I think you will find that the nuts (welded to plate) it bolts onto are raised on the side where the recfifier is bolted on, therefore the rectifier sits flat againts the nuts but there is a gap between the back surface of the rectifier and the plate that it appears to be bolted up to. It really needs a flush fit againt the plate rather than the nuts.

Hope that makes sense and maybe worth everyone with a tyga tail to check how theres is mounted. This may be enough if it has hard contact to the nuts but I moved mine so it was flush against the plate after a rectifier failed on my road bike. Personally I just drilled two more holes in the plate and moved it along so it was no longer using the welded on nuts and the back was flush against the plate..