i have a yfz 450 just put the 478 big bore kit on, stage 3 cam and jet kit w/ aftermarket airfilter, and full titanium 4 exhaust and its got about 2hrs on the new athena kit. now i been putting 93 in it and i was wondering if anyone had any suggestions on using anything esle like race gas or something?also, i still have the stock sprockets on and havent gotten around to change em yet. i want to change the gearing but at 60 mph im crusin at 6,000 rpm with just barely holding the throttle. i think thats turning up a bit much. anyone got any suggestions on what gearing maybe i should go with when i get ready to get some sprockets?

 

id run 100 just to be safe