Bike was sitting Now won't start

[alantf]

Originally Posted by Water Warrior

I think JohnC is thinking a leaky vacuum line will suck air into the engine and therefore lean out the fuel mixture. I'm sure he will clarify that for us.

I hope he does clarify what he thinks. All a leaky vacuum pipe will do is to stop it sucking a vacuum, which means that the petcock valve won't open, so fuel won't flow to the carb.