Here is an idwea that I use and works great for me.
I put a plastic pail under the drain for the air conditioner for the house, now this water will have next to no dissolved minerals in it (real soft). I then went and bought a weed sprayer and put the air conditioner water in it. After I wash some of the bike I rince it with tap water and then rinse the parts i just washed with the AC water. This works great but make sure you pre rinse with the tap water first cuz that will rince all the soap off. If you don't pre rinse you will need alot more AC water to rinse all the soap. Then blow dry and Fluff....lol
Try it, it works GREAT.
Oh ya I also got a 5 gal jug and store it up. Don't store it to long cuz you will get a bacteria slime growth in it if you store it to long.
cheers and have fun