My MC28 with a Tyga tail had the rectifier hanging off the sub-frame with a zip-tie when I first got it. I have since welded up a set of brackets to hold it between the rails of the sub-frame. The rectifier runs very warm, I have been told due to the HRC harness I have. I stacked a computer CPU heat sink and electric fan on top to aid in the cooling. Seems to work fine. My bum stays nice and warm too! Heat reflective tape in the underside of the tail helped being the temp down a bit.
_________________
Andre E. Benguerel
1996 Honda NSR250R
Daijiro Kato/Fortuna Replica #74

2000 Honda RS250R (NX5)
2008 Honda RS250R (NXA)
AFM Expert #430