How to Adjust the Pilot Screw on a Yamaha Raptor 50?

Answer The carburetor used by Yamaha's Raptor 50 all-terrain vehicle relies on a constant flow of air to draw fuel into the engine. An adjustable pilot screw controls the carburetor's pilot system, which ... Read More »

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How to Adjust the Valves on the Yamaha Raptor 700?

Periodic maintenance of your Yamaha Raptor 700 or 700R includes adjusting the valves for maximum engine performance and fuel efficiency. Possibly the most time-consuming part of the job is removing... Read More »

How to Adjust the Drive Chain for a 2003 Yamaha Raptor ATV?

Your 2003 Yamaha Raptor 660 uses a motorcycle-type drive chain to transmit power from the engine to the ATV's rear wheels, allowing off-road ATV racers to quickly alter the machine's gearing to sui... Read More »

How to Adjust a Carburetor Pilot Screw?

The pilot screw on a carburetor sets how much fuel/air mixture goes into the engine. If your engine is running poorly, or if you have a bad idle, you can adjust the pilot screw to get your car runn... Read More »

How do I Adjust the Fuel Screw for a Yamaha WR450F?

The Yamaha WR 450-F is a 449-cc liquid cooled four-stroke motocross dirt bike. On the lower right side of its carburetor is an adjustable air screw, which controls the gas-air mixture. The bike own... Read More »