So I bought a new throttle cable, throttle return spring and brakes for my son's new Doodle. He's really into it. Awesome. Now eventually I am going to upgrade the motor and stuff to get him going faster and have more fun, but for now during his learning experience I'm going to keep it stock because it seem to be a good suit for him. However, being I bought it used I'd like to make sure I'm squeezing out every drop I can get out of it. Can anyone point me to any kind of info or tutorial on how to optimize the stock 97cc motor, carburetor, clutch, chain, etc. for maximum performance? I'm still new and I'm soaking it all in right now. I want to make sure everything is proper and the best it could be. Thanks!