Motor dies after highway run

[triangleforge]

Had an issue occur for the second time today with the 2001 M600, and in the same spot. After about 25 minutes on the highway at 70-80 mph (including about a mile and a half up a pretty good grade), I rolled to a red light intersection and the motor died just as I was rolling to a stop. It happened at the same intersection the last time I rode that route a little over a week ago -- but hasn't happened anywhere else. At this point its more of an annoyance/curiosity than a problem, but I was curious if there was anything worth trying to test.

Bike is a 2001 600cc Monster, carb'ed, stock airbox & pipes. We're at about 5,300 feet elevation here so the bike runs a tad rich as a general proposition, and has one step hotter plugs installed to cut down on fouling.

[greenmonster]

Possible fuel starvation.
Kinked tank hose or bad tank vent are two possibilities.

[Howie]

Check for kinked hoses and correct as needed.  Then go for a test ride.  After the bike stalls and  you have safely pulled to the side of the road, open the fuel cap.  If the bike stalls, you have a venting problem.  You might also want to pull a spark plug at this time.  If the plug is wet with gasoline then starvation is not your problem, jetting is.  If the bike only runs rich part throttle, drop the needles one notch a time.  Also inspect the needle jets.  If they are oval, replace them.  If the bike is rich wide open throttle, smaller main jets.

[Howley]

How cold was it? It could be carb icing.

[triangleforge]

Thanks for the ideas -- too warm for an iced carb (probably mid 80s) but a great thought.  I'll check for kinked hoses, since I had the tank off to do a valve check a couple of weekends ago. FWIW, the first time it stalled was when I was headed over to my friend Alan Sean's house to do the valves (Thanks Alan!!!), and the second time was on the way to drop off a thank you gift at his place. Still, might have been a kinked hose or a plugged fuel filter both before & after the tank was off the bike.