| Name | Brand | Type |
|---|---|---|
| AA - AIR CLEANER GROUP | STH | assembly |
| AB - ALTERNATOR GROUP | STH | assembly |
| AC - BLOWER HOUSING GROUP | STH | assembly |
| AD - CARBURETOR GROUP | STH | assembly |
| AE - CONTROLS GROUP | STH | assembly |
| AF - CRANKCASE COVER/SUMP GROUP | STH | assembly |
| AG - CRANKSHAFT GROUP | STH | assembly |
| AH - CYLINDER GROUP | STH | assembly |
| AI - CYLINDER HEAD GROUP | STH | assembly |
| AJ - FLYWHEEL, IGNITION, AND STARTER GROUP | STH | assembly |