Boyesen Quick Start Accelerator Pump Cover

• The most effective way to add performance to a Keihin FCR carburetor
• Integrated Hot Start Assist eliminates problem 4-stroke hot start procedure
• Tunable leak jet maximizes volume of fuel and duration of fuel spray for all conditions
• 25 percent more fuel capacity
• High-volume vertical check valve located in the QS3 for precise, consistent fuel metering
• Patented design stops bogging and improves throttle response
• Improved low-end performance
• Investment cast and finished to precise tolerances
• Fits ALL Keihin FCR carbs
• Simple bolt-on installation

Fitment:

Honda
CRF150R • 2007-2009, 2012-2020
CRF250R • 2004-2009
CRF250X 2004-2009, 2012-2013, 2015-2017
CRF450R 2002-2008
CRF450X 2005-2009, 2012-2014

Kawasaki
KLX450R • 2008-2009
KX250F 2004-2010
KX450F 2006-2008

Suzuki
RM-Z250 • 2004-2009
RM-Z450 2005-2007

Yamaha
WR250F • 2001-2009, 2011-2013
WR400F • 1998-2000
WR426F 2001-2002
WR450F 2003-2009, 2011
YZ426F 2001-2002