I checked a few websites out there and it looks like 2006 was the split year. America had the 790cc the SM got the new 865cc. After 2006, 865cc all the way.
I planned on having a local guy dyno and tune the bike for around $300 after I get my new pipes here next week.
After that, no more modifications. I have custom bike build starting and I need the money going there.
