I have an '06 WR 450 Planned mods are as follows : The basics to make it breath right , AIS Removal , Re-Jet , New Pipe , Grey wire and air filter. I was wondering if a rear sprocket change would be another good small mod , and change. Like not any teeth up or down , just different material ? Any other small mods I missed would be great also. I am doing all this not this but next weekend. ( Well the shop is doing it , since I am a hack ). Thanks guys.