I just finished the firtst ride with my bike after the mods. I have an 02 KDX 220 and I just did the rev pipe first and was so impressed with the performance I went the rest of the way with the air box mod, boysen reeds and the RB designs carb mod. Wow what a difference!!!!! Ron's carb was amazing. Set up was so close out of the box it's scarry and the bike will do anything now. After years of trying to make CR250's into woods bikes with expensive mod's this is amazing. The bike will now run the fire roads with the best 250 and still lug around in the rocks and slop like no two stroke I have ever ridden. For all of you waiting! Don't waste another weekend riding your bike without the mods! Spend the $350 and let your friends go nuts trying to keep up!