I am sure my Frame can handle the power, my main concern is the rear wheel and mainly the spokes. I found a rear wheel that uses 12ga spokes and 2.125 wide steel rim and hub is free wheel type. I must admit, I do like the rag joint mounting type if you can get a hub that is tight against the sprocket hole so it pinches it and centers it. This shares in the friction along with the spokes when power is applied. I have done over 300 installs using this method and I like it a lot for bicycles. Now that I am going from 3hp to 9hp or there about, I really think that the 12 ga spoke rear wheel is looking good. Keep in mind this 9hp GP50 is a 2 stroke and the 9hp is the rate and not the torque. I will keep my rear sprocket smallish to keep torque down as to not tear up my wheel as I am sure this 9hp has some torque to it. The 4 stroke Titans have good torque and never had any problems using quality wheels with 14ga spokes at speeds up to 48mph or more. But with the hp this GP50 has and running a smaller sprocket, I am sure the torque will be good and the speed number will be off the chart for a bicycle. I am guessing 50-60 mph. I have found that once you get above 40-45 mph, wheel balance plays a big factor in rider safety. I will order this 12ga 26 inch super duty wheel . Until it arrives, I will work on mounting the motor to the frame. I have enough tools and welders to make it happen. The Build will begin in earnest tomorrow. Enjoy the ride..