Join Date: Feb 2008
Location: Renfrew, Ontario, Canada
The gl1000 has main jets that are held in the carb body by O rings and pressure from the float chamber cover. They are not threaded into the carbs as in most motorcycles. If those O rings have deteriorated, as they did on my previous bike, the gas gets sucked around the main jet as well as thru it, and your mileage pretty well hits the gutter. If this is the case, just replace the O rings, 1 per jet. You may have to shop around to find the right size rings, cause I don't think Honda stocks them anymore.
Previous bikes: Honda 150 Dream, Royal Enfield Bullet,Norton Atlas,Suzuki 750 Waterbuffalo, 79 gl1000,07 gl1800