- Includes diaphragm, spring, O-rings and related small parts needed to rebuild the accelerator pump circuit (components may vary by application).
- Direct-fit replacement engineered for specific Polaris and Honda TRX ATV models for reliable performance and easy installation
- Restores proper accelerator pump function for crisp throttle response and reduced bogging on acceleration
The QuadBoss Accelerator Pump Kit, model 420597, is designed to rebuild one accelerator pump circuit on specified Yamaha YFZ450 ATV applications. An improperly functioning accelerator pump can contribute to poor performance and bogging during acceleration. This kit helps restore proper accelerator pump function for improved throttle response and reduced acceleration bogging.
The kit includes a diaphragm, spring, O-rings and related small parts needed to rebuild the accelerator pump circuit. Components may vary by application. It is a direct-fit replacement engineered for the specified Yamaha YFZ450 models, supporting straightforward installation when servicing the accelerator pump system.
This QuadBoss kit fits 2004, 2005, 2006, 2007, 2008 and 2009 Yamaha YFZ450 models. The manufacturer part number is 420597. QuadBoss is the brand and vendor part number is 420597.
Features:
- Rebuild Kit: Includes a diaphragm, spring, O-rings and related small parts needed to rebuild one accelerator pump circuit; components may vary by application.
- Direct-Fit Replacement: Engineered for specified Yamaha YFZ450 ATV applications.
- Restored Function: Helps restore proper accelerator pump operation for crisp throttle response and reduced bogging during acceleration.
- Fitment: Fits 2004–2009 Yamaha YFZ450 models.
- Part Numbers: Manufacturer and vendor part number 420597.
Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: N/A
Regular Stock: t
Units Per Sku: 1
Fitment:
2004 Yamaha YFZ450 Base
2005 Yamaha YFZ450 Base
2006 Yamaha YFZ450 Base
2007 Yamaha YFZ450 Base
2008 Yamaha YFZ450 Base
2009 Yamaha YFZ450 Base