Triumph Street Triple S 660 (2020+) Maintenance Schedule

This is the maintenance schedule with associated service intervals for the Triumph Street Triple S (which people call the Street Triple S 660, to distinguish it from the former 765cc Street Triple S released in some markets), revamped from 2020 from the previous gen 2017-2019 Street Triple S.

The A2/LAMS-compliant 2020+ Triumph Street Triple S 660 has a restricted and reduced capacity 660cc engine. It makes a peak of 40 kW (52 hp) at 11250 rpm through the rev range, with peak torque of 60 Nm at 5250 rpm, giving it a lively ride. Peak power (still in restricted form) is about 10% higher than the earlier version. Many people who try it out think “I can’t believe this is learner-legal!”

The fun thing about the 2020+ Street Triple S is that it can be unlocked by a Triumph dealer for a nominal fee so you can re-register it as an unrestricted bike. Unrestricted, peak power jumps to a respectable 70 kW (94 hp) at the same rpm.

The maintenance schedule for the Street Triple S 660 very similar to those for other motorcycles with similar engines in the Triumph Street Triple Series, like the full spec Street Triple S 765.

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What you need to service the Triumph Street Triple S 660 (2020+)

Firstly, you need to see if you have the basic motorcycle maintenance tools — nothing shocking, just things like a paddock stand, oil filter wrench, and so on.

The following is a list of specific consumables for the Triumph Street Triple S 660 (2020+).

Part	Triumph Street Triple 660 (2020+) spec
Engine oil	The manual suggests semi or fully synthetic 10W/40 or 10W/50 motorcycle engine oil which meets specification API SH (or higher) and JASO MA, such as Castrol Power 1 4T 10W-50 (full synthetic).
Oil filter	Replace the oil filter every time you change the oil. Use Triumph part number T1218001. You can also use HifloFiltro part HF204RC.
Spark plugs	Use NGK spark plugs with code CR9EIA9. Make sure they’re gapped to 0.9 mm with an appropriate spark plug gap tool.
Air filter	Use Triumph part number T2200957 or K&N equivalent part TB-7617.
Brake fluid	Change your brake fluid every 2 years. Use Castrol DOT 4 for Triumph motorcycles.
Coolant	Change your coolant every 4 years. Triumph uses HD4X, a HOAT (Hybrid Organic Acid Technology) coolant with a 50% ethylene glycol mix. The “hybrid” part is that it contains silicates. You can use a silicate-enriched HOAT equivalent, like PEAK OET European Vehicles Blue. See our analysis of equivalents to Triumph HD4X
Brake pads	Front: Triumph part T2020377, or EBC part FA226HH (you need two sets) Rear: Triumph part T2024901, EBC part FA213HH (just need one set) EBC HH brake pads give better bite and feel and last longer, though over time they may wear your rotors more quickly than softer pads.
Chain	Maintain your chain with a Motul chain care kit.

Maintenance Schedule for Triumph Street Triple S 660

The following is the list of maintenance operations and to be done on the Street Triple S 660.

• Part of the below table includes checks you should do every day. Do those with the annual service too.
• For the 1K service, if you get to 6 months without having done 1K, do the service anyway.
• Camshaft timing — you only need to do this at the first 12K mi / 20K km service.
• [T] is for items that need Triumph specialist tools.

mi x 1000	0.6	6	12	18	24
km x 1000	1	10	20	30	40	Every
Lubrication
Engine oil – replace (Castrol Power 1 4T 10W-50)	•	•	•	•	•
Engine oil filter – replace (HF204RC)	•	•	•	•	•
Engine and oil cooler – check for leaks	•	•	•	•	•	Day
Fuel System and Engine Management
Fuel system – check for leaks, chafing etc.	•	•	•	•	•	Day
Throttle body plate (butterfly) – check/clean		•	•	•	•
[T] Autoscan – carry out a full Autoscan using the Triumph diagnostic tool (if you have one)	•	•	•	•	•	Year
[T] ABS modulator – check for stored DTCs	•	•	•	•	•	Year
Secondary air injection system – check/clean			•		•
Air cleaner – replace (TB-7617)			•		•
Throttle bodies – balance		•	•	•	•
Fuel hoses – replace						4 years
Evaporative loss hoses – replace						4 years
Ignition system
Spark plugs – check		•		•
Spark plugs – replace (NGK CR9EIA9)			•		•
Cooling system
Cooling system – check for leaks	•	•	•	•	•	Day
Coolant level – check/adjust	•	•	•	•	•	Day
Coolant – replace (Zerex G05)						3 years
Engine
Clutch cable – check/adjust	•	•	•	•	•	Day
Valve clearances – check/adjust			•		•
Camshaft timing – adjust			•			One time only*
Wheels and Tires
Wheels – inspect for damage	•	•	•	•	•	Day
Wheel bearings – check for wear/ smooth operation	•	•	•	•	•	Year
Tire wear/tire damage – check	•	•	•	•	•	Day
Tire pressures – check/adjust	•	•	•	•	•	Day
Electrical
Lights, instruments and electrical systems – check	•	•	•	•	•	Day
Steering and Suspension
Steering – check for free operation	•	•	•	•	•	Day
Forks – check for leaks/smooth operation	•	•	•	•	•	Day
Fork oil – replace					•
Steering head bearings – check/adjust		•	•	•	•
Steering head bearings – lubricate			•		•
Rear suspension linkage – check/lubricate			•		•
Brakes
Brake pads – check wear levels	•	•	•	•	•	Day
Brake master cylinders – check for fluid leaks	•	•	•	•	•	Day
Brake calipers – check for fluid leaks and seized pistons	•	•	•	•	•	Day
Brake fluid levels – check	•	•	•	•	•	Day
Brake fluid – replace (Castrol DOT 4)						2 years
Final Drive
Drive chain slack – check/adjust	•	•	•	•	•	Day
Drive chain – wear check						800 km (500 mi)
Drive chain – lubricate (Motul chain care kit)						300 km (200 mi)
Drive chain rubbing strip – check		•	•	•	•	Day
General
Fasteners – inspect visually for security	•	•	•	•	•	Day
Bank angle indicators – inspect visually for wear	•	•	•	•	•	Day
Side stand – check operation		•	•	•	•	Day

General information about the Triumph Street Triple S 660 (2020+)

The Triumph Street Triple has been a mainstay of Triumph’s line-up since launched over a decade earlier.

The core of the Street Triple has always been something like “a 600cc-class engine but in a sporty (and yet more upright) body, with tuning for more midrange torque rather than an uncompromising top-end focus”.

The Street Triple used to be the road-going companion to the Daytona 675 race bike, but since the Daytona is now a highly exclusive machine, the Street Triple (in its various incarnations) has taken over duty as both a road and track weapon.

The Street Triple S is the entry-level bike of the range that goes all the way up to the 765cc Street Triple RS, which is basically track-spec but with road-going gear.

In 2017, Triumph increased the displacement of their engines from 675cc to 765cc, but also released a 660cc version that’s restrict-able for certain markets where you have maximum power for learners. This is the Triumph Street Triple S 660.

To confuse things slightly, there were two versions of the Street Triple S released in 2017 — a 765cc version and the 660cc version. The 660cc version was restrictable to lower power output (35 kW / 47 hp) for compliance in Europe/Australia and a few other places.

As of 2020 there’s just the Street Triple S in 660cc configuration (so we don’t have to say Street Triple S 660 but we want to be absolutely clear).

The Triumph Street Triple S 660 is lower spec in a number of ways:

• Engine capacity: The 660 has a 660 cc engine, compared with the 765cc motor on the bigger R and RS bikes. It’s still a DOHC liquid-cooled triple.
• Front brakes — Nissin two-piston calipers, vs. the Brembo 4-piston calipers on the R and RS (in two different variations)
• Suspension — The front fork is a non-adjustable Showa shock, and the rear is a Showa shock adjustable for preload only. This contrasts with the fully-adjustable suspension on both the R and RS bikes.
• Instruments — the Street Triple S has an analogue + LCD display, compared to the TFT instruments on the R and RS

Despite this, the Triumph Street Triple 660 is a high-quality motorcycle. Jumping on board, you quickly forget that it’s a “learner” with its aggressive riding position, rev-happy engine, and ample torque down low. Needless to say, this is a bike that can get you into trouble.

The updated 2020 Triumph Street Triple S 660 has has new bodywork, twin LED headlights with LED DRLs, new mirrors, and new colors.

Manual for the Triumph Street Triple S 660

The above maintenance schedule comes directly from the user’s manual for the Triumph Street Triple S, which is available on the Triumph website.