| OEM | OEM | Description | Used on |
| 25279-36 | 585-36A | Breather screen separator | 36 to 57--OHV |
| 2528-33 | 37625-33 | Inner clutch disc complete | 1935 to 1940 |
| 25281-37 | 585-37 | Breather oil separator seal ring | 37 to 57--all W & G models, 37 to 48-74" & 80" sidevalves |
| 25285-37 | 585-37B | Seal ring retaining pin (2) | 37 to 57--all W & G models, 37 to 48-74" & 80" sidevalves |
| 25287-37 | 585-37A | Seal ring spring | 37 to 57--all W & G models, 37 to 48-74" & 80" sidevalves |
| 253-29A | 22251-29 | Piston with rings and pin - standard size | 1919 to 1950 |
| 253-29AS | | Piston with rings and pin .005" O.S. | |
| 253-29C | 22252-29 | Piston with rings and pin - .005" O.S. | 1919 to 1950 |
| 253-29D | 22253-29 | Piston with rings and pin - .010" O.S. | 1919 to 1950 |
| 253-29E | 22254-29 | Piston with rings and pin - .020" O.S. | 1919 to 1950 |
| 253-29F | | Piston with rings and pin - .030" O.S. | 1919 to 1950 |
| 253-29G | 22256-29 | Piston with rings and pin - .040" O.S. | 1919 to 1950 |
| 253-29H | 22257-29 | Piston with rings and pin - .050" O.S. | 1919 to 1950 |
| 253-29JA | 22258-29 | Piston with rings and pin - .060". O.S. | 1919 to 1950 |
| 253-29KA | 22259-29 | Piston with rings and pin - .070" O.S. | 1919 to 1950 |
| 2530-33 | 37645-33 | Inner disc lock washer | 1935 to 1940 |
| 25300-36 | 504-36 | Breather valve & gear | 36 to 57--OHV |
| 25302-37 | 689-37A | Breather valve and scavenger pump pinion gear | 1937 to 1948--74" & 80" Side valves |
| 25308-36 | 504-36A | Breather valve screen | 36 to 57--OHV |
| 2531-33 | 37647-33 | Inner drive disc lock nut | 1935 to 1940 |
| 25313-50 | 505-50 | Breather valve thrust washer--.115" | 50 to 57--OHV |
| 25313-73 | | Breather valve, with gear | 1941 to Early 1977--FL, FLH |
| 25314-50 | 505-50A | Breather valve thrust washer--.120" | 50 to 57--OHV |
| 25315-50 | 505-50B | Breather valve thrust washer--.125" | 50 to 57--OHV |
| 25316-52 | | Breather valve thrust washer | |
| 2533-26 | | Clutch sprocket drive disc, fibre | Late 1939 & 1940 |
| 2534-29 | | Outer clutch disc | DL, RL, WL, 1929-1940. |
| 2535-31 | 37865-31 | Steel friction disc (2) | 1932 to 1940 |
| 2535-39 | | Clutch plate spring | WL, WLA, Servi-car late 1939-1940. |
| 2535-40 | | Clutch plate spring (coiled type) | 1939 & 1940 |
| 25350-37 | 504-37 | Crankcase gear cover breather valve | 37 to 57--all W & G models, 37 to 48-74" & 80" sidevalves |
| 2536-33 | 37727-33 | Clutch sprocket bearing race | 1935 to 1940 |
| 2537-33 | | Inner drive disc ball bearing race | 1935 to 1940 |
| 2538-33 | 37730-33 | Inner drive disc ball bearing washer | 1935 to 1940 |
| 2539-33 | 37731-33 | Ball bearing spacer washer | 1935 to 1940 |
| 2540 | 05 | 4-36 N.S. x 14" Round head screw (brass) | |
| 2540-33 | 8852 | Inner drive disc clutch bearing ball (96) (5/32") | 1935 to 1940 |
| 25401-77 | | COVER, clutch, chain guard (Eagle Medallion) | 77 to * - FXS |
| 25414-70 | | COVER, clutch, chain guard | 70 to * - FL, FLH, FX, FXS |
| 25416-70 | | GASKET, chain & clutch cover | 70 to * - FL, FLH, FX, FXS |
| 2543-31 | 37743-31 | Clutch key ring | 1932 to 1940 |
| 2544 | 04 | 4-36 N.S. x 3/8" Round head screw | |
| 2544-34 | 37977-34 | Drive disc with adjusting spring stud | 1934 to 1940 |
| 2544W | | SCREW, No. 4-36 x 3/8 rd. hd | |
| 2547-34 | | Clutch spring compression collar | 1934 to 1940 |
| 2548-40 | 38112-40 | Clutch spring tension adjusting nut | 1940 |
| 2549-34 | 38108-34 | Clutch spring guide stud (4) | 1934 to 1940 |
| 255 | 1548-36 | Timer shaft gear pin | 37 to 57--all twins |
| 255-48A | 22216-48 | Piston with rings & pin. (low compression)-Std | 48 to 52-74" OHV |
| 255-48C | 22217-48 | .005" piston O.S. | 1948 to 1952--74" OHV |