I just picked up my first K100. It is a running project bike that I'm making into a cafe racer. It ran fantastic when I picked it up, then halfway through the 10hr drive home a strap broke and it dumped on my trailer (the bike is cosmetically ok thank god) I smelled some gas, but it was 2am so I just strapped it down and kept driving. This morning I unloaded it and tried to start it and it was POURING gas out the exhaust and wouldn't start(it has open headers until I finish welding the new pipe). I pushed it into the garage and pulled the plugs to let it dry out. A few hours later I tried again and it did the same thing. Finally when the tank was almost empty it started, but was clearly sputtering, filled the tank up and back to pouring gas. So what I have gathered so far since it did start is that its getting spark, has compression still, and is obviously getting way too much fuel. The oil level is good in the sight glass, so the gas isn't getting past the rings yet. All the wire connections look good, and there is no visible damage. 
Where do I go from here? Is this from it dumping on the trailer or did something maybe just rattle loose?

After tinkering with it more today, I've found that if I unplug the fuel pump the bike will start and run fine on what is in the fuel rail. As soon as I plug the fuel pump back in, it instantly dies. Would my next logical step be to check the FPR?

After spending most of the day going through the bike using the troubleshooting EFI guide, here is what I have found:
The temp sensor, airflow meter, and FPR are all good. The fuel pressure measured at about 32psi. When I pull the injectors and crank the bike, they only fire after the starter button is released, and they seem to be spraying a very excessive amount of fuel. When I disconnected the EFI computer, I dumped a substantial amount of water from it, likely from it being on the trailer in the rain. 
Based of what I have found, it seems like the wrong signal is being sent to the injectors. Is it likely that the computer is the cause of my problem? Is there anything else I can check?

I would wait for it to dry or help it dry out,  then use electrical cleaner on connections.

Unplug earth from the coils before checking fuel spray, some people end up with a fire after doing that, in case you didn't already.

Was the fuel spray constant or pulsing?

Do you mean it sprays when the start button is released and doesn't stop until the key is turned off?

daveyson wrote:Was the fuel spray constant or pulsing?

Do you mean it sprays when the start button is released and doesn't stop until the key is turned off?

The spray was constant. It sprays when the start button is released and stops several seconds later.

Get some isopropyl rubbing alcohol 90% from the drugstore and flush the ECU and it's connector with it to remove the water.   Dry it gently with a hair dryer.

With any luck it hasn't been wet long enough to cause any serious corrosion.  Clean the connectors with deoxit.  That should get things back to whatever condition preceded the soaking.

The FICU is a most likely cause of your troubles. Good thing is they are quite robust. As said get it dried out using patience too. Then make sure to clean the pins before plugging it all back together.

Point-Seven-five wrote:Get some isopropyl rubbing alcohol 90% from the drugstore and flush the ECU and it's connector with it to remove the water.   Dry it gently with a hair dryer.

With any luck it hasn't been wet long enough to cause any serious corrosion.  Clean the connectors with deoxit.  That should get things back to whatever condition preceded the soaking.

Good luck getting Alcohol these days !

SOLVED!
As suggested, the FICU was corroded from the water, a little more than could be solved by sloshing with alcohol. 
Last night I opened up the FICU and used alcohol on Q-tips to clean up a section of particularly bad oxidation. There is a foam strip meant to protect the circuit board that had trapped a layer of water against it and caused some nasty build up. After a thorough cleaning (and replacing an injector o-ring I tore because I didn't lube it enough   ) the bike fires up and runs great. Next job is coming up with a better location for the FICU to keep it dry in the future.

wkordo wrote:. . . then halfway through the 10hr drive home a strap broke and it dumped on my trailer (the bike is cosmetically ok thank god) I smelled some gas, but it was 2am so I just strapped it down and kept driving.

Did it drop onto its right side and that's how it was strapped for the remainder of the journey?

Laitch wrote:Did it drop onto its right side and that's how it was strapped for the remainder of the journey?

It dropped onto its right side and I picked it back up and strapped it upright again.