ah i SEE - NO REPLIES- MAYBE THATS BECAUSE iTS THE SPEEDO THAT IS WRONG AND NOT THE ENGINE HAHA- I TESTED THE BIKES SPEED AGAINST A CAR AN FOUND OUT MY SPEEDO IS INCORRECT- SEEMS WHEN MY BATERY WENT DEAD THE COMPUTER SYSTEM ON MY DIGITAL SPEEDO RESTE ITSELF INCORRECTLY. ANYHOW, ITS GOOD TO DISCOVER FOR MYSELF WHAT THE PROBLEM WAS. THE BIKES IS DOING 65MPH ALMOST FULL WELLIE SO ITS FINE.