That can be explained here, but I would highly recommend that you find a club and an instructor to run the engine with you. Then you can see firsthand what everything does. Also Fox engines are more finicky than most. That doesn't mean that it will not run good when it is set up right, it just might take a little while to get there. They also need more break in than most, Fox always says to add a little extra castor oil to their engines. When it is broke in and set right it will be a screamer.