Perhaps you have heard about that PRD was developing new engine with power valve from some time ago.
Now, it comes to be real.
Please kindly see the flyer.You are going to see a modern engine we named it " Galaxy".

For some information it is 32Hp and also has the one piece exhaust system.
More details about the engine, PRD.RK125W.GALAXY, please refer to the engine spec sheet.
http://www.fushing.com/go-kart-engines/rk125w-galaxy.html
Try it! Win the Race!