THIS IS A 18 TOOTH 420 PITCH SPROCKET TO FIT 17mm ENGINE SHAFT. BIGGER FRONT SPROCKET ADDS SPEED IN EACH GEAR AND MORE TOP SPEED. I ALSO HAVE 428 20mm SPLINE SPROCKETS LISTED. PLEASE CHECK ALL DIMENSIONS PRIOR TO PURCHASE AS REFUNDS ARE NOT GIVEN ON PP. SPROCKET PITCH CALCULATION (JUST MEASURE YOUR SPROCKET THICKNESS). 6mm THICK = 420 PITCH. 7mm THICK = 428 PITCH Visit our ebay shop and look through our large range of spares, we also sell new Pit Bikes.Click Here To Visit Our Shop ORDER BEFORE 2PM TUESDAY TO FRIDAY AND BEFORE 12 MIDDAY ON MONDAYS OR AFTER BANK HOLIDAYS FOR SAME DAY DISPATCH DELIVERY WILL BE WITHIN THE TIME FRAME OF THE DELIVERY OPTION CHOSEN. WE ONLY DISPATCH ORDERS MONDAY TO FRIDAY. YOU CAN CALL OUR CUSTOMER SERVICES TEAM ON 01789 766777 MONDAY TO FRIDAY 9am to.
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