I just finished messing with the rear wheel got it as centered as possible and added a washer to the axle on the engine chain side to move the frame further from the chain. I can push my chain up about 1 1/2" inches now so by straightening my wheel out I got more slack in the chain again

I ordered one of those spring loaded tensioners since the one that came with my kit never road in line with my chain and was always putting pressure on the side of the chain. Painted the frame with a silver sharpie so it doesn't rust too. At least this hobby gives me little projects to do all the time