On CV carburetors the diaphragm is what lifts the slide as engine vacuum rises, and over the years it dries out, stiffens, and develops pinholes. A failed diaphragm causes a flat spot, a hanging slide, and poor throttle response. A fresh diaphragm restores smooth, responsive pickup. Handle it gently and seat it carefully during assembly.

• Lifts the slide smoothly under vacuum
• Cures flat spots and a hanging throttle
• Fits CV-type carbs, confirm before ordering

Fits

• 2002-2003 Honda VTX1800R
• 2004-2007 Honda VTX1800R1
• 2004-2007 Honda VTX1800R2