thanks fir the advice so far. Having Spoken to Kawasaki Bolton we think it might be the needle bearings between the drive shaft and the engine, but only having done 12500 in 2 years is this a common fault, the bike is just out of warranty.
The wheel bearings are fine, the noise is not that far back, suggested I change both settings of bearings in the drive drive.
The wheel bearings are fine, the noise is not that far back, suggested I change both settings of bearings in the drive drive.