I have a rocketa 250 that is water cooled and is a pushrods engine. I need a head for it. How do I tell if it is a loncin or zongshen or what motor is on this? I have fou d heads for what they call a cg motor, watercooled, but my head has four water jackets and these have two or six none I have fou f has four. I think it is a 05 model. It has manual clutch, and a 5 speed I think may just be 4. There is a casting mark on the head that is a diamond and on the inside is the letters ZT.