Do any of you guys' gs' live outside? Unfortunately mine does so I bought an Oxford rainex medium cover though seems a little flappy. Should I go smaller? Any advice?

It should fit snug,no flappy wappies. 

I'll take it back I think then!

No location info in your profile, but if you can order from louis.de (english version is just one click in the upper right corner once you open the site), their medium cover is so snug on my GS500F, anything smaller would not fit. Not too expensive, been using it for 2 years now when I park outside. Bike's bone dry under it even after the heaviest rains we get.

need to check in daylight, as woke up this morning and cover was still on bike, though was def flappy a bit!