421venom Posted January 9, 2012 Report Share Posted January 9, 2012 hey guys i need to bore out the cylinders on my banshee and i went to a machine shop but they said i need the pistons first but my question is how do i know what piston size i need and how do i measure them? this is the piston i have now.. Quote Link to comment Share on other sites More sharing options...
Dicklez Posted January 10, 2012 Report Share Posted January 10, 2012 Pic really shows nothing. Take your cylinders to the shop and they should tell you. Quote Link to comment Share on other sites More sharing options...
421venom Posted January 10, 2012 Author Report Share Posted January 10, 2012 i just found out its a 68mm piston, whats a one bigger size?? Quote Link to comment Share on other sites More sharing options...
Coupelx Posted January 10, 2012 Report Share Posted January 10, 2012 that looks like a monoblock? if its a cub you dont bore a cub. its plated. Quote Link to comment Share on other sites More sharing options...
421venom Posted January 10, 2012 Author Report Share Posted January 10, 2012 that looks like a monoblock? if its a cub you dont bore a cub. its plated. what do you mean?? Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted January 10, 2012 Report Share Posted January 10, 2012 what do you mean?? theres not 2 seperate jugs. it all comes off in one piece. what kind of engine are you running? Quote Link to comment Share on other sites More sharing options...
421venom Posted January 10, 2012 Author Report Share Posted January 10, 2012 theres not 2 seperate jugs. it all comes off in one piece. what kind of engine are you running? 421 cool heads, whats the difference?? Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted January 10, 2012 Report Share Posted January 10, 2012 (edited) you dont bore a cub cylinder you have it nikasil plated, it will aways be 68mm. you send the cyilnder off to millenium technologies 1404 Pilgrim Road • Plymouth WI 53073 phone: 920-893-5595. they replate the cylinder and send it back to looking brand new, get new set of 68mm pistons and your done. edit: wiseco 573mo6800 is the piston part number you need Edited January 10, 2012 by BANSHEE HP Quote Link to comment Share on other sites More sharing options...
421venom Posted January 10, 2012 Author Report Share Posted January 10, 2012 you dont bore a cub cylinder you have it nikasil plated, it will aways be 68mm. you send the cyilnder off to millenium technologies 1404 Pilgrim Road • Plymouth WI 53073 phone: 920-893-5595. they replate the cylinder and send it back to looking brand new, get new set of 68mm pistons and your done. edit: wiseco 573mo6800 is the piston part number you need what happens if i put new pistons with the cubs like that? one cylinder has small scratches inside the cylinder from where the piston broke, will that affect the compression?? Quote Link to comment Share on other sites More sharing options...
coryv4 Posted January 10, 2012 Report Share Posted January 10, 2012 what happens if i put new pistons with the cubs like that? one cylinder has small scratches inside the cylinder from where the piston broke, will that affect the compression?? it might cause the new piston to crack or get hooked on the scratch Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted January 10, 2012 Report Share Posted January 10, 2012 You obviously saw that was a problem. And members told you hippie to go about fixing it. Are you really gonna risk it? Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted January 10, 2012 Report Share Posted January 10, 2012 what happens if i put new pistons with the cubs like that? one cylinder has small scratches inside the cylinder from where the piston broke, will that affect the compression?? take better up close pictures of the cylinder walls, more then likely itll need plating but... gotta see what they look like. Quote Link to comment Share on other sites More sharing options...
421venom Posted January 10, 2012 Author Report Share Posted January 10, 2012 take better up close pictures of the cylinder walls, more then likely itll need plating but... gotta see what they look like. those are the only sctratches, shown on the pictures Quote Link to comment Share on other sites More sharing options...
Dicklez Posted January 10, 2012 Report Share Posted January 10, 2012 those are the only sctratches, shown on the pictures Looks like a replate job is in order. Can you feel the scratches with your nail? Quote Link to comment Share on other sites More sharing options...
421venom Posted January 10, 2012 Author Report Share Posted January 10, 2012 Looks like a replate job is in order. Can you feel the scratches with your nail? yeah Quote Link to comment Share on other sites More sharing options...
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