Stumped mech idiots need some suggestions
My friend's VN750 is having a problem we can't seem to correct. I am looking for suggestions.
The bike starts and runs great, but every now and then it will just sputter and die, pretty much like it is running out of gas. Normally, after a few minutes (2 to 10 min usually) it will start right back up and run fine until the next sputter. Sometimes it is later the same day, but it has also gone a few hundred miles in between, so it is very sporadic. At first it seemed like it might be a temperature issue, doing this before it was fully warmed up, but that isn't true. It happened yesterday after 20 minutes of stop and go traffic.
It is a 95, coastered, marbled, de-goated. 3 weeks ago the carbs were removed and cleaned, and he runs Seafoam through regularly. He has a good sealed battery. The coils, plug wires and plugs were just replaced. The old plugs were all looking good. We checked the fuel lines and vaccuum hose. The gas cap vent is clear.
What's next to check? Could something this infrequent be electrical?
"Shutting up rarely leads to anything bad"
VROC # 28175
-2004 Vulcan 1500 Classic 22000 miles
-1995 VN750 (Back home again!) 25000 miles
-1995 Suzuki DR350 Dualsport 1720 miles