There is GAP between block and CDH cylinder, buyers need glue the gap by themselves in order to seal; The glue need to be high temperature resistant more than 220 degrees.

     Attention: The hole of alum block DOSE NOT match well with the intake port of cylinder

   - Compatible with CDH OKO PWK28MM Carburetor and CDH Maikuni PWK28MM Carburetor

    - DIY Dio Reed valve and Cylinder Combo;Inner Dia of Intake to Carburetor:1.26inch

    - A little porting on the intake side only;fully 100% CNC machine processing on cylinder and block;

    - 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.

Product description

Dio Reed Valve and CDHPOWER cylinder setup for 48cc/66cc/80cc;
CDHPOWER Cylinder is ported a little by machine on the side of intake;
Block made by CNC machine 100%;

Comment:

There is GAP between block and CDH cylinder,buyers need buy glue and glue the gap by themselves;


Kindly note:
If you want your motor with this dio reed valve kit assembled more power and more fast, you need do something by yourself.these are good suggestions from our buyers 
Firstly, chang 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 ,,,, then the absolutely screem 
Thirdly:if you know how to port the piston and make it be window sleeve piston, it will absolutely make engine more power and fast.

Thank you for looking, if you have any questions, feel free to ask and I will do my best to get back to you promptly!

Products usually shipped on the second business day and you will receive message of tracking ID.