Hi,

the Spec.3 has completely new timing for the inlet, exhaust ands transfers aswell as a new carburetor. 8+1 ports instead of 6+1 (Spec.2) and 3+1 (Spec.2).

The Spec.3 is available as Pullstart version or "Truggy" version. Truggy version features a normal backplate instead of the Pullstart and a thermal protected carburetor. You will need a starter box for the Truggy version though.

Best regards,
Andy