Took the frame in to school to clean it up more. Got home and decided to test fit the predator engine. It looks too big! It does fit in the frame, but I don't like the way it sticks out on the right side of the bike..the fan/flywheel cover is over too far. I think I will go back and get the 3.5 HP motor or just take my frame in to Harbor Freight and test fit the engine there... What do you all think?