Description:

This diaphragm operates the carburetor accelerator pump circuit. When the throttle linkage actuates the pump, it displaces fuel to provide a brief enrichment shot during throttle opening. A hardened, torn or leaking diaphragm can cause hesitation and may leak fuel, depending on the carburetor design.

Replaces OEM #16021-393-004

• Operates the carburetor accelerator pump circuit
• Helps provide the enrichment fuel shot during throttle opening
• Inspect the pump cover, spring and passages during installation

Fits

• 1982 Honda XL500R
• 1982-1983 Honda XL250R
• 1983 Honda CM450E