I completed the airbox mod and rejetted the carb. I wanted to do something with the exhaust and was reading here on TT that installing a 250R exhaust + PMB does wonders w/o the expense of an aftermarket silencer. Today I came across a few posts about a 2R Racing tip and have to say I'm intrigued! Looking into the 250R route, I can get one local for about 100$ including the header but its another $100+ for a PMB and I'm not even sure if that comes with a spark arrestor or not. The 2R Racing would be $50. How does the 2R perform do you think compared to going the 250R route? I ride mostly trails and am on the throttle bottom to mid end (hardly at all in the top end). Recommendations? Comments? Would I have to rejet if I went with the 2R route? I just rejetted from stock to 155 main + 42 pilot and moved the clip to 5 down position (haven't tested it yet).