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

This is the maintenance schedule and associated service intervals for the Yamaha SR400, a throw-back classic that was sold between 2010 and 2021 (in its most recent fuel injected form), when Yamaha stopped production.

The SR400 has been made since 1978 and is still made through 2021, unchanged physically in most ways. These days, it’s considered a retro motorcycle in Europe, the US, and Australia/NZ, where it has been sold since 2014. Yamaha re-released the Yamaha SR400 with a fuel-injected engine since 2010, and that’s the version shown here.

The Yamaha SR400 is powered by a 399cc air-cooled 4-stroke single cylinder SOHC 2-valve engine. Oil is stored in the downtubes of the motorcycle’s frame, which means it doesn’t even have an undercarriage oil sump nor an oil cooler.

Final drive is via a 5-speed gearbox and a chain drive.

The Yamaha SR400 was retired from most markets in 2021. It was retired a little earlier in Europe.

This site has links for things like oil and spark plugs from which we earn a commission (which unfortunately nobody can save, not even us). If you appreciate this work, then please use those links. Thanks!

What you need to service the Yamaha SR400

To service the Yamaha SR400, you need the following consumables. These items meet Yamaha’s recommended spec.

ItemYamaha SR400 spec
Engine oilYamaha recommends Yamalube 10W-40 engine oil.
Oil filterUse a HifloFiltro HF145 oil filter.
Spark plugNGK BPR6ES
Brake fluidCastrol DOT 4
Air filterUse K&N YA-5008 for the fuel-injected SR400.
Cable maintenanceProtect All Cable life to grease control and meter cables
Chain maintenanceMotul Chain Paste for mess-free and convenient chain maintenance
General greaseUse both silicone grease and lithium soap-based grease
Yamaha SR400 maintenance consumables

Yamaha SR400 Maintenance Schedule

Below is the maintenance schedule for the Yamaha SR400.

The Yamaha SR400 has different maintenance requirements in the US and European manuals, as is common with many Yamaha motorcycles.

In the US, the SR400 has 4000 mile / 6000 km or 6 month maintenance intervals.

Yamaha SR400 North America Maintenance Schedule

mi x 100048121620
km x 1000713192531
months612182430Every
Change engine oil — Yamalube 10W40 (warm engine before draining).
Clean engine oil filter element (HF145)
Check spark plug condition, adjust gap and clean
Replace spark plug (BPR6ES)
Replace air filter (YA-5008)12000 mi (19000 km), or more often if riding in rain/dust
Check and adjust valve clearance when engine is cold
Check and adjust engine idle speed
Check timing chain tensioner. Adjust if necessary.
Check decompression system. Replace cable if necessary.
Check chain slack/alignment and condition. Adjust and thoroughly lubricate chain (Motul Chain Paste)300 mi / 500 km, or if it gets wet/dirty
Check fuel hoses for cracks or damage. Replace if necessary
Check clutch operation. Adjust or replace cable.
Lubricate control and meter cables (Protect all cable life)
Check throttle grip operation and free play. Adjust the throttle grip free play, and adjust if necessary. Lubricate the throttle grip housing.
Check front brake operation, fluid level, and for fluid leakage. Adjust break lever free play and replace brake pads if necessary
Check rear brake operation. Adjust cable and replace brake shoes if necessary.
Check brake hoses for cracks or damage, and for correct routing and clamping
Replace brake hoses4 years
Change brake fluid (Castrol DOT 4), and rubber parts of master cylinder/caliper2 years
Check wheels for runout, spoke tightness and for damage. Tighten spokes if necessary.
Check tire tread depth and for damage. Replace if necessary.
Check wheel bearings for smooth operation. Replace if necessary.
Check swingarm bush assemblies for looseness. Lubricate with lithium soap-based grease until new grease shows.
Check steering bearing assembly for looseness.
Repack steering bearings (Lithium soap-based grease)12000 mi (19000 km)
Check all chassis fittings and fasteners. Correct if necessary.
Lubricate brake lever pivot shaft with silicone grease lightly.
Lubricate clutch lever and brake pedal pivot shafts with lithium soap-based grease lightly.
Check centerstand and sidestand pivot operation. Apply lithium-soap-based grease lightly as necessary
Check sidestand switch operation and replace if necessary.
Check front fork operation and for oil leakage. Rebuild / replace if necessary.
Check rear shock absorber operation and for oil leakage. Rebuild / replace if necessary.
Check operation of front and rear brake switches
Check operation of lights, signals, and switches.
Adjust headlight beam.
Check crankcase breather hose for cracks and damage. Replace if necessary
Check exhaust system for leakage. Tighten and/or replace gaskets as necessary.
Check evap control system (if fitted) for damage. Replace if necessary
Yamaha 400 North America Maintenance Schedule

Yamaha SR400 Europe Maintenance Schedule

In Europe, the Yamaha SR400 has with 10000 km / 6000 mile or 12 month service intervals.

km x 100010203040
mi x 10006121824
Change engine oil — Yamalube 10W40 (warm engine before draining).
Clean engine oil filter element
Check spark plug condition, adjust gap and clean
Replace spark plug
Replace air filter20000 km (12500 mi), or more often if riding in rain/dust
Check and adjust valve clearance when engine is cold
Check and adjust engine idle speed
Check timing chain tensioner. Adjust if necessary.
Check decompression system. Replace cable if necessary.
Check chain slack/alignment and condition. Adjust and thoroughly lubricate chain (Motul Chain Paste)500 km / 300 mi, or if it gets wet/dirty
Check fuel hoses for cracks or damage. Replace if necessary
Check clutch operation. Adjust or replace cable.
Lubricate control and meter cables (Protect all cable life)
Check throttle grip operation and free play. Adjust the throttle grip free play, and adjust if necessary. Lubricate the throttle grip housing.
Check front brake operation, fluid level, and for fluid leakage. Adjust break lever free play and replace brake pads if necessary
Check rear brake operation. Adjust cable and replace brake shoes if necessary.
Check brake hoses for cracks or damage, and for correct routing and clamping
Replace brake hoses4 years
Change brake fluid (Castrol DOT 4), and rubber parts of master cylinder/caliper2 years
Check wheels for runout, spoke tightness and for damage. Tighten spokes if necessary.
Check tire tread depth and for damage. Replace if necessary.
Check wheel bearings for smooth operation. Replace if necessary.
Check swingarm bush assemblies for looseness.
Lubricate swingarm with lithium soap-based grease50000 km (30000 mi)
Check steering bearing assembly for looseness.
Repack steering bearings (Lithium soap-based grease)20000 km (12000 mi)
Check all chassis fittings and fasteners. Correct if necessary.
Lubricate brake lever pivot shaft with silicone grease lightly.
Lubricate clutch lever and brake pedal pivot shafts with lithium soap-based grease lightly.
Check centerstand and sidestand pivot operation. Apply lithium-soap-based grease lightly as necessary
Check sidestand switch operation and replace if necessary.
Check front fork operation and for oil leakage. Rebuild / replace if necessary.
Check rear shock absorber operation and for oil leakage. Rebuild / replace if necessary.
Check operation of front and rear brake switches
Check operation of lights, signals, and switches.
Adjust headlight beam.
Check exhaust system for leakage. Tighten and/or replace gaskets as necessary.
Check the air cut-off valve, reed valve, and hose for damage. Replace damaged partsYear
Yamaha SR400 Europe Maintenance Schedule

About the Yamaha SR400

Yamaha SR400 being ridden
Yamaha SR400 being ridden

The Yamaha SR400 is a retro motorcycle. It has an upright naked riding position and is quite comfortable, and very easy to ride.

The SR400 is powered by 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.

In fact, the Yamaha SR400 doesn’t even come with an electric starter — just a kick start. 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 find that there are times when kick starting can get a litlte old.

The engine is no monster, producing 24 horsepower (around 15 kW). 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, pottering about at low speed.

In 2021 Japan announced a “final edition” of the SR400, meaning it was being retired.

Maintaining the Yamaha SR400 is very easy thanks to its single cylinder, fully exposed engine, and affordable parts. You mostly have to change the oil and keep the chain lubricated.

There is a mandatory valve service every 4000 miles or 10000 km (depending on whether you follow the North American or European maintenance schedule), but doing your own valve service is not hard for the vaguely maintenance-minded considering it only has one cylinder and two valves.

Manual for the Yamaha SR400

The above information was gleaned from the owner’s manual for the Yamaha SR400. We compared the 2017 manual from the US and the 2016 manual from Europe with manuals for other years.

See the screenshots to observe the differences between the USA and Europe maintenance schedules.

You can download the manual for the Yamaha SR400 from Yamaha’s website here.

Similar Posts