I pretty certain applying some RTV around the wiring grommets and the case seam will seal this unit very well. Plus, I think the unit will be very well protected, even while washing the motorcycle, if it is located under the dashboard, behind the windshield. Of course, mounting the unit under the pillion saddle will provide even more protection from moisture.
__________________
Spud
"Never argue with an idiot. He will drag you down to his level, and beat you with experience."
Mark Twain
2015 Zongshen ZS250GY-3 (RX3)
2006 Zongshen ZS200GY-2 (Sierra 200)
2005 Honda XR650L
2004 Honda CRF250X
1998 Kawasaki KDX220
Mods made to my Zongshen ZS200GY-2:
http://www.chinariders.net/showthread.php?t=6894