So I am a moron and wasnt paying attention to the fullest. When filling up, I accidentally put about 1 gallon of diesel in my tank, and filled the rest with gasoline. Its a 4 gallon tank. The bike is a YZF750. Being in the middle of nowhere, and the gas station not having a hose to drain my tank, I limped home (about 100km's). The bike ran fine at highway speeds, but idled poorly and smoked a bit when starting. Now I am faced with an even bigger problem. I drained the tank, drained the carbs and refilled with gas. And she wont start. So I pulled the carbs, cleaned them throughly, removed the starter jet, main jet, pilot jet, floats, sprayed contact cleaner through the jets and journals, put in new spark plugs and she still wont start! Does anyone have any idea what kind of damage I could have done? Right now I am thinking there may be valve damage (way out of spec) from the diesel needing higher compression to ignite. I didnt check the compression, and I didnt check for spark (assuming the diesel didnt affect the coils). I can get at plugs for cylinders 1 and 4 easy enough to check for spark, but it is a lot of work to get to the middle plugs (clinders #2 and 3). Would checking spark on just the 2 outside clinders be sufficient? (2 coils on the bike, one for clinders 1 and 2, the other coil for clinders 3 and 4. So I would essentially be testing each coil). The fuel pump is OK I think, I tried starting it, then loosened the carb drain bolts, and gas pours out, so there is gas in the bowls. I also lifted the tank with the fuel hose disconnected from the carbs, and hit the starter; A small, steady stream of fuel poured out. Should there be pressure in the fuel line? Maybe my fuel pump is clogged up, but again, there is gas in the float bowls, I just dont know if they are full. The bike will turn over but just wont start, like there is no spark. But I dont see how it can run fine, then after sitting for an hour, wont start back up. Anyone with any help would be great! thanks.