Thanks for the help mate. Much appreciated
1. If the tensioner is the plastic wheel that feeds the chain into the back wheel gear. The bike wont work unless the chain is fed under that wheel. Im guessing if I adjusted that wheel upwards To create tension in the chain it would work. since that`s why it needs to be fed under(to create enough tension in the chain so it doesn`t fall off). INGENIUS!!
4. Yes, the Aircleaner( looks like some kind of sponge, in the plastic air intake on the carb.) Floods with gas along with the entire carb. Then leaks out after riding. You are completely right sir.