Draining fuel from tank on K100

[pinhead]

Any quick and dirty ways to drain tank on 1985 K100RT without removing tank?  thanks

[Laitch]

Use a good quality bulb siphon and hose to transfer it into a container on the floor when the Brick is on its side stand. If that's not dirty enough for you, don't use the bulb siphon; instead, start the siphon effect using your mouth to suck on the discharge end of the hose.

[Chaos]

use a siphon to get out most of it then use a tube on a turkey baster to suck it out of the corners.

[John Lang]

I copied this from somewhere on this site a few years ago:

If you can get a plastic gallon jug to use as a catch can, then you can put a jumper between the right side of fuse 4 and the left side of fuse 6 to make the fuel pump run.  Disconnect the fuel rail hose at the forward end and hold it into the jug, then run the pump with the jumper to empty the tank and catch what comes out.  Then inspect for black rubber debris and water, etc.

Pour the good gas into a bigger gas can and repeat until the tank is empty.  i had about 2 qts of water in a tank before when the previous dude put the gas cap on backwards.  That will troubleshoot the tank for water.

[pinhead]

I copied this from somewhere on this site a few years ago:

If you can get a plastic gallon jug to use as a catch can, then you can put a jumper between the right side of fuse 4 and the left side of fuse 6 to make the fuel pump run.  Disconnect the fuel rail hose at the forward end and hold it into the jug, then run the pump with the jumper to empty the tank and catch what comes out.  Then inspect for black rubber debris and water, etc.

yes that is what I was thinking of doing.  It would give me a visual of fuel pump out put (having trouble starting bike and suspect fuel system)

[The Mighty Gryphon]

If you can get a plastic gallon jug to use as a catch can, then you can put a jumper between the right side of fuse 4 and the left side of fuse 6 to make the fuel pump run.  Disconnect the fuel rail hose at the forward end and hold it into the jug, then run the pump with the jumper to empty the tank and catch what comes out.  Then inspect for black rubber debris and water, etc.

The fuel pump thing is what I would do followed by sucking out the last little bit with a 50ml syringe and a chunk of tubing.  Whatever is left can be mopped up with a couple paper towels.

[Martin]

Easy method if you have access to a compressor. Stick a piece of hose through the filler hole into the lowest part of your tank stick the other end into a suitable container. Wrap a rag around your air gun and stick it into your filler hole it doesn't have to be totally air tight. Give the tank a short small blast of air and this will start the syphon process. Don't get over enthusiastic with the air gun otherwise you'll get fuel everywhere.
Regards Martin.

[The Mighty Gryphon]

Don't get over enthusiastic with the air gun otherwise you'll get fuel everywhere.

...or blow out the sides and bottom of the tank.

[Ingo]

 If done carefully you can increase the tank capacity that way   

[daveson]

I've done it the way John has suggested, I only ran the pump for a few seconds, then removed the jumper wire, from then on it syphons out. Another mouth free way if it's near full, put your thumb over a hose before pushing it to the bottom of the tank, then remove your thumb from the hose, below the tank level of course, into a container on the ground.