I have an 03 RMK 800 factory except for slp pipe set up. I was riding my brothers Artic Cat MC 800 and his is stock at 60 mph you can crack the throttle and take off. This RMK will get close to 100 mph but from 60mph to 100 takes forever. Do I start changing helix's and spring's or gears? Would like to get more torque at higher speed's I guess ANY ANSWERS will help !!!