Oil gauges on Nortons are like tits on a wild bor, just sometime else to protect in a fight but not very functional. Point being the gauge is for show and if was showing ok in daylight it'll still show ok in the dark and les glare from road vision. Still lighted electric wired sendor w/o oil tube feed would be pretty cool dimly lit to entertain day and night. Best wishes finding a 1.5" version of this and ping back when ya do.