Re: 08 R6 start but won’t move
It's in neutral. This has nothing to do with the sprockets/chain.
The gears aren't engaging. Check clutch (make sure the friction point isn't set too close to the bar), check clutch line all the way to the engine block, making sure it is not loose which would indicate the wire is broken or just adjusted too loose. Check your gear shifter, make sure it's actually engaged to the teeth on the part that sticks out of the engine (I forget what the part is called). You should hear and feel a clunk when a gear is engaged.