Hi all, I’m keen for a bit of help solving a sound issue with my 2012 650. The bike has a Speed-related and rhythmic vibration or grinding sound in 5th gear at about 70km/hr and 6th gear at about 110km/hr. I haven't noticed anything in the other gears. Would this then be a gearbox issue?
- I’ve done 30km.
- The chain and sprockets are new, well lubed and looser than spec.
- The front sprocket was tightened without a torque wrench.
- No recent change in milage
- I've done the last two services myself.