love2ride06shee

Hello every one.Im new 2 this site( GREAT SITE) MY question is how moucth timming can i advance and wen i do if i will have 2 change my jetting and gas? stock 06 t5s ,2:1 high flow toomey intake kit, main 280, pilot 25,needle 4th groove on 92 octane. elevation about 230 above sea level, temp.40-60winter 80-105 summer. I will be riding it most in the dunes (pismo). THANK U ALL IN ADVANCE!