Vibrations are part and parcel of riding a big single cylinder...

I filled my handlebars with silicone which helped but didn't stop it. I dont have bar end weights either.

I assume you do have bar end weights?

A recent thread talked about changing the grips/re-positioning the bars and changing them to Renthals.

Have you physically gone round the bike checking/tightening all the bolts?

Kev has designed/made some extra bar endweights too..ALL available when you join the forum(if you havent already) and then buy his modificationcd/download.