This is the maintenance schedule with associated service intervals for the Triumph Street Twin motorcycle, launched in 2016 to replace the Triumph Bonneville EFI.
It’s very similar to those for other motorcycles with similar engines in the Triumph Modern Classics, notably the Triumph Street Cup.
The Street Twin is a sporty and simple roadster based on the Triumph 900cc liquid-cooled engine. It’s somewhat of a replacement for the Bonneville (base model), whereas the Bonneville T100 replaces the old T100.
The engines that once were 865cc and air/oil cooled became 900cc and liquid-cooled, as well as getting a small power bump (that increased with time). The “Street” series also tends to make its power higher up in the rev range.
The Street Twin could also be seen as the smaller sibling to the later-released Speed Twin, a 1200cc standard/sport bike.
In 2019, Triumph updated the Street Twin with a small power bump and a torque curve that’s a little higher in the rev range, but the maintenance schedule and manual stayed the same. (Note: The brake pad spec is different, see below.)
Finally, in 2021, Triumph updated the 900cc platform line, including the 2021+ Triumph Street Twin.
This post was originally published on 31 May 2020, but has since been significantly updated.
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Triumph Street Twin Service Intervals
In general, 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 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 (2016-2020)
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 10W-40.|
|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||For 2016-2018 the brake pads code is T2027535. The equivalent part number for EBC brakes is FA142HH.|
For 2019-2020 (Brembo caliper): Standard brake pads code is T2026565. 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 (2016-2020)
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 cable – check function and adjust as necessary|
|Tire wear/tire damage – check|
|Tire pressures – check/adjust|
|Wheels – inspect for damage|
|Wheels – check wheels for broken or damaged spokes and check spoke tightness|
|Steering – check for free operation|
|Front and rear suspension – check for damage, leaks, and smooth operation|
|Brake pads – check wear levels|
|Brake fluid levels – check|
|Drive chain slack – check/adjust|
|All lights, instruments and electrical systems – check/adjust|
|Fasteners – inspect visually for security|
|Bank angle indicators – check for wear|
|Side stand/Center stand – lubricate/check operation|
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.
- Some items marked * are not strictly required annually, but are trivial to perform
|Triumph Street Twin 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|
|* Cooling system – check coolant hoses for chafing/ cracks/ damage. Replace if necessary.|
|* Fuel system – check for leaks, chafing etc.|
|Wheel bearings – check for wear/smooth operation|
|Steering head bearings – check/adjust|
|Brake master cylinders – check for fluid leaks|
|Brake calipers – check for fluid leaks and seized pistons|
|Drive chain rubbing strips – check|
|Side stand pivot pin – clean/grease|
|[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|
|Throttle body plate (butterfly) – check/ clean||✓||✓||✓||✓|
|Air filter – replace (TB-9016)||✓||✓||✓||✓|
|Spark plugs – check||✓||✓|
|Spark plugs – replace (NGK LMAR8A-9)||✓||✓|
|Valve clearances – check||✓||✓|
|Fuel filter – replace||✓||✓|
|Fork oil – replace||✓|
|Steering head bearings – lubricate (use lithium soap-based grease)||✓||✓|
|Brake fluid – replace (Castrol DOT 4)||2 years|
|Coolant – replace (Triumph HD4X or an alternative)||3 years|
|Fuel hoses – replace||4 years|
|Evaporative loss hoses (if fitted) – replace||4 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
The Triumph Street Twin was a big refresh from the Bonneville of earlier years. Actually the Bonneville continued on to become the T100, and the Street Twin is the cooler, sportier stablemate.
The Triumph Street Twin is based on a new-for-the-model 900cc liquid-cooled motor from Triumph. In its original incarnation in 2017 and 2018, the Street Twin made 41 kW (55 hp). It got a bump in 2019, when the motor made 65 hp peak at peak, but higher in the rev range. The manual and maintenance schedule stayed the same.
Like the earlier Bonneville, the Street Twin is the low-spec, light-weight motorcycle that’s more “engaging” to ride (or “less relaxed”). It’s more revvy and lightweight compared to its T100 sibling.
The new Triumph Street Twin’s (and stablemates’) 900cc engine also got a 270-degree crankshaft. This was previously a feature of the Scrambler (and a couple of other Triumphs), and meant to more suit “torquey” engines.
Triumph had retained the 360-degree crankshaft for their Bonnevilles for what they considered to be a more classic British feeling and sound. But from 2016 onward, the 270-degree crankshaft became a mainstay of Triumph parallel twins, large and small.
Power in the liquid-cooled engine is made slightly higher in the rev range than on the air/oil-cooled motors. The wider service intervals of 10,000 miles (16,000 km) help reduce the Street Twin’s cost of ownership, too. And the fact that you don’t need to service valves until 20000 miles (32000 km) is even better. Wait until you get to the job — the SOHC design makes it even easier.
In 2021, Triumph refreshed the 900cc engine and issued a maintenance schedule for the new 2021+ Triumph Street Twin.
Manual for the Triumph Street Twin (2016-2020)
The above maintenance schedule comes directly from the user’s manual for the Triumph Street Twin (2016-2020), including the 2019 refresh, which is available on the Triumph website.