Are you useing redline oil.

I have just had the seals in the primary and gearbox renewed (last week) the main reason for doing it now, promptly, was that oil had the potential to get onto the belt and stuff that as well.....

Bt

hi, a lot of inner pri do leak a bit on 99 up  big twins  only slight   but a leak is a leak  ,as long  as the main pulley nut is tight  because that will cause a leak too  ? ,     belt dosn't get damp with oil & its not on the rear tyre , check the level reg ,a little bit of aleak  looks a lot but most of the time its ony  very minor ,