RE: Quality? Zenoah VS. CY
The biggest difference is CY has always been a bit of a crap shoot when it comes to cylinder plating. Zen has not had that problem. IMO, both of them could have better quality---but the plating is pretty importent, so for overall quality, I have to give it up to Zen. Keep in mind, there are many people that are satisfied with their bigger CY engines, and only CY offers stroked cranks and bigger than 34mm bore cylinders.