tuna boy
Well-known member
I have a 1980 1100 and have a problem that comes and goes. When I leave the house the bike coughs and misses under load that surfaces @ 3500 rpm. Once I get out on the hi way the bike kicks in and pulls real hard throughout the rpm range. Then I go through a small town with low speed and traffic lights. When I clear the town the same carb stumble is back. This pattern repeats as I ride, small town and stumble returns. During the entire time the bike idles nice. I have run some ATF and Seafoam in the bike with no results. The bike starts, idles and is well behaved except for the above and when the stumble is gone it pulls real hard. Any ideas or thoughts?