| pos. | decription | spare part number | |
| 1 | Assembly-Cylinder | 396269 |
| 2 | Bearing-Cylinder Note: Requires special tools for installation. | 399267 |
| 3 | Seal, Oil | 294606 |
| 5 | Head-Cylinder | 212286 |
| 7 | Gasket-Head, Cylinder | 272163 |
| 8 | Breather Assembly | 391406 |
| 9 | Gasket-Valve Cover | 27803 |
| 10 | Screw | 94621 |
| 11 | Tube-Breather | 280005 |
| 12 | Gasket-Cover, Crankcase 1/64 Thick * Included in Gasket Set-Part No. 299577. | 271701 |
| 13 | Screw-Head, Cylinder | 94565 |
| 15 | Plug-Oil Drain | 94239 |
| 16 | Crankshaft Note: Order Part 94388 for timing gear pin replacement. | 396876 |
| 18 | Base-Engine | 392548 |
| 19 | Bushing-Base, Engine Note: Requires special tool for installation. | 295963 |
| 20 | Seal-Oil | 391086 |
| 22 | Screw-Crankcase Cover Mtg. Sem | 93585 |
| 24 | Key-Flywheel | 222698 |
| 25 | Piston Assembly-Standard | 391673 |
| 26 | Ring Set-Piston-Standard | 391669 |
| 27 | Lock-Piston Pin | 68546 |
| 28 | Pin Assembly-Piston-Standard | 295840 |
| 29 | Assy.-Rod, Connecting Note: For Connecting Rod with .020 Undersize Crankpin Bore-Order No. 390773. | 390402 |
| 31 | Lock-Connecting Rod Screw | 222114 |
| 32 | Screw-Connecting Rod | 92659 |
| 33 | Valve-Exhaust | 390419 |
| 34 | Valve-Intake | 261055 |
| 35 | Spring-Intake Valve | 65906 |
| 36 | Spring-Exhaust Valve | 26828 |
| 40 | Retainer-Intake Valve | 221596 |
| 41 | Rotocoil-Exhaust Valve | 292260 |
| 42 | Retainer-Exhaust Valve Rotocoil | 93630 |
| 45 | Tappet-Valve | 260933 |
| 46 | Gear-Cam | 211689 |
| 284 | Screw-Clamp Mtg. | 94419 |
| 300 | Muffler-Exhaust | 398507 |
| 304 | Housing-Blower | 494084 |
| 305 | Screw-Blower Housing Mtg | 94608 |
| 306 | Shield-Cylinder | 224543 |
| 307 | Screw-Cylinder Shield Mtg. | 93949 |
| 308 | Cover-Head, Cylinder | 222636 |
| 337 | Plug-Spark (Resistor Type-1-7/8 high, 47 M.M.)(Model No. 38566 only) | 802592 |
| 346 | Screw-Sem | 93705 |
| 358 | Gasket Set | 299577 |
| 383 | Wrench-Spark Plug | 89838 |
| 422 | Clamp-Oil Filler Tube | 223394 |
| 523 | Cap & Dipstick-Oil Filler | 391840 |
| 524 | Seal-Filler Tube | 68838 |
| 525 | Tube-Filler, Oil | 280133 |
| 527 | Clamp | 221428 |
| 552 | Bushing-Crank, Gov. | 491986 |
| 562 | Bolt, Governor Lever | 92613 |
| 592 | Nut-Hex.-10-24 | 231082 |
| 613 | Screw-Muffler | 94042 |
| 614 | Cotter, Hair Pin | 93306 |
| 615 | Retainer, E-Ring | 93307 |
| 635 | Elbow-Spark Plug | 66538 |
| 676 | Deflector-Exhaust (Direct Outlet) | 395700 |
| 683 | Screw-Hex | 93572 |
| 725 | Shield-Muffler | 223540 |
| 741 | Gear-Timing | 262479 |
| 757 | Link-Counterweight | 212359 |
| 758 | Assy.-Counterweight | 390172 |
| 759 | Pin Assy., Piston, Std. | 298909 |
| 761 | Screw-Counterweight | 93874 |
| 836 | Screw | 93559 |
| 842 | Seal-Oil Filler Cap | 270920 |
| 847 | Filler Group-Oil | 392066 |
| 869 | Insert-Intake Valve Seat (Standard) | 211661 |
| 870 | Insert-Intake Valve Seat (Standard) | 211661 |
| 871 | Guide-Exhaust or Intake Valve | 231218 |
| 883 | Gasket-Pipe, Exhaust | 272309 |
| 1020 | Eccentric | 261190 |
| 1021 | Pin-Eccentric | 94160 |
