Just picked up an 04 200sx. Always wanted to try one of these. Anyway, I haven't ridden it on the track yet, but riding around the house, I noticed it kinda like riding a 125 with some grunt, but once the bike hits the main jet, holy $hit, more likes 250. Anyway to smooth the power out? Also, gonna ride this bike on the trails, so I need a spark arrestor. Anyone know if an insert is available?