heres my problem, I got my bike running all good except when i try to open her up and go faster it basically maxes out half speed. I know the motor is capable of going way faster, cause i had it going faster before. checked my throttle cable and and carb and all that and it all looks good. What else could be the cause of something like this? I just want to be able to keep up with buddy and his bike. i put the new iridium sparkplug in there and even went the extra mile and took off my tensioner, i just shortened my chain and it works even better. Please if you have any suggestions i would be much appreciated.