Re: Yet another mixture thread, or...? (Starting problems)
Teratoma.. sorry, didn't intend to "bash" your mentor. However in my opinion the advice you have received so far is not the best.
As for shutting off the fuel.. As xseler said, if the float valve in the carb works right it shouldn't matter.. I've forgotten to turn the fuel off on a bike more often than a I care to admit to myself, and to date have only had a problem once. If the float valve lets anything through you have the potential for fuel to drip from the carb, or to flood the motor. Either way you have excess fuel vapour which is not good in a contained space. If the engine floods (as happened to me), you have to pull the plug and turn the motor over to clear it, which can be a messy process.
Any day that starts with a good ride is already a better day, and a bad day riding still beats a good day working.
My Builds: My Beast
, Harley59's bike
, my Cruiser