what piston should i need?
- Thread starter ero blaster
- Start date
My piston at the top above the rings it's 65.58 and about half way is 65.88 makes me think it's just wore out but wanna make sure
You will also need to measure inside the bore to check if it is out of round and taper . The piston doesn't actually go to the top of the cyl. The wear is in the middle of the cyl.
If I were you I would get it bored to the next size up matched to a new piston and rings.
If I were you I would get it bored to the next size up matched to a new piston and rings.
The pistons are made that way. But depending on condition of the bore you may want to freshen up.
If you have good compression those are fine specs I believe. But let an expert chime in too.
If you have good compression those are fine specs I believe. But let an expert chime in too.
From what i read the tolerance between cylinder to piston Is .06mm or.07mm ....so that would make this piston way too small but yet it's a stock bore(66mm)and its stamped on the top 6600 but it measures 65.88mm can anyone explain this?
Because a 66mm bore is 66mm, and the piston needs to be slightly smaller.
Should still get cyl properly measured for out of round and taper.
IMO, if it is more than half of the wear tolerance, get it bored.
I have only once put a new piston in a worn cyl, and it was less than half of wear tolerance.
Should still get cyl properly measured for out of round and taper.
IMO, if it is more than half of the wear tolerance, get it bored.
I have only once put a new piston in a worn cyl, and it was less than half of wear tolerance.
This ^^^ newer Wisecos (maybe others too) actually are tapered ovals. Not truely round or straight. This is to allow for expansion of the crown and around pin where more material expands more.
