A
must for all four strokes using the Keihin FCR carb. To get the best
throttle response from your engine you must properly adjust
the low speed fuel mixture screw. Due to the difficulty of adjusting
the stock screw SRP has designed a billet extended fuel
mixture screw that can be adjusted by hand. Manufactured to the exact tolerances of the stock screw
with a built in thumb wheel for easy adjustments.
