It's certainly been susceptible to blowing it out in the time I've had[QUOTE] the bike (it now has at least 100,000 miles on it) but I really need to do something about it. If I can't flat stick it for hours at a time it's not much use. [/QUOTE] Given your timetable before you set off you must have eaten in to your sleep time a bit by the time you got home even if you didn't look at investigating the problem.