Mikuni PHH Performance Carburetor Service Manual - Copy. This Mikuni PHH Performance Carburetor service manual covers: Purpose of a Carburetor, Features of PHH Type Carburetors, Selection of Carburetor Model, Construction and Function, Mounting on the Engine and Carburetor Adjustment, Overhaul and Maintenance, Inspection and Adjustment of Fuel Level, Setting and Tune-Up of Carburetor, Troubleshooting, Exploded View, Parts List, Jetting Table, Gasket Kit and Jetting Parts List. Includes very detailed diagrams and instructions. This is a Must Have for Mikuni PHH Performance Carburetor Maintenance and Tuning! This is a copy of the original Mikuni PHH Performance Carburetor Service Manual, with permission from Mikuni American Corporation.