I recently purchased a CRF 80 for my 11 year old son. I am interested in lightening the flywheel to get it off the line a little better. I am not interested in a big bore kit or a 100 motor yet. How much weight can I take off this stock 80 flywheel? I have read everything from "ABSOLUTELY no more than 6-8oz" up to 12oz for a 100. The mods we are starting with this weekend are Crf 100 carb (22mm) w/ 105 main and 38 pilot at sea level Uni Filter Pod Filter (no airbox) Pro Circuit T4 full exhaust BBR Rev Box Hot Cam Stage 1 15T front and 46 Rear Sprockets Back to the main question.. How much weight can I remove from the flywheel on this bike? Thanks in advance and some advice maybe with the sprockets would be appreciated as well.