| Ref | Part Number | Description |
|---|---|---|
| 1 | 420431420 | Gasket 0.5 mm |
| 1 | 420431421 | Gasket 0.6 mm |
| 1 | 420431422 | Gasket 0.7 mm |
| 1 | 420431423 | Gasket 0.8 mm |
| 1 | 420431424 | Gasket 0.9 mm |
| 2 | 420613628 | Cylinder With Sleeve |
| 3 | 420854371 | Exhaust Valve |
| 4 | 420950732 | Oil Seal This part replaces 420950730. |
| 5 | 420250239 | Gasket |
| 6 | 420854266 | Valve Housing |
| 7 | 420440207 | Torx Flange Screw M6 X 20 |
| 8 | 420260723 | Exhaust Bellows |
| 9 | 420838255 | Hose Spring |
| 10 | 420854449 | Exhaust Valve |
| 11 | 420939281 | Hose Spring This part replaces 420939280. |
| 12 | 420239954 | Spring This part replaces 420239944. |
| 13 | 420911552 | Valve Cover |
| 14 | 420241221 | Adjuster Screw |
| 15 | 420841555 | Hex. Tapping Screw M5 X 20 |
| 16 | 420640959 | Collar Hex Screw M8 X 68.5 This part replaces 420640951. |
| 17 | 420931590 | Rubber Ring |
| 18 | 293300026 | O-Ring |
| 19 | 420413011 | Cylinder Head Cover |
| 20 | 420924724 | Hose Nipple |
| 21 | 420841307 | Hex. Collar Screw M8 X 65 This part replaces 420841306. |
| 22 | 420941627 | Hex. Screw M8 X 56.5 |
| 24 | Not | Available As Spare Part - Reed Valve |
| 25 | 420924532 | Reed Pedal |
| 26 | 420924539 | Reed Pedal Stop |
| 27 | 420941215 | Phillips Screw M3 X 5 |
| 28 | 420667490 | Intake Socket |
| 29 | 420941928 | Taptite Screw M5 X 16 This part replaces 420941925. |
| 30 | 420931610 | Gasket |
| 31 | 420673131 | Exhaust Manifold |
| 32 | 420923443 | Cylinder Sleeve |
| 33 | 420893070 | Gasket Set, Engine |