go to
www.scootoz.com.au and find this guy cooper engine . read it . it states.....
With Several USA National Championships and numerous race wins on the books, the Guy Cooper designed CRIII with Xtreme Motor Company from the USA unleashes the latest in a long line of Class leading Production Pit Bikes with the Cooper Replica Stage III now available in Australia through Scootoz Agents. All of the class thumping features of the CRII and more. We started with the original Pit Pro CRII and honed the weapon to a razors edge ! Like the CRII, there are no mountain bike parts here, this is the real thing. The CRIII takes the class lead and leaves the competition further behind ! With a new 10:1 high compression engine design, high volume oil pump & alloy cylinder barrel with external oil cooler,
all i'm trying to do sell a top quality engine at 1/2 the price . any one thats intrested should go to the web site and read , or call any in the know and ask them .