Does anyone know the weight difference between the Domiracer and Dominator? The Domiracer has a single gauge (tach), no turn signals, no brake light, lightened top and lower yolks. Are the engine specs the same? (Cam, compression, valves, etc) Same gearing? I prefer the look of the single gauge. Does the Domiracer tach provide any additional info? Such as high beam indicator, oil warning light etc? When did Norton go to 10,000 rpm tachs?