
QuadBoss · New
QuadBoss 04-09 Yamaha YFZ450 Accelerator Pump Kit
MPN 420597 · Store SKU qbs420597
Supplier stock checked 11/7/2026, 1:31:45 PM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
Improperly functioning accelerator pumps can cause poor performance and bogging during acceleration. The Accelerator Pump Kit from QuadBoss® includes all O-rings, diaphragm, spring and screws necessary to rebuild one accelerator pump circuit. QuadBoss 420597 Carburetor Accelerator Pump Kit
Manufacturer fitment & guides
Check 420597 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.