About the Yamaha XS400R Seca
Parts selection for the later DOHC Seca engine and its distinct chassis.
The 1982 Seca 400 introduced a 399cc DOHC twin, Yamaha's YICS intake system and monoshock rear suspension. Its engine and chassis differ from the earlier XS400. Those differences make the R model code useful for more than identification: they change which gasket, carburetor and suspension applications belong on the order.
The featured Athena engine gasket set and float-needle product list XS400R 1982–1984. The front master-cylinder kit, fork dust seals and tank-cap examples list 1982–1983. Keep those limits attached to each repair part instead of treating every item as a three-year application.
Choose the correct model and applicationYamaha XS400R Seca model and repair differences
XS400R 1982–1983
Engine, fuel and chassis examples
The linked master-cylinder kit, dust seals and cap name these R years. Match their dimensions and mounting details to the components on the bike.
XS400R 1984
Engine gasket and float-needle entries
The selected gasket set and float-needle listing include 1984. The earlier chassis examples need separate confirmation for that year.
Early XS400 / XS400S
Different repair selections
Return to the family guide to compare the early overhaul set and S-specific brake examples. A similar badge does not confirm engine interchange.
Frame, engine and fitted componentsYamaha XS400R Seca identification checklist
- Record the frame/VIN, engine marking and complete R-model designation against the matching documentation.
- Identify the fitted DOHC engine before selecting the gasket set; distinguish engine changes from cosmetic changes.
- For fuel-level problems, record the carburetor body marking and compare the needle tip, seat and sealing arrangement.
- For front brake work, match the master-cylinder bore and piston/seal design; for dust seals, compare the actual fork profile.
Contact PartsNMore with your model, year and clear component photos.