Package include: 
1* CDH67 Chromed Expansion Chamber
1* High Hole Window Piston kit 60cc/80cc
1* G2 Reed Valve Kit
1* High Performance Racing Carburetor
1* CNC Made Racing Cylinder Head 5.5cc-Round Type/Silver

CDH67 Muffler
66cc/80cc Window Piston Kit

Please be careful when you install the clips, here is youtube video link about how to install clips for your reference 

https://www.youtube.com/shorts/iZlvsQEecNc


  • The windowed 66cc piston kit is only for 80cc/66cc engine kits
  • High Hole Piston; compatible with long connecting rod ONLY;
  • DOSE NOT WORK WITH stocked manifold intake,Buyers must use high performance intake;
  • Work only with better performance manifold intake such as G2 reed,dio reed etc and better performance carburetor such as RT carburetor, CNS carburetor or other ones

The CDHPOWER WINDOWED PISTON kits includes:
  • 66cc/80cc high hole window piston
  • piston ring set
  • piston retaining clips
  • piston pin
High Performance Carburetor
  • Required on 19mm manifold intake
CNC Made Racing Head

  • Higher Performance Racing head for 2 stroke kit 80cc/66cc
  • Capacity: 5.5c
  • Fully CNC machine made; 
  • Alum Design
  • The racing cylinder head increases the horse power of your 80cc / 66cc 2-Stroke Bicycle Engine and this greatly cools off the engine. 
  • Would result better performance and longer life for your 2 Stroke Bicycle Engine.
  • Not for 2 stroke cycle gas engine motor kit 48cc/50cc;