Triumph Street Twin (2021-2022) Maintenance Schedule
This is the maintenance schedule with associated service intervals for the Triumph Street Twin motorcycle, launched in 2021 to replace the 2017-2020 Triumph Street Twin.
The maintenance schedule for the Triumph Street Twin is very similar to those for other motorcycles with similar engines in the Triumph Modern Classics, notably the Triumph Bonneville T100 (2021-2022).
Like the outgoing model, the Triumph Street Twin (2021-2022) is based on a 900cc liquid-cooled parallel twin with a 270-degree crank. It’s a sporty, basic roadster, with a single front disc brake and a single gauge which doesn’t include a tachometer.
Despite the similar design, Triumph made some significant updates to the maintenance schedule for the 2021 model year.
Triumph renamed the Street Twin to the Triumph Speed Twin 900 from the 2023 model year, not to be confused with the larger Speed Twin 1200.
This was originally published 30 July, 2021, but has since been significantly updated with more detail and updates to the maintenance schedule.
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Triumph Street Twin Service Intervals
The Triumph Street Twin has 10 000 mile / 16 000 km or annual service intervals. At every service, you change the oil and oil filter, change the air filter, and do a list of checks.
The service schedule is similar to the 2016-2020 Street Twin, but Triumph simplified it a bit. For example, they no longer suggest you check the spark plugs at every service.
The valve service interval for the Street Twin is every two services, or 20000 miles / 32000 km. That’s also the point at which you change the spark plugs.
Since the Street Twin has a liquid-cooled engine, make sure you keep the coolant up to date. And replace the brake fluid per the schedule.
You may need to service your Street Twin more frequently if you ride it aggressively, e.g., if you enjoy winding roads or track days!
What you need to service the Triumph Street Twin (2021-2022)
Servicing the Triumph Street Twin is just like servicing another modern British 900cc twin. You need the below parts and consumables for a standard maintenance job.
|Part||Triumph 900cc Street Twin spec|
|Oil||Triumph recommends 10W/40 or 10W/50 semi or fully synthetic motorcycle engine oil that meets specification API SH (or higher) and JASO MA, such as Castrol Power 1 Racing 4T 10W-40 (fully synthetic) engine oil, sold as Castrol Power RS Racing 4T 10W-40 (fully synthetic) in some countries. A high-quality alternative is Motul 7100.|
|Oil filter||Replace the oil filter every time you change the oil. Use Triumph part number T1218001, which fits a lot of Triumph motorcycles. You can also use Hiflofiltro HF204RC which has a neat nut on the end.|
|Brake fluid||Triumph motorcycles need DOT 4 brake fluid (the 900cc range has a clutch cable, so you don’t need fluid for the clutch).|
|Coolant||Triumph uses Hybrid Organic Acid Technology coolant with a 50% ethylene glycol mix. Zerex Asian Vehicle Coolant is a HOAT coolant that meets this spec.|
|Front brake pads||Standard brake pads code is T2026565 (for the Brembo caliper). The part number for EBC brakes is FA322/4HH.|
|Rear brake pads||Use original part number T2022955. The equivalent part number for EBC brakes is FA214/2HH.|
|Spark plugs||NGK code LMAR8A-9. Note they’re sold individually. Make sure they’re gapped to 0.9mm (+0.0-0.1mm) with an appropriate spark plug gap tool.|
|Air filter||The part number for the air filter is T2201057. You can also use K&N part TB-9016.|
Maintenance Schedule for Triumph Street Twin (2021-2022)
We’ve split the maintenance schedule for the Street Twin into three parts:
- Daily / pre-ride checks
- The service schedule
- The annual service checklist.
Daily / Pre-ride checks
Do the following safety checks daily or before rides. Also perform these at the time of your scheduled service.
|Triumph Street Twin – Daily / Pre-ride checks|
|Engine – check for leaks|
|Cooling system – check for leaks|
|Coolant level – check/adjust|
|Clutch – check operation and free play.|
Clutch free play: 2-3mm
|Tire wear/tire damage – check|
|Tire pressures – check/adjust |
See below or tire pressures
|Wheels – inspect for damage|
|Steering – check for free operation|
|Front and rear suspension – check for damage, leaks, and smooth operation|
|Brake system – check operation (easy lever operation, no stuck calipers) and for leaks|
|Brake pads – check wear levels|
|Brake fluid levels – check|
|Drive chain slack – check/adjust |
See below for guidance
|All lights, instruments and electrical systems – check/adjust|
|Bank angle indicators – check for wear|
|Side stand/Center stand – check for wear / smooth operation. Lubricate as necessary|
Annual service items
Below is the list of items to be done at every service, according to the schedule.
- [T] Some maintenance items are only able to be done by a Triumph mechanic with all the Triumph official tools.
|Triumph Street Twin (2021-2022) standard annual service checklist|
|[T] Autoscan – Carry out a full Autoscan using the Triumph Diagnostic Tool|
|[T] Instruments, chassis ECM (if equipped) and engine ECM – check for latest calibration|
|Clutch lever pivot – Lubricate (Lithium soap-based grease)|
|Cooling system – check coolant hoses for chafing/ cracks/ damage. Replace if necessary.|
|Fuel system – check for leaks, chafing etc. (Not strictly required annually if limited mileage done, but trivial to perform)|
|Drive chain rubbing strips – check for wear, cracks or damage|
|[T] Carry out all outstanding Service Bulletin and warranty work (Triumph mechanics only)|
|Carry out road test|
|[T] Complete the service record book and reset the service indicator|
Below is the scheduled maintenance for the Triumph Street Twin. Do the daily maintenance items along with the following.
- At the end of the maintenance schedule, continue it in the pattern shown (everything is every 1, 2, or 4 service intervals)
- The break-in schedule is omitted as this bike is no longer sold new.
|Miles x 1000||10||20||30||40|
|Km x 1000||16||32||48||64||Every|
|Perform all daily checks (see above)||✓||✓||✓||✓||Year|
|Perform all annual service items (see above)||✓||✓||✓||✓||Year|
|Engine oil – replace (Castrol Power 1 Racing 4T 10W-40)||✓||✓||✓||✓||Year|
|Engine oil filter – replace (HF204RC)||✓||✓||✓||✓||Year|
|Air filter – replace (TB-9016)||✓||✓||✓||✓|
|Spark plugs – replace (NGK LMAR8A-9)|
No requirement to check spark plugs between services
|Valve clearances – check / adjust||✓||✓|
|Camshaft timing – check||✓||✓|
|Fuel filter – replace||✓||✓|
|Fork oil – replace||✓|
|Steering head bearings (headstock bearings) – check / adjust, or lubricate as needed (use lithium soap-based grease)||✓||✓|
|Wheel bearings — Check for wear / smooth operation||✓||✓|
|Brake fluid – replace (Castrol DOT 4)||2 years|
|Coolant – replace (Triumph HD4X or an alternative)||3 years|
Chain maintenance on the Street Twin
Below are the chain maintenance items for the Triumph Street Twin (and all Triumph chain-driven motorcycles).
|Chain maintenance item||Every|
|Drive chain – wear check||500 miles (800 km)|
|Drive chain – lubricate (Motul chain paste)||200 miles (300 km)|
(Or after riding in rain or washing motorcycle)
When checking for wear, check for sticking parts of the chain, broken / rounded off teeth, and rust.
Triumph recommends you also regularly check the chain slack on your Street Twin and adjust as necessary.
How to check chain slack on a Triumph Street Twin
Every brand of motorcycle measures chain slack differently. For the Street Twin, slack is the free vertical movement of the center part of the bottom chain segment.
- You need a ruler (or tape measure) and nitrile gloves or a rag (to avoid getting grease on your hands)
- Put the motorcycle in neutral, on a level service, and elevate the rear wheel with a stand or center stand if you have one fitted.
- Rotate the wheel and find the tightest part of the chain, in the middle.
- Use a finger to lightly push the chain up and down. Measure the deflection, which is the chain slack.
Target chain slack: 20-30 mm (0.8 – 1.2 in)
How to adjust chain slack on the Street Twin
The procedure is similar to on many motorcycles, but of course specifics vary between brands. It’s the same as on other Modern Classics, however.
You need wrenches and torque wrenches to re-tighten the rear wheel. You particularly need a large torque wrench for the rear axle.
- Keep the motorcycle’s rear wheel elevated.
- Loosen the rear axle nut.
- Loosen the lock nuts on the left and hand side.
- Turn the adjuster bolts, usually counter-clockwise, extending the bolt “outward” to lengthen the chain and make it tighter. (Sometimes you’ll want to make it looser — in those cases, turn it clockwise / inward)
- Make sure to adjust the bolts the same amount on each side — check the markings.
- Tighten both adjuster nuts to 15 lb-ft / 20 Nm, and the rear axle nut to 81 lb-ft / 110 Nm (“very tight”).
About the Triumph Street Twin (2021)
The 2021 Triumph Street Twin was largely a EURO 5 update to the original Street Twin, but it brought with it a new manual and maintenance schedule for the motorcycle, which is reproduced above.
At its core, the Street Twin is largely the same. It’s still a “street”-focused motorcycle that’s very simple in nature – based on a 900cc parallel twin fuel-injected liquid-cooled motor with a 270-degree crankshaft giving it a nice exhaust note and torque-friendly power delivery. Power is largely unchanged — one horsepower less on the official specs, but details like that are lost in dyno checks and street roll-on tests.
There’s a single dial and a round headlight, keeping things simple.
But the new 2021 Triumph Street Twin hides a few changes under the hood. Triumph says the engine has a lighter crankshaft, balance shafts, and magnesium engine cover, giving the Street Twin a slight weight loss of 4kg over the outgoing models, and a little more of a free-revving nature.
Additionally, there are some really stylish new colour schemes, like the “Gold Line” — an instant classic. Bikes like the Street Twin need to look good as well as go well, and it achieves this with aplomb.
The Street Twin has standard ABS and traction control, as well as two ride modes — rain and road. These adjust both the throttle map and traction control settings.
Aside from that, the Street Twin is as simple as it ever was. The “high-torque” 900cc engine makes 80 Nm (59 ft-lb) peak torque at 3800 rpm, and 64 hp (47 kW) at 7500 rpm. It’s a modestly-powered machine, but on the Street Twin it seems ample.
The front brake caliper is just a single unit, but it’s a Brembo 4-piston caliper. Suspension is mostly non-adjustable, but the rear shocks do have preload adjustability.
In 2021, the Street Twin also came in a stylish EC1 trim.
In 2022, Triumph announced the replacement for the Street Twin as the Triumph Speed Twin 900 for model year 2023, renamed to show that it’s in the same bloodline as the Speed Twin 1200. The maintenance is largely the same, but there are important differences in the maintenance guide again.
Manual for the Triumph Street Twin (2021)
The above maintenance schedule comes directly from the user’s manual for the Triumph Street Twin (2021), which is available on the Triumph website.