As far as pipes I don't believe anyone makes them but your best bet on that would be Hot Seat Perf as far as reeds this is not your conventional reedvalve motor as the reeds are between the case and the head "reed valve assist" .As far as the air box the box was tuned for the aplication and removing it would not gain much.The 02 prox fan has been reported to be much quicker out of the box than a well tuned and clutched 01.Make sure it has the updated CDI or you will be putting pistons in it garenteed.
GOOD LUCK
.......SNORAT......