Not sure this will help as I've only seen this happen on cages but, in some cases the oil gets pumped to the top of the engine and can't get back down to the crank case fast enough wich causes the light to come on. This usually means that there is some kind of a restriction in the top end of the engine ie chunk of gasket,oil slag build up,or too small return holes. Thats the only thing I can think of at this moment. Hope this helps ya some. Remember I am not a bike mechanic nor do I play one on TV.
