Oil pressure switch

[His Dudeness]

It might not be buggered it might just need to be cleaned. The float could be sticking or the wire going to the switch or a pin in a connector could be grounding.

On a side note there's some nice pictures of a R6 oil level gauge. The ring terminal is bolted to the engine so that is permanent ground. The float moves up and down on a shaft, when the float gets low enough it connects the ring terminal and the wire so the wire is grounded and your light comes on




There's the fazer one