I've currently got an '86 TRX 250r with a turner '89 TRX Race mid range pipe with a FMF Q silencer and am thinking about changing it up some. Part of the reason is I also have an '86 ATC 250r with a full fmf exhaust and it makes the TRX feel a little lame. Both machines are set up nearly identical other than the exhaust. Both have a boyesen rad valve, a pwk 35mm A.S. carb and 12/39 gearing. The ATC is much more responsive and will even rev out better than the TRX, my thought is the turner mid range pipe is the reason. Maybe what I'm feeling in the low to mid range is the nearly 40lbs weight advantage the ATC has over the TRX? I've done a little research and it seems a lot of you guys don't like the fatty on the TRX, if it performs like it does on my ATC I'd be very pleased. I don't ride the ATC much, its mainly a garage piece but I took it out this past weekend for a 30-mile ride with my brother on his lt250r and remembered just how much fun the ATC is! It requires a MUCH better rider to be fast on, riding a quad sure makes you lazy! I just trail ride in a variety of conditions, tight woods, open fields and everything in between. Anyone have any input on the fatty for the trx? Would it be a better pipe than the turner I have now for the conditions mentioned earlier?