People park their motorcycles outside, especially in the winter, with untreated bare metal interior, part-empty fuel tank causing the inside surface of the tank to rust. Tiny particles can get through the fuel filters above the petcock (which also needs to be cleaned) or other inline filters (replace).
The most common reason for this condition is rust in the gas tank. It only shows up on the highway because the increased fuel consumption at highway speeds outpaces the fuel flow slowly dripping into the float bowl(s) through dirty filters and empties the bowls before they can refill. If you can park the bike on the shoulder for 10 minutes after it dies (giving fuel time to refill float bowls) and then start up and run fine again (for awhile)… dimes to donuts, that’s your problem. Remove the needle/seat assembly and use a small screwdriver or pick to remove the tiny little filters and clean them. All things being equal and no other apparent or obvious issues/problems, the most common reason a motorcycle inexplicably “dies” on the highway (and nowhere else) is fuel starvation due to empty float bowls caused by clogged filter screens above float bowl needle/seat intake valve assemblies.
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