Hi I have just received a new clutch torque drive for gilera dna 50. I now realise that the old clutch pulleys are considerably bigger. The new pulleys are about 117mm and match the clutch bell and variator whereas the old one had 135mm pulleys?! (Stuck out wider than the bell) Which is the right size for the scooter? Is the old large one for a 125cc maybe or have I been sent the wrong new torque drive? It seems the belt will ride right up on the pulley edge which worries me (825mm belt) Is a larger pulley better or will it make no difference? Thanks