Having had a new rear bevel drive last July, due to the Dealer washing the bike with a little to much vigour and left the cleaner on, which resulted in the paint crazing, quickest option was a new drive even thought they only wanted to new case it, I have not done to many miles since and have had a vibration from the back end when on tick over, so been having a feel about and the bolt for the Paralever was loose and the rear wheel has about 2mm of play at the most, but when I spin the wheel it feels rough like it is gritty, now I’m not to sure but if this was the lads Mountain Bike I would replace the bearings is this an OK feel with the back end 

