Yamaha XS400 Parts | Special & Seca Model Guide | PartsNMore

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Yamaha XJ650 XS1100 XS400 XS750 Caliper Rebuild Kit

$20.72

Yamaha XJ650 XS1100 XS400 XS750 Caliper Rebuild Kit. This brake-caliper rebuild kit renews the caliper piston seals and related service pieces to restore hydraulic...

In stock

Yamaha XS1100 XS400 XS500 XS750 Caliper Piston 38 x 41.3 45107-371-006

Yamaha XS1100 XS400 XS500 XS750 Caliper Piston - 38 x 41.3 - Reference: 45107-371-006

$42.62

Yamaha XS1100 XS400 XS500 XS750 Caliper Piston - 38 x 41.3 - Reference: 45107-371-006. This brake-caliper piston fits the matching front or rear brake...

In stock

Yamaha XS1100 XS400 XS500 XS750 Caliper Rebuild Kit

$26.64

Yamaha XS1100 XS400 XS500 XS750 Caliper Rebuild Kit. This brake-caliper rebuild kit renews the caliper piston seals and related service pieces to restore hydraulic...

In stock

Honda Yamaha Motorcycle Caliper Piston 38 x 41.3 45107-371-006

Honda Yamaha Motorcycle Caliper Piston - 38 x 41.3 - Replaces Honda OEM 45107-371-006

$42.62

Honda Yamaha Motorcycle Caliper Piston - 38 x 41.3 - Replaces Honda OEM 45107-371-006. This brake-caliper piston fits the matching front or rear brake...

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Yamaha XS400 XS4002 SR250 IT125 Brake Lever 2K6-83922-00

Yamaha XS400 XS4002 SR250 IT125 Brake Lever - Replaces Yamaha OEM 2K6-83922-00

$7.62

Yamaha XS400 XS4002 SR250 IT125 Brake Lever - Replaces Yamaha OEM 2K6-83922-00. This brake lever operates the front master cylinder or cable-actuated brake mechanism...

In stock

Yamaha RD350 XJ1100 XJ550 XJ650 Brake Lever 2J2-83922-20

Yamaha RD350 XJ1100 XJ550 XJ650 Brake Lever - Replaces Yamaha OEM 2J2-83922-20

$9.62

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Yamaha RD350 XJ1100 XJ550 XJ650 Brake Lever - Replaces Yamaha OEM 2J2-83922-20. This brake lever operates the front master cylinder or cable-actuated brake mechanism...

In stock

Yamaha XJ750 XS400 XV500 XT500 Front Friction Pads 22U-W0045-10

Yamaha XJ750 XS400 XV500 XT500 Front Friction Pads - Replaces Yamaha OEM 22U-W0045-10

$27.31

Yamaha XJ750 XS400 XV500 XT500 Front Friction Pads - Replaces Yamaha OEM 22U-W0045-10. This front brake-pad set provides the friction material for the disc...

In stock

Yamaha RD400 XS400S Friction Pads 3J6-W0045-01

Yamaha RD400 XS400S Friction Pads - Replaces Yamaha OEM 3J6-W0045-01

$31.08

Yamaha RD400 XS400S Friction Pads - Replaces Yamaha OEM 3J6-W0045-01. This brake-pad set provides the friction material for the disc brake caliper and rotor....

In stock

Yamaha XS1100 XS400 XS500 XS750 Friction Pads 3G1-W0046-01

Yamaha XS1100 XS400 XS500 XS750 Friction Pads - Replaces Yamaha OEM 3G1-W0046-01

$29.60

Yamaha XS1100 XS400 XS500 XS750 Friction Pads - Replaces Yamaha OEM 3G1-W0046-01. This brake-pad set provides the friction material for the disc brake caliper...

In stock

Yamaha XJ650 XS1100 XS360 XS400 Friction Pads 3G1-W0046-01

Yamaha XJ650 XS1100 XS360 XS400 Friction Pads - Replaces Yamaha OEM 3G1-W0046-01

$29.60

Yamaha XJ650 XS1100 XS360 XS400 Friction Pads - Replaces Yamaha OEM 3G1-W0046-01. This brake-pad set provides the friction material for the disc brake caliper...

In stock

Yamaha XS400 XS360 XJ550R YFM350FW YFM350U YFM400F YFM400FW Rear Friction Shoes 4G0-25330-00

Yamaha Motorcycle ATV Rear Friction Shoes - Replaces Yamaha OEM 4G0-25330-00

$32.78

Yamaha Motorcycle ATV Rear Friction Shoes - Replaces Yamaha OEM 4G0-25330-00. This rear brake shoe set provides the friction surface for the drum brake...

In stock

Yamaha XJ650 XS1100 XS360 XS400 Caliper Rubber Boot

$14.21

Yamaha XJ650 XS1100 XS360 XS400 Caliper Rubber Boot. This brake-caliper rubber boot protects the matching front or rear caliper guide, shaft, or moving joint...

In stock

Yamaha XS360 XS400 XS500 XS850 Caliper Rebuild Kit

$26.64

Yamaha XS360 XS400 XS500 XS850 Caliper Rebuild Kit. This brake-caliper rebuild kit renews the caliper piston seals and related service pieces to restore hydraulic...

In stock

Yamaha XJ550 XS360 XS400 XS500 Front Master Cylinder Repair Kit

$31.67

Yamaha XJ550 XS360 XS400 XS500 Front Master Cylinder Repair Kit - Replaces Yamaha OEM 535-W0041-60. This front master-cylinder repair kit renews the hydraulic master...

In stock

Yamaha XJ550 XS400 XV250 XV500 Front Master Cylinder Repair Kit

$32.78

Yamaha XJ550 XS400 XV250 XV500 Front Master Cylinder Repair Kit - Replaces Yamaha OEM 4LO-W0041-00. This front master-cylinder repair kit renews the hydraulic master...

In stock

Yamaha XS400 XS500 XS750D Brake Lever 1J3-83922-10

Yamaha XS400 XS500 XS750D Brake Lever - Replaces Yamaha OEM 1J3-83922-10

$8.14

Yamaha XS400 XS500 XS750D Brake Lever - Replaces Yamaha OEM 1J3-83922-10. This brake lever operates the front master cylinder or cable-actuated brake mechanism from...

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About the Yamaha XS400

Separate the early XS400 and Special applications from the later Seca before ordering.

The XS400 name spans more than one Yamaha twin. The 1982 Seca introduced a different DOHC engine and monoshock chassis. An XS400 badge and an approximate year therefore cannot identify the engine gasket, carburetor or brake parts fitted to every version.

Use this family page to choose a model, then move to the repair. The early overhaul gasket set lists XS400 1977–1981 and XS400S 1980–1982. The separate Athena set lists XS400R 1982–1984 and later XS400 applications. Those are different engine-service products, with their own fitment lines.

Choose the correct model and applicationYamaha XS400 model and repair differences

Early XS400

Carburetor and engine service

The carburetor-kit example covers XS400 1977–1979. The early overhaul gasket set extends to 1981; that later gasket coverage does not extend the carb kit.

XS400S

Special applications

The S collection has its own brake and clutch applications. Keep XS400S in the selection rather than assuming an unsuffixed XS400 listing covers the same parts.

XS400R

Seca engine and chassis

Use the R collection for the later Seca examples, including its separate engine gasket set and front master-cylinder kit. A shared dust seal does not establish complete fork interchange.

Frame, engine and fitted componentsYamaha XS400 identification checklist

Record both frame and engine identity; a replacement engine can require a different gasket family.
Check the complete model designation and market against the correct Yamaha manual. Do not treat an S or R suffix as optional.
Identify the carburetor body and fuel-valve arrangement before selecting a kit or float needle.
Record front and rear brake type separately, then compare the actual caliper or drum and fork-seal dimensions.

Need help identifying your part?

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

Yamaha XS400 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.

Early carburetor rebuild

XS400 carburetor rebuild kit. The application lists XS400 1977–1979. Compare the fitted carburetor and the included service pieces; a kit is not automatically a complete pair-of-carburetors overhaul package.

More Yamaha XS400 carburetor parts

Early and S-model engine gaskets

XS400 / XS400S overhaul gasket set. Listed for XS400 1977–1981 and XS400S 1980–1982. Identify the engine and the joints being opened before comparing the supplied gaskets.

More Yamaha XS400 engine parts

R-model engine gaskets

XS400R Athena engine gasket set. The R application is 1982–1984. It is a separate choice from the early XS400/S overhaul set; check the complete product fitment for other XS400 entries.

More Yamaha XS400 engine parts

Fork oil seals

Early XS400 fork oil seal set. Listed for XS400 1977–1982. Compare the full seal dimensions and height profile with the installed fork. This oil-seal product does not supply external dust seals.

More Yamaha XS400 suspension parts

Rear drum brake shoes

XS400 and XS400S rear brake shoes. The listing names XS400 1982–1983 and XS400S 1980–1981. Match the rear drum and shoe profile; do not extend those entries to XS400R solely because it is in this family.

More Yamaha XS400 brake parts

Restoring or customizing your Yamaha XS400?

For an XS400 café or street build, identify the engine and front end before ordering service parts. A change of bars, wheels or forks can alter cable reach, brake requirements and seal dimensions.

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 XS400 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.

Free ground shipping

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 XS400 parts questions

Are all Yamaha XS400 engine gasket sets interchangeable?

No. The early overhaul set lists XS400 1977–1981 and XS400S 1980–1982, while the separate Athena set includes XS400R 1982–1984. Identify the fitted engine and check the exact product application; a shared 400 name is insufficient.

Should I choose XS400, XS400S or XS400R in the selector?

Use the complete model designation from the motorcycle and its documentation. Keep the S and R entries separate. If the bike has a replacement engine or front end, identify that assembly separately before selecting its parts.

Does the early XS400 carburetor kit cover 1980 or 1981?

The featured carburetor rebuild kit lists XS400 1977–1979. It does not establish 1980 or 1981 coverage. A gasket set with later engine applications does not extend the carb kit's fitment.

Are XS400 fork dust seals the same as oil seals?

No. Oil seals retain fork oil; dust seals protect the sealing area from contamination. Each has its own dimensions and fitment. A shared dust-seal application does not prove that the oil seals or complete forks interchange.

Browse parts

Choose your Yamaha XS400 model

Yamaha XJ650 XS1100 XS400 XS750 Caliper Rebuild Kit

Yamaha XS1100 XS400 XS500 XS750 Caliper Piston - 38 x 41.3 - Reference: 45107-371-006

Yamaha XS1100 XS400 XS500 XS750 Caliper Rebuild Kit

Honda Yamaha Motorcycle Caliper Piston - 38 x 41.3 - Replaces Honda OEM 45107-371-006

Yamaha XS400 XS4002 SR250 IT125 Brake Lever - Replaces Yamaha OEM 2K6-83922-00

Yamaha RD350 XJ1100 XJ550 XJ650 Brake Lever - Replaces Yamaha OEM 2J2-83922-20

Yamaha XJ750 XS400 XV500 XT500 Front Friction Pads - Replaces Yamaha OEM 22U-W0045-10

Yamaha RD400 XS400S Friction Pads - Replaces Yamaha OEM 3J6-W0045-01

Yamaha XS1100 XS400 XS500 XS750 Friction Pads - Replaces Yamaha OEM 3G1-W0046-01

Yamaha XJ650 XS1100 XS360 XS400 Friction Pads - Replaces Yamaha OEM 3G1-W0046-01

Yamaha Motorcycle ATV Rear Friction Shoes - Replaces Yamaha OEM 4G0-25330-00

Yamaha XJ650 XS1100 XS360 XS400 Caliper Rubber Boot

Yamaha XS360 XS400 XS500 XS850 Caliper Rebuild Kit

Yamaha XJ550 XS360 XS400 XS500 Front Master Cylinder Repair Kit

Yamaha XJ550 XS400 XV250 XV500 Front Master Cylinder Repair Kit

Yamaha XS400 XS500 XS750D Brake Lever - Replaces Yamaha OEM 1J3-83922-10

About the Yamaha XS400

Choose the correct model and applicationYamaha XS400 model and repair differences

Carburetor and engine service

Special applications

Seca engine and chassis

Frame, engine and fitted componentsYamaha XS400 identification checklist

Yamaha XS400 parts by repair

Early carburetor rebuild

Early and S-model engine gaskets

R-model engine gaskets

Fork oil seals

Rear drum brake shoes

Restoring or customizing your Yamaha XS400?

Why buy Yamaha XS400 parts from PartsNMore?

Stock on our shelves

Free ground shipping

60-day returns

Yamaha XS400 parts questions

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