Modern Buddy

Hey there! I posted this in the Roughhouse forum awhile back, but I figured that I'd get more responses here. I have a '13 roughhouse 50cc--should be the same engine as the Buddy, I think? Anyway, after it's been sitting around for 4 or 5 days, or if it's been rattling around on a trailer, I struggle to start it. It's like the fuel bowl empties and it takes TONS of kicking, cranking, or sometimes my only option is to squirt some fuel into the carb to make it go. Is this normal? Anything I can do to make it easier? Doesn't seem to be related to cold/humidity. I recently replaced the spark plug, fuel filter, and cleaned the carb.
THANKS!!!

Stephen

Have you checked the fuel valve?

^that plus check your vacuum lines and make sure theres no cracks

Since this is a hard starting issue check your spark
plug, make sure it's not fouled.

Thanks for the replies. Spark plug seems to be good. Vacuum lines are still pretty new and look good to me. Where is the fuel valve? What would I check for? I assume that most folks don't have this issue?
Thanks again! I LOVE MY SCOOTER--I'd just like to make it easier to start after sitting for a few days or after bouncing around on a trailer.
Stephen