I have made a set of internal vibe weights "Kev mod No? "...
aswell as heavy bar end weights from stainless...
Will also be trying sand in the lower section of the bars
& vibe reduceing hand grips... "Pro tapper pillow grips"
A set of steel bars... sure the alloy fat bars made it worse...

If that don't do it... I have a few diffrent grades of
urethane bar I could try makeing new handle bar clamp
rubbers to replace the yamaha ones...

I really need to sort this..A bike I can only ride 15mins
at a time an't much good...

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Harley Davidson..
The easyest way to turn gasoline into noise with out the side efect of horse power...