Flying Horse 2-Stroke Motorized Bicycle Universal Mounting Bracket &ndash; Gas Bike U Mount Upgrade The Universal Mounting Bracket will secure your 48cc or 66/80cc 2-stroke bicycle engine kit to your bicycle frame without the need for drilling in to your frame Installation is simple: remove your front motor mount, install the plate in its place and set the plate on to the frame. Put the bolt underneath the frame up through the plate so the u-bolt wraps around the frame, then clamp fasten the nuts for the bolt and you're ready to ride This mount has a mounting plate and a u-bolt for better hold on your frame Universal mount fits frame tubes around 1-3/4" in diameter