Hoping someone can shed some light on coil resistance values. The bike is a 2004 1150GS ( dual spark ) and the coils on the primary plugs were replaced a few years ago ( bike has just over 100,000 miles on it now ) I was doing some winter service and noticed it would not run on the secondary plugs alone, when the primary coils were replaced it would not run on just the primary plugs but ran OK on just the secondary ones. This leads me to believe that the main coil might be suspect. Checking the main coil primary resistance I get .4 ohms ( spec. is .5 ), secondary resistance I get 7220 ohms ( spec. is 7500 ) both reading a little low. I checked the primary plug coils and get .9 ohms ( spec. is .87 ) reading a little high. The bike was running well but the gas mileage dropped off a little, I'm wondering if the low readings warrant replacing the main coil?