Well i am new to TT but not new to MX. We just sold 3 PR2 RM85s to move on with the CRF150R and a CRF250F, we are still too small with the 250F but can ride it like a bat out of hell. He loves the CRF150R, has not ridden his bike yet due to its in a 1000 piecies right now on the garage floor, making it into a supermini. We have had some head work done, ordered a HC piston and cam, 28mm triple clamps and fastway pegs, was wondering what you guys are using for exhaust systems, we have a bunch of sponsorships to recieve discounts on systems but wondering what luck you have had with their being so many brands out there. Also who makes a taller seat for the CR or CRF ? the riders cockpit seems cramp to me, he doesnt complain, just my obversation.