MOTORCYCLE RAD VALVE 1991 Arctic Cat Jag 440 AFS LT The larger diameter of this

The larger diameter of this pulley allows one to have a greater velocity-ratio range compared to the original pulley that has a notably smaller external diameter

2013 Arctic Cat F 800 SnoPro 129"

tighter fit over stock set-up

Connecting rods include graded bearings in the big end to ensure proper clearance

They are CNC precision machined and allow for the use any of our Mika Handelbars

MOTORCYCLE RAD VALVE 1991 Arctic Cat Jag 440 AFS LT The larger diameter of thisBOYESEN engineers embarked on a mission to create a new lineage of aerodynamic intake technology by refining the primary performance factors required to increase peak horsepower through design innovation: Aerodynamic Surface Optimization, Model Specific Reed Petal Tensioning, Material Fuel Resistance, and Multi Stage Reed Timing. Together, these innovations create a new technological benchmark in intake performance. Boyesen Engineering would like to