Thanks all. Been out on it again today and its very prominent. Its very hard to record, identify and confirm when it happens. Seems to be in all gears and very frequent but not all the time.
Bike was new in march and I had DMR V12's fitted on collection, so these should be OK? I lubed the bike before going out but it still happened.
Thing is, I tried to listen closer and it seems to come from the front as though something is scraping against something but as I say its just hard to work out