pilot screw tool www.motorcycleproject.com
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Right angle pilot screw tool
This is an unbelievably exquisitely-made tool. Three different spiral gear heads screw onto the end. One is a mini chuck that holds any one of the several optional bits. The head in the center of the picture accepts standard 1/4" hex bits. The third head is the short plain blade screwdriver. This is a great price when you consider that the other tools are just a curved cable type that offers very poor feel. Gear drive is effortless, and very easy with which to gauge your adjustment.

All carburetors having their idle mixture screws either upside-down or tucked into tight, difficult-to-access places. Also works well for V4 throttle sync screws, which are on the bottoms of those carbs, and for carbs whose sync screws are on top, underneath the fuel tank. Limited supply.