I park my bike outside, and its always covered and locked up. When ever it rains though, water always pools up on top of the tank. it fills up then drains down the damn air vent on top!

So, I have found a simple solution! simply put a decent size, cheap as hell, beach ball on your tank or seat to push the top up (like a tent) so the cover no longer collects water!

viola!

 

great idea, i usually always picked up a stick off the ground or just broke on off a nearby tree to prop it up. oopps i hope i didnt **** someone off with that last comment.....

 

mine pools but doesn't go down the vent. my wifes bike has a different brand, and the wind has torn it to shreds. kinda pointless looking now, but those covers ain't cheap.

 

http://www.cycleshelter.com/

Not cheap, but worked awesome for me before I had a garage. Wind, rain, thunder storms. It took it all.