I have an atc70 with some carb issues. The choke lever is broken, and the choke is all wabbly and doesn't stay in place. Making it run bad. The petcock doesn't stop gas from flowing through, and the O ring on the petcock leaks gas al over the engine. The carb is nasty inside, un-cleanable. Should I buy a Chinese carb? They are only $25 on eBay, they look fine. The petcock is on the correct side. It seems like it would be worth it, cause my carb is crap. Should I get one? Or just try to fix the problems with my carb?