Purchased a 2010 Roadsport SV with Sigma engine and 5 speed box at the weekend. On the 140 mile journey home it became apparent there is a slight issue with the gearbox. It changes from 1st to 2nd with no problem at all, but changing down to 2nd from any gear is very problematic, especially at higher revs. Is this a common problem, has anyone experienced it before? Many thanks for your thoughts. Giles