Radiator and cooling options

Make damn sure you have the water pump pulley smaller than the crank pulley. The water pump MUST turn faster than the crank.

Good point! I looked at the pictures, and it appears smaller, but I will take some measurements and see. I have a couple other pulleys laying around off other motors. I will see what the pulley diameters look like and maybe try a smaller one. I still need to find a way to get a shroud on there though. Even if I have to make one and go back to mechanical.