Join Date: Aug 2011
Year/Make/Model: 2014 Kawasaki Vulcan Vaquero ABS SE
Color: Orange SE
The risk of leaving the petcock on is a potential hydrolock. If all the conditions are right, a carb could leak, filling a cylinder full of fuel. Fuel doesn't compress like air does, so when the cylinder comes up, if it happens to be on the compression stroke, it could slam up against a wall of fuel and bend a rod, damage the starter, do any number of damages. It could also gum up if left on for long periods.
That situation isn't likely, but it is possible!
"8 But God demonstrates his own love for us in this: While we were still sinners, Christ died for us."
Romans 5:8 (NIV)
2014 Kawasaki Vulcan 1700 Vaquero ABS SE
iPod Connector Kit, Kuryakyn Highway Pegs, Mustang Touring Seat, Marvella's Hitch, Kuryakyn Trailer Wiring Kit, Haul-Master Tag-a-Long Cargo Trailer
2011 Honda Shadow Aero 750 (Wife's)
Memphis shades quick-release windshield, OEM Solo Seat, Mustang Fender Bib, Chrome Solo Luggage Rack
Past: 2006 Vulcan 900 Classic LT