This has probably been said a thousand times, but I've got a vibration in the Sporty I can't track down.

The vibration comes in around 80 km/h and stays until 90 then goes away. Take her up to 110 km/h and she's smooth as silk. Or run it hard up through the gears and it s fine, it's just that 80-90 area in top gear.

Wheels are balanced, everything is tight, it's got me buggered.

Anything else I should be checking?

Ur lucky mine vibrates all the time. Tried using a gopro and as long as you nod continuously while watching it back its fine...lol

But seriously at around 80 k's in top gear mine is the same once the revs pick up its fine. If you still get it in 4th then maybe there is a problem. Mines a 2104 XL120CA so pretty much the same bike.