shuntting/shaving nosie when bike is moving?

[Michael]

hi i have a 98 Yamaha thundercat 600r it has bout 39000 on the clock. i have noticed there is like a shunting/shaving Noise when bike is moving and engine is running this dus not happen when the bike is stood still cant think what it cud be
need some help any one have any ideas what it might be

 

[Timbo is here]

Brake caliper sticking and letting pads run on disc too hard.

 

[Tim H]

bearing or axle damage is a possibility