RFX Pro Front Sprocket Yamaha YZ250 99-24 YZF400-450 98-24 Teeth:13 Certified as medical device:

Certified as medical device:

FE450 17-23

CRF450R 17-18

FE 450 14-16

RFX Pro Engine Timing Plug Set Kawasaki KXF250 11-19 KXF450 09-19 (Various Colours)

RFX Pro Front Sprocket Yamaha YZ250 99-24 YZF400-450 98-24 Teeth:13 Certified as medical device:RFX Pro Front Sprocket (Black Zinc)Yamaha YZ250 99 20 YZF400 450 98 20 RFX Pro Series Black Zinc Front Sprockets are CNC machined to the tightest tolerances from high tensile steel and case hardened to 60 Rockwell to resist wear and ensure longevity. Pro Series sprockets also feature lightening holes were necessary and self clearing mud grooves on both sides to resist dirt build up and help prolong sprocket and drive chain life. New for 2016 they come