i have a 2005 trx450r with jetkit and yoshimura full system i was woundering what other mods i could do to get performance without taring into the motor.

 

HRC kit. A cam isn't really "tearing into the motor" like doing a piston or something like that.......

 

Did you open up the airbox? Either remove the lid or do the HRC cut on it?
A cam will make a big difference and it's easy to do yourself.

 

Highly recommend EHS Racing airbox lid with Outerwears cover....

 

yea i took the lid off

 

Did you get a different filter? I went with a Uni.
Where do you ride mostly? If you ride trails you will want a 13 tooth front sprocket.
I also have a Hotcams Stage II, I had the head ported and polished and I have an Athena 480 kit.
I have a full Yosh system like yours.