What!!! Yes buying a faster bike will solve you power problems but it gona cost you a lot more than boreing and a new set of pistons and gaskets. "Wiseco" makes a 637cc kit, witch is what I used, but it is 13-1 compresstion so you must use the highest octane you can get(94?) + booster. I think it cost me about $1000.00 Can. for that part of the bike and she really goes! They probably make a lower comp.

 

have seen a cbr 6 fitted with 900rr pistons in a uk mag performance bikes, think fitted straight in with little mods eg gasket etc. took it to 695 cc. also could fit 900rr engine. or just buy bigger bike.

 

i believe you could find a 900rr motor and swap it in there. Do they make a stroker kit or anything for the F3? I think i saw someone posting something about that once