Boyesen Quickshot 3 Accelerator Pump Cover- Keihin Fcr Carburetor

Stock accelerator pump covers permit only a 60% - 70% fuel charge in the pump chamber. turn the throttle and air trapped in the chamber is compressed disrupting fuel delivery. all the while tuning the squirt means a complicated change of the leak jet. the result: hesitation, bog and a tuning headache. the patented boyesen quickshot 3's triple effect: (1) completely fills the pump chamber with fuel (2) eliminates troublesome air and (3) provides an adjustable leak jet circuit for simple hand tuning. the result: the ultimate in adjustable fuel injection. tunable leak jet maximizes volume of fuel and duration of squirt for all conditions. investment-cast and finished to precise tolerances. 25% more fuel capacity. 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.