Thanks robbo and to start with every thing works fine im just not sure if its changing down to 1st at all, just sounds like its in 2nd. I thought it might have been a stripped gear so i bravely took it apart earlier and everything is fine inside no teeth stripped or anything. The only thing was that the clutch hub was a tiny bit loose and the spring under the adjustment grub screw is a bit bent apart from that it looks brand new so i imagine it was just the hub. If thats not the case ill have a look at the other things that you mentioned and see if i can find a solution