I'm not sure if the attachment worked but it's a picture of the Puch i'm going to paint and tune. I've been reading some forums and came across something about ZA50s and how the ones with black tranny covers were built with high performance clutches and roller bearing crank. Does mine have one? It's the black cover thing with the Puch logo on it right? And if so could i use a powerful kit on the engine? Thanks.