Modifying a Super 73 with a 212cc Engine: Power and Range Upgrade
Our Super 73 stopped working so we took it to our local repair shop. They were nice enough to give a loaner bike however after having our bike for a few months, they returned it broken telling us Super 73 no longer supported this model (Super 73 Z1) and therefore couldn't get the parts to fix it. We weren't sure what to do with the bike and eventually decided to 212 swap it.
Some of the swap parts can be found at www.affordablegokarts.com