How to tell the difference between 49 and 66cc?
Hey guys, I just got a motorized bike engine and I do not know if it is 49 or 66cc. Is there a way I can tell without taking it apart (head nut size for instance)? Also, I heard that to take the engine head off, I need a tool called a torque wrench. Is this right, or can I use a regular socket wrench? Thanks