I have an 85 Westy GL that runs like a champ around town.  But when I
run it for 45 min at highway speed it starts to miss suddenly.  Then it
only fires on 3, sometime 2 cylinders and it'll kind of choke and cough
and only rev to 2000 RPM and then stall.  If I try to restart
immediately it'll cough and hit on 2 or 3 and die again.  If I wait 30
seconds it'll start right up and drive like nothing happened.  Sometimes
then it'll go for another 45 min, sometime 5min.  I think the obvious
suspect is the fuel injection system.  Where would you start?

 

This is a topic that I see has been discussed in the archives so please
forgive my ignorance.  I can't figure out what course of action to
implement first from the many suggestions in the archive.

 

Humble Newby- j