Originally Posted by george_n_texas
What's a tickler button?
The little spring loaded button, left side of carburetor, next to the idle speed screw. It pushes down on the float inside the carburetor and gives the engine a little extra fuel for starting. Usually it only takes a couple of seconds. Depress it, hold it down for 2 or 3 seconds then start your bike.
I've just been informed by Fairracing that some of the newer Grubee carbs came without the tickler (primer). If you have this engine you might not have that feature.