The fuel problem is resolved with the fuel pump. Runs MUCH smoother now and doesnt just turn off anymore. After I switched the hoses, it worked right away and I could go for the first test drive. The chain still jumps off but after grinding the JS out sprocket, I will need to get a #40 chain tomorrow and that should resolve the problem. I am having problems getting it aligned perfectly because of the 3inch tires.
I am now using a gear ratio of 5.000 somehing (12-15-10-44) because the 22t sprocket was very low quality and wasnt sitting tight at all and the only other one I had here was 15t. Absolutely no problems to get it to take off. Incredible torque. Its going about 15-20mph only in idle rpm range. I cant imagine what happens if I actually pull the throttle more than just 5%
Im actually even a little worried that everything gets ripped apart by the power of the engine haha.
WEll lets see what I can do tomorrow. I might have to build something like a piece of tube before the sprocket to prevent it from jumping off too but maybe the #40 resolves the problem - the #41 is simply too wide.
Edit: Today I got a bmw chain from a friends bike store. I wonder if it would work too torque wise..