I am looking for a new cylinder and piston for a 1980 Honda Express NC50. I would also be interesting in knowing if anyplace on the web sells aftermarket cylinders (50cc) or kits for the honda expresses. It seems that there are lots of 70cc kits out there for much cheaper than a new 50cc set from an oem dealer?! I dont want to deal with new jetting, etc, so am looking for a 50cc source. Thanks.