i would'nt worry about the bikers,
i would'nt worry about the bikers, most do a good enough job of killing themselves by riding like tits on the road, so venting won't hurt them.
as for the odd dribble on the filler neck try checking the overflow pipe underneath to see if that's wet, if it is you are leaking fuel onto the road (see bottom left corner by #14+15)
as i said check the pipe to see if it is causing any leaks
bear in mind that diagram has been the same for the last 8 years or so and shown on a majority models so it's only a generic picture and not that accurate
hopefully not a drop anywhere to be honest, probably won't sat still anyway but be nice to see if there is an overflow pipe anywhere under there
with 600 miles odd to a tank or whatever it's not like you won't be passing a fuel station at some point surely?
mind you is there any expansion to derv fuel ? and considering the extra weight carried affecting mpg anyway is it really a required 'must do'
i can only guess the differences in a real world situation would be negligble either way be it brimmed or filled twice apart from time and inconvenience wasted having to pull in a fuel station 100 miles early but then how many time would you do that in a lifetime anyway ?
mind you i don't brim the top of the kettle to get an extra cup of tea out of it myself either
fill it / click it / drive it
worx for me
lol you need a pay at pump! Is why I use it as otherwise I end up buying chocolate in the shop! I hardly ever fill up as my work is so close to home and then when I do I fill it right up lasts me a while unless I go somewhere at the weekend obviously. No one seems to have mentioned the extra weight of the full tank either if we are going to be pedantic!