wrong piston kit was sent the clearance is .020 not .002. its a Banshee motor bored .040 over stock.

Thanks
Dale

[r42176]

All of the banshee cylinders i've bored I have set up at .00225. I think they gave you the wrong piston.

Jeff

[PamFalcioni]

Dale,

Did they measure it metric, or in decimal inches? If it's metric, .020mm would be about .003" in decimal inches.

Just checking!

[RickRitter]

What size holes did they give you ?? In inches or millimeter ?

Hey Pam ,, nice to see you .. *smile* I'll call you sometime OK ??

[RickRitter]

40 over banshee holes should measure close to 2.559 inches when using Wiseco pistons . The .00225" clearance mentioned earlier is also what I think is correct .

[dalegoldston]

I had measured it with digital caliper and was talking inches. I e-mailed wiseco and recieved the info I needed they said for a stock motor the clearance should be .003" and for a modded motor, i.e. porting,cool head ect. that .0035-.004" was the proper clearance. Its a little above stock clearance due to the differance in the pistons, cast being stock and forged being wiseco. I sent Mission my cylinders and pistons they said they would make it wright. Just keeping me down a little longer is all. Thanks for the replies.