I'm not sure how to put this.  This 180cc big bore kit along with our free-flow exhaust and EJK fuel controller makes crazy power.  We have already seen numbers in the 16.5HP range.  Stock is 9...     It is freaking amazing the potential this engine has with 4 valves, EFI, and variable valve timing.  
The downside is that the cylinder is not designed for this engine configuration and requires getting a little creative to make the install work.  It is not for beginners or dealerships.  This kit is for experienced installers and tuners only.  Please read the install notes and check out the photos.  We will be glad to provide our EJK tuning configuration.