by Old Dog » Fri Oct 01, 2010 10:25 am
I will wager that it is not the switch that is leaking - a little plumber's tape is all you need there. Beside (next to) the switch there is tin plug part of the casting process. Burwins in the UK sell a turned alloy version which replace it. You then need to use a little araldite to make the seal good. Probably best to lay the bike over and degrease first. Also be sure that it is not weeping from behind the generator ie: that your crank seal isn't leaking.
Well good luck and let us know how you get on. My fix is still a good 'un after over seven years
All the best
Old Dog
He hath no grave, is covered with the sky and the way to heaven out of all places is like in length and distance