Quote Originally Posted by axa View Post
Ive been looking for more motor nearly as long as ive owned the bike... nothing feasible.
I'm likely just going to get the rebuild kit and head for $180 and call it a day...
ill get old waiting to hit the lottery on another LS650...

Out of curiosity i researched the price of a dozen 68mm over pistons, and boring .5 from the cylinder wall...

The place that bored out my LS650 does it for about 35$ and i needed to confirm the 3mm walls could go down to 2.5 without trouble...
But the custom pistons would run near 350 each in small quantities...

400$ + just not that feasible for a 7cc bump.
The wall thickness on my GS engine is 1.95mm with 10.5:1 compression and turns 13,000 thanks to aftermarket valve springs.