I have just picked up a 83 Aspie GL1100. I knew it had a few problems when I bought it and factored that into the price, like the starter clutch it needs. I thought I could loosen it up with the Seafoam treatment but I haven't been successful, so I guess I'll pull the motor this weekend. One issue I have had is that while allowing the Seafoam to work out on the highway, after about 30 miles or so the engine started sputtering and backfiring and then cleared up after about five minutes. It's done that twice. I thought it might be bad gas (in the bike) but it just seems strange that it would do it so intermittently. I know the carbs were cleaned just before the starter clutch went, but the bike has been sitting for about a year. Anyone else had this experience?