Can anyone tell me how much they advanced the timing? I've searched and didn't find anyone say not to do it but need to know how much so my little guy doesn't go out and make scrape metal of the new pistons, all I see is advance it a little. I will also possibly shave the head from what other suggested here about .005-.006 to raise compression, and will get some Boysen PRO reeds only doing this to give the bike more power on the straights. These bikes are just for motocross, 1 for just race and 1 for practice, and I understand after these mods I will need to run at least a 50/50 of 112 and 91 octane. Any input would be really helpfull, thanks for reading.