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The accelerator pump adjustment screw plays a crucial role in the functioning of a carburetor, particularly in controlling the amount of fuel injected by the accelerator pump. This adjustment is essential for ensuring optimal performance and efficiency in the engine. In this article, we will delve into the intricacies of accelerator pump adjustment screws, focusing on popular brands such as Keihin and S&S Cycle, and providing detailed instructions on how to tune and adjust these components for optimal performance.
One of the cures is to decrease amount of fuel injected by the accelerator pump
Keihin Accelerator Pump Adjustment
Keihin is a renowned manufacturer of carburetors and fuel injection systems, known for their high-quality components and precision engineering. When it comes to adjusting the accelerator pump on a Keihin carburetor, it is essential to follow the manufacturer's guidelines for optimal performance.
To adjust the accelerator pump on a Keihin carburetor, locate the adjustment screw on the carburetor body. Using a flat-head screwdriver, carefully turn the adjustment screw clockwise to decrease the amount of fuel injected by the accelerator pump. This adjustment can help fine-tune the fuel delivery and improve throttle response.
S&S Cycle Adjustment Screws
S&S Cycle is another well-known manufacturer of performance motorcycle parts, including carburetors and fuel systems. When it comes to adjusting the accelerator pump on an S&S Cycle carburetor, the process is similar to that of a Keihin carburetor.
Locate the adjustment screw on the carburetor body and use a flat-head screwdriver to make the necessary adjustments. Turning the screw clockwise will decrease the amount of fuel injected by the accelerator pump, while turning it counterclockwise will increase fuel delivery. Fine-tuning this adjustment can help optimize engine performance and throttle response.
Keihin Accelerator Pump Tuning Instructions
For those looking to fine-tune the accelerator pump on a Keihin carburetor, following the manufacturer's tuning instructions is essential. Keihin provides detailed guidelines on how to adjust the accelerator pump for optimal performance.
Start by locating the adjustment screw on the carburetor body and using a flat-head screwdriver to make the necessary adjustments. Turning the screw clockwise will decrease fuel delivery, while turning it counterclockwise will increase fuel injection. It is crucial to make small adjustments and test the engine's performance after each adjustment to ensure optimal tuning.
S&S Motorcycle Pump Adjustment
When it comes to adjusting the accelerator pump on an S&S motorcycle carburetor, the process is similar to that of S&S Cycle carburetors. Locate the adjustment screw on the carburetor body and use a flat-head screwdriver to make the necessary adjustments.
The acc pump should start squirting fuel from the brass tube in the throat of the …
The screw pump has good self-priming capabilities, but it is necessary to avoid idling of the pump body, and it cannot exceed 30 seconds; the rotor pump can produce good self-priming capabilities when the speed is greater than 200rpm.
accelerator pump adjustment screw|s&s motorcycle pump adjustment