Triumph Street Triple S 660 (2017-2019) Maintenance Schedule

This is the maintenance schedule with associated service intervals for the Triumph Street Triple S 660 made from 2017-2019. It’s also known as the Street Triple 660.

The 2017 Triumph Street Triple S 660 is different to the 765cc version released in some markets.

The 660 is a reduced-capacity version that makes 70 kW (94 hp) in basic trim, but can be detuned to 35 kW (47 hp) for A2/LAMS-compliance for learners. Importantly, the factory can also apply a de-restrictor kit to bring it back up to full-power once you’ve cleared your license’s restrictions.

Here are all the Triumph Street Triple motorcycles, in case you’re looking for another one:

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.

From 2020, the Street Triple S 660 was upgraded to the a slightly different spec, with the majority (if not all) sales being for the A2/LAMS-compliant version.

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Triumph Street Triple S 660 Service Intervals

Overall, the Triumph Street Triple S 660 has 6000 mile / 10000 km service intervals. At every service, change the oil and filter, and look through the service checklist for other items to check.

Every 12000 miles / 20000 km, change the spark plugs, and check the valve clearances.

Regularly maintain the chain (keeping it clean, lubricated, and tensioned), particularly if you ride your Street Triple aggressively.

Finally, be sure to regularly replace your brake fluid and your engine coolant.

What you need to service the Triumph Street Triple S 660

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 series of motorcycles.

PartTriumph Street Triple 660 spec.
Engine oilThe 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 filterReplace the oil filter every time you change the oil. Use Triumph part number T1218001. You can also use HifloFiltro part HF204RC.
Spark plugsUse NGK spark plugs with code CR9EIA9. Make sure they’re gapped to 0.9mm with an appropriate spark plug gap tool.
Air filterUse Triumph part number T2200957 or K&N equivalent part TB-7617.
Brake fluidChange your brake fluid every 2 years. Use Castrol DOT 4 for Triumph motorcycles.
CoolantChange your coolant every 4 years. Triumph uses Hybrid Organic Acid Technology coolant with a 50% ethylene glycol mix. Zerex G05 is a HOAT coolant that meets this spec and that many Triumph owners use.
Brake padsFront: 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.
ChainMaintain your chain with a Motul chain care kit.
Consumables for Triumph Street Triple S 660

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 20K service.
  • [T] is for items that need Triumph specialist tools.
mi x 10000.66121824
km x 1000110203040Every
Engine oil – replace (Castrol Power 1 4T 10W-50)
Engine oil filter – replace (HF204RC)
Engine and oil cooler – check for leaksDay
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 DTCsYear
Secondary air injection system – check/clean
Air cleaner – replace (TB-7617)
Throttle bodies – balance
Fuel hoses – replace4 years
Evaporative loss hoses – replace4 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
Clutch cable – check/adjustDay
Valve clearances – check/adjust
Camshaft timing – adjust*
Wheels and Tires
Wheels – inspect for damageDay
Wheel bearings – check for wear/smooth operation Year
Tire wear/tire damage – check Day
Tire pressures – check/adjustDay
Lights, instruments and electrical systems – checkDay
Steering and Suspension
Steering – check for free operationDay
Forks – check for leaks/smooth operationDay
Fork oil – replace
Steering head bearings – check/adjust
Steering head bearings – lubricate
Rear suspension linkage – check/lubricate
Brake pads – check wear levelsDay
Brake master cylinders – check for fluid leaks Day
Brake calipers – check for fluid leaks and seized pistons Day
Brake fluid levels – checkDay
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
Fasteners – inspect visually for securityDay
Bank angle indicators – inspect visually for wear Day
Side stand – check operationDay
Triumph Street Triple S 660 Maintenance Schedule

General information about the Triumph Street Triple S 660 (2017-2019)

Street Triple 660 2017-2019 riding

The Triumph Street Triple has been a long-standing mainstay of Triumph’s line-up since launched over a decade earlier as the 675cc naked roadster based off the then Daytona 675.

The Street Triple is alongside the Speed Triple, which is a go-fast bike; the Street Triple is a “street”-able sportbike.

Which really is just nomenclature, as both bikes are both fast and street-able.

The Street Triple, with its smaller capacity engine, is more revvy, but not highly strung like a 600cc-class sportbike. It’s high-power, but not as high-power as sportbikes either. And it has low-down torque, but not as much as the Speed Triple.

So the Triumph Street Triple S is another incarnation of that same spirit that has imbued all Street Triples since launch in 2007 — comfortable, quick, and very high-quality.

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 and sometimes maximum engine capacity 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.

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

  • Engine capacity: The 660 has a 660 cc engine. 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 — Non-adjustable KYB suspension. The others all get a degree of adjustability.
  • 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.

Unlike many other restricted bikes (like the Honda CBR650R in Australia for example), it’s relatively easy to de-restrict the Street Triple 660 — Triumph can do it for you themselves.

The updated 2020 Triumph Street Triple S 660 has better suspension, an updated display, and more power from its engine.

Manual for the Triumph Street Triple S 660 (2017-2019)

Triumph Street Triple S 660 2017 2018 2019 maintenance schedule screenshot
Triumph Street Triple S 660 2017 2018 2019 maintenance schedule screenshot

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

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