Flying Horse 48cc/66cc/80cc 2-Stroke Motorized Bicycle Engine Universal T Bracket Engine Mount &ndash; Gas Bike Installation Mounting Bracket The Universal T Bracket helps keep your 2-stroke 48cc or 66/80cc motorized bicycle engine secure to your bike frame Installation will require drilling in to your frame: after drilling the port for your front motor mount (t-bracket bolt), mount the bracket plate up to your motor mount bolts, and fasten them in to the bracket. With the bolt in the frame, turn the nut at the bottom of the bolt up to your frame snug to assure the motor will not move while operational Note: T-brackets can weaken your frame by requiring to drill in to the bicycle