+1. I went 102mm right away a while back and regretted it be because it doesn't leave anything for a rebuild. 11:1 with stage 2 hc is good for 93 octane
+1 i did the same and now wish i wouldnt have. You can take your cylinder to a machine shop and they can measure it and tell you if it needs bored or not. If it dont need bored just have it honed and get that 11:1 piston.
05, 686cc, 11:1 comp JE piston, Stage 2 HC, Ported Head from Trinity, +1 valves, GYTR intake, Pro Circut T4 pipe, FMF Power Bomb Header, KFX 450 Front Shocks, YFZ 450 Front Brake Calipers, G-Force Axle, 12/40 Sprockets, PRM Bumper Grab Bar and Skids