Compatible with CDH OKO PWK28MM Carburetor and CDH Maikuni PWK28MM Carburetor
DIY Dio Reed valve Cylinder ONLY;
no porting on both side,buyers have to do port by themself;fully 100% CNC machine processing on block;
there is GAP between block and CDH cylinder,buyers need glue the gap by themselves in order to seal;
if you want motor with this dio reed valve kit assembled more power and more fast, need do something by yourself.good suggestions:Firstly,change stock head to CNC racing head;secondly:port the other ports , like the transfer ports , and exhaust ports, and use a expansion chamber exhaust system , if you also jet the bigger carburetor such as a keinin 17 or 20 millimeter dirt bike carb,Thirdly know how to port the piston and make it be window sleeve piston,absolutely make engine more power fast.
