I always fill my bike with it in the upright position and top it off to the bottom of the filler neck and never had a problem as you have described. As someone else has mentioned the fuel cap should allow the tank to vent so you may want to have that checked. If you live in Pa. a Inspection Station has the equipment to check your cap. One other thing you may want to have checked is the "lean angle safety switch". Most large cycles, to include the 109, have a device that actually detects the angle of your machine. It is safety feature which is part of the fuel delivery systen and cuts power to the electric fuel pump should your bike be laid over. Your dealer should have a test procedure to check the switch.GTBozak said:Thanks for the tip Bob.
I didn't do the idle thing yet because I wanted to eliminate other possibilities. When you mentioned gas, I recently started filling up at a sunoco, just because they were selling 94 at the same price as the 92 across the street, but maybeÂ that sunoco fuel has me all fouled up, maybe their gas was watery.
The bike sure is acting weird. Today I was pulling a uturn with extreme lean angle because I was trying to beat a line of slow traffic, and the bike cut off mid turn. It touched onto the peg , maybe even the turn signal before I could get enough grip on the upside bar to yank it back up. Only 27 miles into a new tank of gas.
On another theory, will overfilling the tank create too much vacuum as the fuel is spent causing the cutoffs? I've been filling the tank while sitting on the bike lately and it looks like more gas gets in there that way, but maybe that's not good. I hope it's that or the gas cap thing posted by Joshua109. I think they might be similar issues.