Have googled VWF and motorcycling and what I'm finding leads me to think it's not this.
Most references seem to be to it being a symptom of big engined bikes with low handlebars, mine is a 250cc trail/enduro bike with saddle to bar rise not drop and it also seems to be more common in the right hand (as it has to hold on tighter to hold the throttle) and it's in my left hand.
Going to fit bar end weights anyway and maybe change to a softer compound grip (currently using Renthal Firms).
Have googled VWF and motorcycling and what I'm finding leads me to think it's not this.
Most references seem to be to it being a symptom of big engined bikes with low handlebars, mine is a 250cc trail/enduro bike with saddle to bar rise not drop and it also seems to be more common in the right hand (as it has to hold on tighter to hold the throttle) and it's in my left hand.
Going to fit bar end weights anyway and maybe change to a softer compound grip (currently using Renthal Firms).