Hello,
I got my cylinder bored to 20 over and ordered some Pro-Lites for my Banshee. I got them in the mail today..WHOOOO!!!!!!!!!! But on the box they say "clearance.0030" What is that? Does that mean they are size 30 over and too large for me to use?? Please Help!! I need to get back out on the track! I think I'm startin to get the shakes..[img]i/expressions/face-icon-small-wink.gif[/img] Frank

 

It means you need 3 thousandth of an inch clearance between the piston and cylinder.

 

aka.......you are ten thousandths short.......

 

Hey Guys,
Thank you for the quick replys. I need some quick help!![img]i/expressions/face-icon-small-smile.gif[/img] So will they work with my 20 over bore? I am worried they sent me the wrong pistons! thnaks, Frank.

 

it won't work unless it is a 30 over bore.....

 

Hey,
So they sent me the wrong size pistons!!!!!!!!!!!!!!!!!!!! AHHHHHHHHH!!!!!!!!!!!!! I have a 20 over bore size...I clearly said 20 over!!! AHHHH!!!!!!!!!!!!!!! Stupid people..Sorry, my Quad has been down for a while now with a busted trans and I just got it back and ready to put my top end in and hit the track and now I have to wait until Tuesday at the earliest just to contact the stupid place I bought my pistons from. I thought Banshee bores were 20 over, 40 over,60 over and 80 over.... Frank.

 

The machine shop bored your cyls. without having the pistons.[img]i/expressions/face-icon-small-shocked.gif[/img] That's not how it's done right, in fact it shouldn't be done at all. Like Raptor58 said it meens you need 3 thousanths clearance between the piston and the cyl. Who ever bored it should have known this and had YOUR piston to do the final sizing and honing to get that clearance. If you very lucky you'll be all right, but have the clearance checked before you put it together. If it's off hopefully it's tight and the cyls. can be honed to fit it right, if you have to much clearance there's not much you can do but get the next size piston and have it done right.

 

The box and/or the piston should be marked .020 , that would be 20 thousanths.