COLIN 247 this sounds like the same problem we are all having the selector is full of crap it needs to move forward and up and down to be able to select gears. when i did mine all i did was remove water bottle, battery, support the gearbox with axle stands take out battery tray then you can get access to the selector disconnect the cables, note which went where, undo bolts securing the selector onto the gearbox one or two where tricky to get to , remove selector and spray all around the mechanism moving the links which should start to free and move up and down , took a good 30 mins or so to free it for me and getting it moving freely then its just a case of reassembling it all, good luck