94 VFR 750 won't idle when tilted

Hello all,

So i committed the cardinal sin and let me bike sit for 5 months. When i tried to start it, it wouldn't run very well. I cleared all the old gas out, changed the fuel filter, and ran Sea Foam through it to clean it out. Now it runs good (when warmed up) and idles fine when upright. As soon as i put the kickstand down and lean the bike onto it, it starts to stumble, misfire and backfire through the intake. Does anybody have any ideas of what it might be? Thanks for your time.

 

Does it run up to at least 60 mph on the road??

Is the fuel pump clicking continuously???

low fuel level in tank or clogged fuel filter??

sticky float in carb causing flooding in 1 or more cylinders?

 

That bike doesn't have a kickstand cut off switch does it?