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Yamaha SR400 (2010-2021) Maintenance Schedule and Service Intervals

2016-2018 Yamaha SR400

This is the maintenance schedule and associated service intervals for the Yamaha SR400, a throw-back classic that has been sold since 2010 in most western markets.

The SR400 has been made since 1978 and is still made through 2021, largely unchanged. These days its considered a retro throwback in Europe, the US, and Australia/NZ, where it has been sold since 2014. It has been fuel injected since 2010, and that’s the version shown here.

Just in case you thought fuel injection was too modern… the SR400 still has a kickstarter. And only a kickstarter.

The Yamaha SR400 was retired from most markets in 2021.

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Yamaha SR400 Maintenance Schedule

Below is the maintenance schedule for the Yamaha SR400.

The maintenance for the Yamaha SR400 is broken into two sections: periodic maintenance for emission control systems, and general maintenance and lubrication.

Periodic Maintenance Emission Control System

TIP:

  • The maintenance schedule for is from the US manual, but the European intervals are shown in km — they don’t match up exactly..
  • After 16,000 miles or 40,000 km, keep repeating the maintenance schedule every two intervals.
  • Yamaha suggests you only lube the chain, grease external points, and change the oil, and take everything else to a dealer (not likely…)
x 1000 mi (US)0.648121620
x 1000 km (Europe/Aust/NZ)110203040
Itemmonth1712182430
Fuel line•Check fuel hoses for cracks or damage.
•Replace if necessary.
Spark plugs•Check condition.
•Adjust gap and clean.
•Replace
Valve clearance•Check and adjust valve clearance when engine is cold
Crankcase breather system•Check breather hose for cracks or damage.
•Replace if necessary.
Fuel injection•Check engine idle speed
Exhaust system•Check for leakage
•Tighten if necessary
•Replace gasket(s) if necessary
Evaporative emission control system (CA only)•Check control system for damage.
•Replace if necessary.
Air induction system•Check the air cut-off valve, reed valve, and hose for damage
•Replace any damaged parts if necessary
Yamaha SR400 maintenance — Emissions

General Maintenance and Lubrication Chart

Maintenance notes from manual:

  • Air filter
    • This model’s air filter is equipped with a disposable oil-coated paper element, which must not be cleaned with compressed air to avoid damaging it
    • The air filter element needs to be replaced more frequent when riding in unusually wet or dusty areas
  • Hydraulic brake service
    • After disassembling the brake master cylinders and calipers, always change the fluid. Regularly check the brake and clutch fluid levels and fill the reservoirs as required
    • Every two years replace the internal components of the brake master cylinders and calipers, and change the brake fluid
    • Replace the brake hoses every four years or if cracked or damaged.
x 1000 mi (US)0.648121620
x 1000 km110203040
Itemmonth1712182430
Air filter element•Replace
Timing chain•Check timing chain tensioner
•Adjust if necessary
Clutch•Check operation
•Adjust or replace cable
Decompression system•Check operation
•Replace cable if necessary
Front brake•Check operation, fluid level, and for fluid leakage
•Replace brake pads if necessary
Rear brake•Check operation
•Adjust brake pedal free play and replace brake shoes if necessary
Brake hose•Check for cracks or damage
•Check for correct routing and clamping
•Replace (every 4 years)
Brake fluid•Change (every 2 years, use DOT 4)
Wheels •Check runout and for damage
•Tighten spokes if necessary
Tires•Check thread depth and for damage
•Replace if necessary
•Check air pressure
•Correct if necessary
Wheel bearings•Check bearings for smooth operation
•Replace if necessary
Swingarm pivot bushes•Check bush assemblies for looseness
•Lubricate with lithium-soap-based grease
Drive chain — every 500 km (300 mi) or after washing or riding in wet/rain•Check chain slack, alignment and condition
•Adjust and lubricate chain (Motul chain paste)
Steering bearings•Check bearing assembly for looseness
•Moderately repack with lithium-soap-based grease periodically
Chassis fasteners•Check all chassis fittings and fasteners
•Correct if necessary
Brake lever pivot shaft•Apply silicone grease lightly
Brake pedal pivot shaft•Apply lithium-soap-based grease lightly
Clutch lever pivot shaft•Apply lithium-soap-based grease lightly
Centerstand and sidestand pivot•Check operation
•Apply lithium-soap-based grease lightly
Sidestand switch•Check operation and replace if necessary
Front fork•Check operation and for oil leakage.
•Replace if necessary.
Shock absorber assemblies•Check operation and for oil leakage.
•Replace if necessary.
Engine oil•Change (warm engine before draining)
Engine oil filter element• Replace.
Front and rear brake switches•Check operation
Control and meter cables•Apply Yamaha chain lubricant or other suitable cable lubricant thorougly
Throttle grip •Check operation and free play
•Adjust throttle cable free play and adjust if necessary.
•Lubricate cable and grip housing and cable
Light, signals and switches•Check operation
•Adjust headlight beam
Yamaha SR400 maintenance – regular maintenance

About the Yamaha SR400

The Yamaha SR400 is a retro motorcycle with an air-cooled four-stroke single cylinder 2-valve engine with a dry sump. It’s fuel-injected, but that’s about the only technology you’ll find on it these days. No, it doesn’t come with ABS!

It’s so retro that it doesn’t even come with an electric starter. Some people see this as a pro (you can start it when the starter dies! Also, there’s no sprag clutch to renew), but many owners say that kick starting their bike every time gets old.

The engine is no monster, producing 24 horsepower and even fewer kilowatts. However, most of the 15 Nm (21 lb-ft) of torque comes on early, with near maximum torque at 2,500 rpm, making the Yamaha SR400 very easy to ride in traffic.

In 2021 Japan announced a “final edition” of the SR400, meaning it was being retired. It just didn’t prove popular in developed markets.

Manual for the Yamaha SR400

2016-2018 Yamaha SR400 Maintenance schedule screenshot from manual

The above information was gleaned from the owner’s manual for the Yamaha SR400.

You can download it from Yamaha’s website here.

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