The Throttle Valve (slide) affects the air-fuel mixture ratio between 1/8 and 1/2 throttle, and especially between 1/8 and 1/4 throttle. Throttle Valves come in various sizes called cutaway. The larger the cutaway (size), the leaner the fuel mixture. The smaller the cutaway (size), the richer the mixture. Think funnel for the air to aim across the needle jet. Throttle Vavles are sold each. |
