Carmen Santiago bka " Electra Amsterdam features a fat assed internal rear hub. I am having problems keeping cost down I brought a 16 GA plate and will have it welded by my co workers at my job... The problem at hand is the hubs to fat to fit a standard sprocket 80t wheel sprocket without a car tire wheel spacer. Anyone here ever use a drum hub sprocket for a go kart to mount on the rear axle? This would make up the difference in offsetting the engine so the motors centered as well. Rear axle is about 3 to 4 inches wide around the plate on the opposite side.