Pocket size slide calculator used to determine required jetting changes in carburetors due to changes in temperature and altitude. For single and multiple carburetion on two stroke and four stroke engines. Comes with a guide for determining rich or lean...

This FLAT SLIDE SMOOTHBORE design cuts down the turbulence in the bore-throat to increase air flow efficiency. Smoothbore design eliminates various orifices and obstacles in the carb throat which cuts down the turbulence to increase air flow efficiency