Are you ready to work on your carb for the first time? Maybe you have already damaged those damned JIS (Japanese Industry Standard) screws? Before you think of opening your carb, pick up this carb screw replacement set and save yourself the headache of waiting for a set when you strip yours. We've all done it.
 
Since most of us don't own a proper JIS screwdriver, those screws are set tight from the factory. So we end up stripping the heads of the stock BST40 bowl and cap screws. This makes for painful carb maintenance work, clean, tune or jet kit install.
 
Once you've got those Allen (hex socket head) screws in place, it's a breeze to tune your carb. You can use an Allen wrench to remove the bowl with the carb only slightly rotated as you try to find the best jetting for your bushpig.