well from ride reviews it sounds like the 04/05crf cam is going to take them all down..........and if sparks switched to the 05 cam theres something there....(could it be more power.. :ermm: )
i called sparks when i first got my trx and they told me to use the 02 crf cam.but for drag racing that cam did not cut it..
..cost me $250 too.......costly mistake.
i raced a guy with a sparks cam and 13.8 piston 2weeks ago.....and beat him by 2 bikes two times on pavement.
with his compression i thought he would win.........guess the hrc is the best for dragging.
this could of had something to do with it also
me 15/39 on 18"tires
him 14/38 on 20" stock