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Jackshaft Kit - Free Shipping Use your existing gears to increase the performance and top velocity of your motorized bicycle. This kit will bolt onto your bicycle frame, motor, and will connect directly to the bicycle gear shaft system other than using a separate sprocket. Free Priority Shipping within the US only. Delivery within 2-3 business days after the package has been shipped out. Get Free Shipping! - Spend $25 or more on anything and get free shipping on the parts in your order. Shipping charges will still apply to items from other categories. Our gasoline operated products are NOT compliant with Environmental Protection Agency ( E.P.A. ) or California Air Resources Board (C.A.R.B) for the use on/off Public roads. Upon purchase, the buyer agrees to use products for racing (closed-course competition) only and NOT for on/off public roads