Hi 34nineteen,
No the fuel never boils, I have the heat under control 87 degrees max, I have to use the spare fan in traffic to maintain that but otherwise the bike runs at around 76/80 on motorway/A road runs.
Fuel vent works as it should.
I'm in the process of measuring how much get's vented, I made the little catch can yesterday & working out the best place to fit it today so will know an average in the next week or so.
I tried vacuum venting like Cooter suggested but found fuel in the air box bottom so there's too much to vent successfully that way, although this will help at a later date.
Thanks for your reply, any input helps.