[gsharapa]

Couple things you might want to consider; Put a return line back to the tank off the regulator as it will keep the cooler fuel coming up vs just letting the fuel dead head and heat up. The other is what kind of fuel are you using ie; in the U.S. there are a lot of stations that have methanol blend and methanol blend fuels boil at a much lower rate. I had the problem at a Cobra meet in Austin, Texas (late March) as it was lower 90s and the fuel was boiling in my carb. I ended up putting 5 gallons of 107 in it and that fixed it but clearly staying away from methanol.....