I nearly always buy my fuel on the morning of the event or the day before, so the fuel is relatively fresh and always from the local superstore site with a high turnover of fuel. Never really suspected the fuel as I always thought it was water based from streams etc getting through the airbox. I always clean the air filter before each event and clean the carb every two events usually. Air box and mudguard area is well sealed with silicone.

On a slightly different note, the thing I have never been happy about recently is that I always ran breather tubes from my carb overflows/vents up high under the tank out of harms way and the carbs remained clean. The last two bikes have not had these overflow tubes as manufacturers reckon water can get sucked up them, to be honest I'm sure this is the point where crap is getting in to my carb and am thinking of going back to fitting long breather tubes to these vents again.

Hi,

bike was running a bit off,so carb off[twice] -no joy- then read JOHN-Bs post about the 2 small drillings on the intake side of carb - blew through - re-fitted - PERFECTION -The advice on this site is second to none -Many Thanks