Revivng slumbering motorcycle

Jos51700,THANK-YOU for the detailed list. didn't think about the possibility of tank leaking right over a hot engine.Kinda like squirting lighter fluid on hot charcoals!

Actually you can spill gasoline all over a hot engine, headers, etc. and flare-ups are rare. The issue is that you can have sparks where you can't see them. Points, spark plug wires and caps (which are removable on most motorcycles), etc can spark internally and you never know it. The plug caps can come loose from the wire but be held on by the rubber boot and spark's gonna spark. You can unscrew the cap from the wire to see how it works. Cars rarely have this handy, um, 'feature'.

And the other issue with bikes is the gravity-feed system. That leak ain't going to stop unless you kick the bike on it's side, at which point it will...leak from somewhere else, and probably multiple somewhere else's. With a car, you can kill the fuel pump and at least limit the fuel supply for a while, whilst you run around in a panic looking for some smallpox-riddled Indian blanket or something to throw on the fire.

I burned a friend's GT380 to the ground twenty years ago while 'doing a favor' cleaning his carbs. I can still remember seeing that fire start under the points cover and climb up the dripping fuel to the carbs, and that was a slow leak.

We can supply more specific info to the model you have, once you give up the David Crapperfield routine and tell us what it is, and invite us over for beer.