I also recommend that most times, you should have the base plate re-bushed. Most quads that are due for an overhaul also have worn base plates where the thottle shaft goes through them. They drill out the aluminum bores and press in brass bushings. If this area is worn, a wonderful vacuum leak occurs. Usually runs about $50 at a speed shop or carb shop. Well worth the money. And I agree with truck6driver, get a good manual. Good luck, they aren't that bad. Lou~