Join Date: Oct 2013
Location: Chilliwack, BC, Canada
Some other suggestions and a question:
Did you have the bike running nicely before you loaded and hauled it home? If not, I'd drain the gasoline and (this time only) dump some new, direct from the pump, premium gas with some Seafoam into the tank. Don't go heavy on the Seafoam as it has been reported to foul the spark plug if done to great excess. The reason I suggest premium, despite that the engine doesn't need the octane rating, is to do away with the alcohol while sorting the carb.
Likely most of us are thinking that the shaking around on the drive flooded the intake with fuel. It may be that the vacuum petcock isn't shutting off.
Before pulling the carb apart, have a look at the petcock (fuel valve on the bottom of the tank) it has two hoses leading off. The one closest to the right side of the bike has the hose which leads toward the rear of the carburetor while the one closer to the left side of the bike leads to a nipple on the front of the carb, close to the cylinder head.
Pull the two hoses and notice whether fuel leaks out of either one. There should be no fuel at all in the hose on the right nipple. If so the petcock is leaking fuel through the diaphragms which will run fuel directly into the intake and cause the symptoms you describe.
If fuel continues to run from the left hose, the petcock isn't shutting off completely. This usually won't be a problem but combining a leaky petcock with a trailer or truck ride home can shake the carb around enough to cause it to leak fuel intermittently. Again, usually not a big deal but enough times and for long enough and you will have a flooded intake. Check the oil level and see if it's over the top of the sight glass. If so the crankcase is full of gas and you need to change the oil and filter.
If that's the case, an oil change and a short ride may sort it out. If that doesn't do the trick, check the petcock again for fuel continuing to run and if so, you may wish to plug the petcock until you can have a kit installed.
I'd look at the other solutions after these.
If it's Paul's suggestion (PD Westman), don't admit that and claim it wasn't the choke and simply sorted itself out. ;-) Don't feel bad as we all do that. It keeps him on his toes if he thinks he misses the mark once in a while. :-)