This might be a new one for a seized motor.

[lilwoody]

Got on the bike at 2300 on Thursday after a 16 hour shift and the starter wouldn't turn the motor. I jumped it with one of the trucks, still no turny. One of my coworkers helped me push the bugger, back tire just slid, tried 3 through 6 gear. Put it on the center stand and try turning the tire in 6 gear, motor still won't budge. I didn't have time to mess with it then, my son brought my grand daughters down that night. So I put the it in a out of the way spot and came in today to check things out.
I figured I had one of the 2 maladies that seen to effect these bikes, Goats or Stalworths. Instead of tearing right into the cases I pulled the tank and popped the plugs out just to see what would happen. Put the lil bugger in 6 gear and gave the back tire a pull, then low and behold gas came out the left plug hole like a fountain. The right cylinder wasn't as bad but a good amount came out that one too. Only thing I can guess that caused it was I got the fuel hoses crossed when I checked the valves a few days prior. I drained the carbs and rolled it over for quite some time. I have it airing out with the plugs out now but it rolls over like it always did, with the plugs in or out. I'll do a oil change before I light it up because it couldn't have got that full of fuel and not had some weep by the rings into the crank case. The oil looks good but I'm not going to chance it.
I guess being kind to small children and small domestic animal's may be helping my karma. I thought for sure I'd be into a days long project. I'm sure glad it was something this simple but I've never had a motor lock up on fuel before. Seems kind of odd.

[joshr08]

liquid will not compress.  im guessing your float height is way to high and or petcock is flowing gas even when not running the bike and it just happened that your intake valves were open to let all that fuel flow into the cylider. 

[jeremy_nash]

sounds like you got very lucky there,  throw some of that luck my way, as I'm doing a compression check on my pleasure boat tomorrow 

[tt_four]

Not sure how much you know about your motor, but a little bit easier than trying to get the GS into 6th and spinning the back wheel is just pulling off the right side cover and spinning that large bolt on the right side with a big wrench. It's much easier than trying to fight your way through the gear ratios in the transmission.

Glad it didn't turn out to be anything bad!

[bombjack]

I'm not sure about this, but I have heard that gasoline can get forced into the engine when you tried to push start it, and the cylinders are filled with gas. This would degrade the oil.
I would check the oil just to be sure.

[sledge]

Agreed, change the oil and filter immediately.

[BaltimoreGS]

The technical term for this condition is hydrolock, it can do a lot of damage if you force the engine to spin.

-Jessie

[JAY W]

Seen this happen before on a bandit 400 because fuel tap was left on prime,the o`rings that fit on the inside of the brass buckets that the float valves fit into was worn,you need to pull the buckets out to fit the o`ring.also reset float height.
                  Combo Jay.