About the Suzuki GS400
Restoration parts for the early GS400 twin, with separate E, L and S applications.
Suzuki’s archive dates the original GS400 to 1976, with an air-cooled, DOHC two-cylinder engine. The cast-wheel GS400E followed in 1978. Later uses of the GS400 name make the complete designation and year essential when selecting restoration parts.
Early GS400 engine and fork parts; E, L and S service parts
The early engine gasket set here lists GS400 1977–1979, while the fork seals list GS400 1977–1978. The E, L and S collections include later carburetor, control and electrical parts with their own ranges. In particular, the S bowl-gasket entry covers 1980–1981 and 1984–1986, leaving 1982–1983 unconfirmed for that part. Other suffixes also appear on individual products in the wider parent range.
Compare before orderingGS400 repair parts by model and year
Years shown apply to the linked part. Check its full fitment and the component fitted to your motorcycle before ordering.
| Model | Repair part | Listed years | Before ordering |
|---|---|---|---|
| GS400 | Early engine gasket set | 1977–1979 | Base-model entry; compare the fitted engine. |
| GS400 | Early fork oil seals | 1977–1978 | 33 × 46 × 11 mm; narrower years than the gasket set. |
| GS400E | E-model float bowl gasket | 1980–1984 | Individually sold; compare the bowl profile. |
| GS400L | L-model ignition switch | 1980–1982 | Compare mounting, wiring and connector layout. |
| GS400S | S-model float needle and seat | 1980–1981, 1984–1986 | 1982–1983 are not included in this application. |
| GS400S | S-model swingarm bearings | 1981–1982 | This separate application includes 1982. |
Compare GS400E carburetor and reservoir parts, GS400L controls and indicators, or GS400S year-specific repairs.
Identify your motorcycle before orderingGS400 identification checklist
Compare the motorcycle’s identification markings and model-year documents with the components actually fitted.
| Check | What to confirm |
|---|---|
| Model and market | Retain E, L, S or another suffix when present, and confirm the model year rather than registration year alone. |
| Early engine | Use engine markings and gasket outlines to check the GS400 1977–1979 set application. |
| Carburetor | Identify the carburetor body and compare bowl gasket and float-valve parts separately. |
| Chassis changes | Check the fork, swingarm pivot, control perches and electrical connectors actually fitted. |
Contact PartsNMore with the full model, year, frame and engine markings, and photos of the part being repaired.