Here is my situation:
I have the Raptor petcock installed. As a habit when I park the bike, I turn the petcock to OFF position. When I come back to the bike, whether it is a few hours later or a few days later, it takes a couple of good cranking sessions to start up. Not a huge deal, but it gives me a scare.
There have been a few times where I park the bike and have left the petcock in the ON position. When I do that, the bike usually sits for a short period of time, (less than 1 hour). Under these conditions the bike will start right up with no effort. It is unclear if the ease of starting is due to the engine being warm or fuel being readily available.
My question is, could this be due to a vacuum leak somewhere? (My guess would be carburetor) Don't know if this is how it works, but maybe the leftover gasoline in the carb. bowl evaporates, and the system takes a bit of cranking in order to prime itself, thus giving me a longer starting process.
Should I always just leave my petcock in the ON position even if it sits for a 4-5 days between rides?
I am trying to get a better understanding of the whole carburetor/fuel delivery system.
Thanks.