I removed the exhaust baffle and was very pleased with the performance improvement. Problem is it is loud and neighbors complain when I crank her late night. I cut 1/2 the stem off of the stock baffle and re-inserted. It runs good and is still quiet. Also stalls less off-bottom. Loses some power at mid and high range, but for neighborhood runs, night runs, and nighttime park rides, it's stealthy.