Thanks for the advice, maybe I'll try an nt carb on it, the strange thing about this engine though is the intake manifold is 90 degrees. Exhaust and intake are on the same side of the engine, so the carb is underneath the muffler. It looks to me like it would be easier to replace the manifold as well because the motor bicycles use a different method of connecting the carburetor to the manifold.
I removed the governor in my 3hp tecumseh and when you keep it at full throttle, and then let off the gas it doesnt like to slow down, I have to use the brake before the engine will stop revving so high. I think ill keep the governor on this bike.
The other strange thing about this engine is that it can idle extremely low, slower than any other engine i've seen. Maybe its the OHV? Ill make a video of it running when it has a gas tank.