| IR 231XP, 231XP-2 Parts List |
| Item | PartNumber | PartDescription | IREquivalent |
| 1 | | Motor Housing | 231XP-B40 |
| 2 | 9599 | Throttle Valve Seat | 235-303 |
| 3 | | Warning Label | WARNING-2-99 |
| 4 | | Grease Fitting | 130SR-188 |
| 5 | | Reverse Valve Bushing | 231-A330 |
| | Bushing | |
| 6 | 8400 | ReverseValve Bushing Seal | PS3-67 |
| 7 | 8306 | Reverse Valve | 231-329A |
| 8 | 8282 | Reverse Valve Detent Ball | AV1-255 |
| 9 | 8308 | Reverse Valve Detent Spring | 231-664 |
| 10 | 8309 | Reverse Valve Knob | 231-666 |
| 11 | 8310 | Reverse Valve Screw | 231-665 |
| 12 | | Inlet Bushing | 235-565 |
| 13 | | Exhaust Deflector | 235-EU-23 |
| 14 | 9598 | Throttle Valve Spring | 235-51 |
| 15 | 8666 | Throttle Valve | 235-50 |
| 15A | | Exhaust Silencer for 231XPS & 231XPS-2ONLY | 235-311 |
| 16 | | Trigger | 231H-93 |
| 17 | | Throttle Rod | 235-302 |
| 18 | | Nameplate | 231XP-301 |
| 19 | | Trigger Retainer | 231H-656 |
| 21 | 8032B | End Plate Gasket | 231-283 |
| 22 | 8004 | Rear Rotor Bearing Retainer | 402-118 |
| 23 | 8027 | Rear Rotor Bearing | 402-22 |
| 24 | 8085 | Rear End Plate | 231-12 |
| 25 | 8263 | Rotor | 231-53 |
| 26 | 2189 | Vane, Yellow (set of 6) | 2131-42-6 |
| 27 | | Cylinder | 231XP-3 |
| 28 | 8084 | Front End Plate | 231-11 |
| 29 | 8340 | Cylinder Dowel | 230-98 |
| 30 | 8028 | Front Rotor Bearing | 4U-97 |
| 31 | 8311 | Motor Clamp Washer (2) | 227-207 |
| 32 | 8087 | Hammer Frame Rear Washer | 231-706 |
| 33 | 9243 | Hammer Frame | 2131-703 |
| 34 | 8079 | Hammer Pin (2) | 231-704 |
| 35 | 8132 | Hammer (2) | 231XP-724 |
| 36 | | Anvil Assembly (231XP and 231XPS ONLY) | 231B-A626 |
| 36 | 8022 | Anvil Assembly (231XP-2 and 231XPS-2 ONLY) (2"Extended) | 231B-A414 |
| 37 | 8270 | Retainer O-Ring | R1A-159 |
| 38 | 8088 | Socket Retainer | 231-425A |
| 39 | 8082 | Hammer Case Assembly | 705-A927 |
| 40 | 8032A | Hammer Case Gasket | 230-36 |
| 41 | 8312 | Hammer Case Pilot | 405-800 |
| 42 | 8320 | Hammer Case Bushing | 705-941 |
| 43 | 8151 | Hammer Case Cap Screw (3) | 231-638 |
| | Grease Applicator | 230-228 |
| | Oil | 405-MO1 |
| | Grease | 405-MG1 |
| 9972 | Tune Up Kit (Includes: 2, 6[2], 8, 9, 14, 15,15A, 21, 22, 23, 26, 30, 37, 38, and 40) | 231XP-TK1 |