FRONT SPROCKET WITH VARIETY OF TEETH LINE-UP AND REASONALBLE PROCE FOR BEST TUNING. LIGHTWEIGHT / HIGH DURABILITY S45C(HIGH CARBON STEEL) IS ADAPTED. LIGHTWEIGHT SPROCKET UNDER SPRING IS GOOD FOR FRICTION LOSS.

●INSPECT EVERY 1000 km AND EXCHANGE WHEN FOUND TAPERED. DAILY MAINTENANCE LIKE OIL LUBRICATING IS RECOMMENDED.
 
○420
※17T INTERFERES WITH CRANKCASE FOR MONKEY / CUB（50cc～90cc）ENGINE
※MAKE SURE OF THE CLEARANCE BETWEEN CHAIN AND CRANKCASE.
※WIDE CHAIN GUIDE PLATE IS REQUIRED WHNE INSTALLING 16T OR MORE ON MONKEY125 / GROM / MSX125. SPEEDOMETER DISPLAY ERRORS HAPPEN WHEN EXHANGING DIFFERENT TEETH.