Re: carburetor is leaking from primer screw
If the carb float leaks enough and you park the bike for overnight and forget to turn off the gas. It can overfill and leak into the intake. Draining into the engine till it fills the lower case. I'm just saying that it isn't very hard to make it right. I use high octane fuel and I think it makes a difference too. Just seems like it runs smoother.
Put something FUN between your legs..