tips and tricks for the trx90

[flees41]

my son will race his 2007 TRX90 in a box stock class. Wondering what I can do to get the most out of it. We can only change the jetting. I heard a little about the pink wire mod. Anything else ???

Thanks for any info

[miniquaddad90]

Very few options then... Can you eliminate the air box and run a pod filter? You can remove the choke butterfly to increase some flow but being stock it might make it a b**ch to start... other than that i can only think of a few other things but not sure if "legal" or how far you want to push your luck... Thinner head gasket, cam, port work, 14t front sproket, im out of ideas. Do they ever tear down motors in that class? MX or XC?