With 125cc and 6 speeds you will need motorcycle grade tyres and brakes. 80+ mph would not be out of the question.
The CZ / JAWA motors from eastern europe have quality that far exceeds the HT crap from china. They (eastern europeans) basicaly invented racing 2 strokes in the 50's, then sold and/or lost their technology to the ****, with many engineers moving to Suzuki and Yamaha in the early sixties.
To say a Jawa or CZ design is crap or similar to chinese production is a misguided statement as that is where modern 2 stroke designs originate.
Last edited by wildemere; 06-21-2010 at 02:53 AM.