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Yamaha XS400R Parts

Find Yamaha XS400R Seca engine gaskets, carburetor float needles, fork dust seals and front master-cylinder kits. Keep the R designation and exact year when comparing the later Seca with early XS400 and Special parts.

Need a different model? Yamaha XS400 Parts.

Repair examples: XS400R Athena engine gasket set · XS400R carburetor float-needle product. Check the product’s listed model and year.

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Honda Kawasaki Yamaha Suzuki Motorcycle Fork Dust Seals 91254-434-003

Honda Kawasaki Yamaha Suzuki Motorcycle Fork Dust Seals - Replaces Honda OEM 91254-434-003

$24.05
27-1049
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Honda Kawasaki Yamaha Suzuki Motorcycle Fork Dust Seals - Replaces Honda OEM 91254-434-003. This dust seal helps keep dirt and water away from the...
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About the Yamaha XS400R Seca

Parts selection for the later DOHC Seca engine and its distinct chassis.

Yamaha Motorcycle Logo

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.
Need help identifying your part?

Contact PartsNMore with your model, year and clear component photos.

Yamaha XS400R Seca parts by repair

These examples retain their own listed applications. Use the repair category links for your selected model and year, then check the product fitment and package contents.

Restoring or customizing your Yamaha XS400R Seca?

On an XS400R custom build, identify the fitted engine and monoshock chassis before selecting service parts. Check handlebar and mirror changes against the controls, cable movement and full steering clearance.

Custom / Universal parts require measurement and compatibility checks before ordering. They may need modification and are not a confirmed fit for this motorcycle.

Why buy Yamaha XS400R parts from PartsNMore?

Supplying motorcycle parts since 2002. Meet PartsNMore.

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Stock on our shelves

Items marked in stock are held in our warehouse. Orders typically ship the same or next business day.

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USA: order subtotal of $50 USD or more. Canada: orders over $50 CAD. Shipping rates and delivery details.

60-day returns

Eligible unused, unaltered parts in original packaging, with no restocking fee. Electrical parts are excluded. Return conditions.

Ask our parts team with your complete model, year, component markings and clear photos before ordering an uncertain application.

Yamaha XS400R parts questions

What distinguishes the XS400R Seca from an early XS400?
The 1982 Seca introduced a different DOHC twin engine and monoshock chassis. Use the R designation, year and installed-engine identity when ordering; early XS400 or Special applications do not automatically transfer to it.
Does the featured XS400R front master-cylinder kit include 1984?
The selected kit lists XS400R 1982–1983. It does not confirm 1984 R fitment, even though the engine gasket and float-needle examples extend to that year.
Do XS400R fork dust seals also replace the oil seals?
No. The featured dust-seal listing covers XS400R 1982–1983 and protects the fork sealing area from dirt. Oil seals retain fork oil and require a separate application and dimension check.
What should I check before buying an XS400R tank cap?
The featured cap lists XS400R 1982–1983 and is sold individually. Compare the filler-neck shape, locking or latching arrangement, venting and gasket fit to the installed tank, particularly after a tank swap.

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