the motor help

[TRX520RIDER]

need help hopping up my 2005 450r motor plz help be as specific as possible thank you !

[OKTRX450R]

HRC Kit or HCII cam and drill out breather T.
Baldwin 14:1 Piston.
Port/Polish head, KW valves, KW springs.
Rossier, Pulse Charger, or Ron Wood exhaust.
DD Intake, Ron Wood Intake, or DASA Intake.
CRF Ignition conversion or Trail Tech -4 flywheel and Dyna CDI.
Race Gas.
Also consider CRF carb...

If the head work is good you should be over 50 HP...all for about $2300-$3000.

[TRX520RIDER]

you have any idea the top speed?