JE makes Std bore pistons for the eariler 250's, the lowest compression they have is 12:1
http://www.jepistons.com/Catalogs/Po...inja_250r.aspx
Just a thought..... have you looked for any spare motors around you? I can find 08-12 250r engines all day long for $300 bucks..... might be worth it to just buy another motor and try again?
Thats what my plans are unless I decide to let the wastegate go free and boost 26psi lol.
My bike has only been to 10,000 rpm but its help up with probably 10 runs with no wastegate but I also ran it pretty rich (11.0:1 AFR) and also am on E85 with 30* timing I wonder how it will like the upper rpms!!!
I should know today or tomorrow if it winds up I have a bad ECU or not my bike free revving or under load wont go above that 10k, so I have it flashed back to stock and gave it to a buddy who works at a shop to test on another bike for me, fingers crossed his test bike does the same thing!