Up for sale is BOYESEN 1998-2000 WR400F Yamaha QUICKSHOT 3 ACCELERATOR PUMP COVER- KEIHIN FCR CARBURETOR. The vendor part number is APC-3. Please read the title to know what is for sale Boyesen Engineering has now introduced the NEW QuickShot 3. This bolt-on performance accelerator pump cover eliminates bog, improves throttle response and offers hassle free leak jet circuit tuning. Currently available for ALL Keihin FCR carbureted MX, Offroad and ATV models. This patented 3rd generation QuickShot features an innovative triple effect that: 1 - Completely fills the pump chamber with fuel, 2 - Eliminates all trapped air from the system and 3 - Provides an adjustable leak jet circuit for quick hand tuning. Together with the Boyesen unconditional guarantee, the QS3 simply delivers unmatched results.

• �The ultimate in adjustable fuel injection�
• Tunable leak jet circuit maximizes volume of fuel and duration of fuel spray for any condition
• Investment cast and finished to precise tolerances
• High volume vertical check valve located in the QS3 for precise, consistent fuel metering
• Stops hesitation and bog
• Instant throttle response
• Improved low end performance
• Fits ALL Keihin FCR carbs
• Simple bolt-on