[Yooperforeman]

My 500 is all stock.I thought it was too lean from the factory,when cold starting it needs the choke on for a long time.I rotated the carb. upside down and removed the mixture screw with needle nose pliers,then cut a slot in it and now I can use a screwdriver to adjust it.It's at 3 and 1/2 turns out now.

 

[Yooperforeman]

I think it helped.Lately I've been able to start it without the choke.We'll see when it gets cold.