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2025 Triumph Trident 660 Overview
For 2025, Triumph offers the Trident 660 as a sport motorcycle with 660 cc on tap. The 2025 Triumph Trident 660 is built around a Four stroke, transverse three cylinder, DOHC, 4 valves per cylinder, 240° firing order engine, a compression ratio of 12:1. Out on the road, the Trident 660 delivers 94 hp @ 11250 rpm of peak power and 68 Nm @ 8250 rpm of torque. In everyday use, the 2025 Trident 660 tips the scales at 195 kg, carries a 14-litre fuel tank, offers a seat height of 810 mm and spans a 1402 mm wheelbase. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2025 Triumph Trident 660 spec sheet below.
2025 Triumph Trident 660 compared with other bikes in the Sport category
Measured against other bikes in the Sport category in our database (up to 2003 models, one entry per model), the 2025 Triumph Trident 660 comes out as follows.
- With 68 Nm, the Trident 660 has the joint 620th lowest torque of 1573 bikes in the Sport category, 10% below the category average of 75.8 Nm.
- Engine displacement of 660 cc is smaller than that of 1157 of the other 2002 bikes in the Sport category.
- Narrowing the field to the 333 models within five model years of it, the torque of 68 Nm is lower than that of 207 of the other 332.
Versus the 2021 model
Compared with the 2021 model, peak power climbed from 60 kW to 70 kW (+10 kW), peak torque rose from 64 Nm to 68 Nm (+4 Nm), wet weight went up from 189 kg to 195 kg (+6 kg) and seat height rose from 805 mm to 810 mm (+5 mm). Displacement is unchanged.
2025 Trident 660 - Pros & Cons
Strengths
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⚡
Strong power output: Peak output on the Trident 660 is 94 hp @ 11250 rpm and 68 Nm @ 8250 rpm of torque - strong numbers for what it is.
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🔧
Fuel injection: No choke, no jetting, no altitude compensation to think about - fuel injection just works across a wider range of conditions than carburetion.
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Strong front braking: The disc front brake bites hard and stays consistent - a solid foundation whether it's stock or upgraded with braided lines.
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ABS fitted: With ABS on board, hard braking on a damp or gravelly surface is far less likely to end in a locked wheel.
Considerations
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Chain final drive upkeep: A chain drivetrain is the most common setup in its class, but it's also the one that demands the most regular hands-on maintenance.
Wear Points & Servicing Notes
Cooling system servicing
With Liquid cooled, thermal management is largely automatic, but the coolant has a service life of its own - replace it on the manufacturer's interval to protect the water passages and thermostat.
Fuelling & injector care
Fuelling on the Trident 660 comes from Multipoint sequential electronic fuel injection with electronic throttle control. Cold starts and throttle response stay consistent across altitude and temperature, the main practical edge over a carbureted equivalent.
Brake disc and pad wear
2 x 310mm discs, 2-piston sliding calipers OCABS up front provides the primary stopping power; inspect disc thickness and pad wear at each tyre change to catch scoring before it becomes a rotor replacement.
Suspension condition on used examples
Suspension duties are handled by 41mm Showa upside down separate function forks up front and Showa monoshock RSU, with preload and rebound adjustment at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.
Final drive maintenance
Chain final drive on the Trident 660 means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.
Frame & chassis check
The Tubular steel perimeter frame, twin-sided, fabricated steel Swingarm chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.
Trident 660 - Buying & Maintenance Guide
What to check before buying
A pre-purchase check on the 2025 Triumph Trident 660 with its 660 cc sport should cover the same ground every time: service history, drivetrain condition, and any oil seepage around the casings. This model runs chain final drive, so check chain slack and sprocket tooth profile specifically - a worn sprocket is a cheaper fix now than after it's chewed up the next chain. Start it from cold if you can - a well-kept Trident 660 settles to a smooth idle within seconds.
Oil and filter changes
Oil changes are the cheapest insurance you can buy for the Trident 660's 660 cc four stroke, transverse three cylinder, dohc, 4 valves per cylinder, 240° firing order - keep to the manufacturer's interval rather than stretching it. With a 12:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Use the viscosity grade the manual specifies, not whatever's on sale.
Fuel system care
Injector systems like the Trident 660's hold up well with basic care - decent fuel, an occasional cleaner additive, and draining old fuel before any layup longer than three months.
2025 Triumph Trident 660 - Frequently Asked Questions
What engine does the 2025 Triumph Trident 660 have?
The 2025 Triumph Trident 660 uses a Four stroke, transverse three cylinder, DOHC, 4 valves per cylinder, 240° firing order engine with 660 cc of displacement. It is liquid cooled.
How much does the 2025 Triumph Trident 660 weigh?
The 2025 Triumph Trident 660 weighs 195 kg. This is the manufacturer's wet figure.
How much power does the 2025 Triumph Trident 660 make?
The 2025 Triumph Trident 660 produces 94 hp @ 11250 rpm of power and 68 Nm @ 8250 rpm of torque. These are peak figures.
What is the fuel tank capacity of the 2025 Triumph Trident 660?
The 2025 Triumph Trident 660 has a 14-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 233-280 km between stops.
Is the 2025 Triumph Trident 660 suitable for shorter riders?
The 2025 Triumph Trident 660 has a seat height of 810 mm. This is a moderate seat height that suits a wide range of rider heights.
What brakes does the 2025 Triumph Trident 660 have?
The 2025 Triumph Trident 660 uses 2 x 310mm discs, 2-piston sliding calipers OCABS at the front and single 255mm disc, single-piston sliding caliper OCABS at the rear.
What tyre sizes does the 2025 Triumph Trident 660 use?
The 2025 Triumph Trident 660 runs 120/70 - R17 front and 180/55 - R17 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
What gearbox does the 2025 Triumph Trident 660 have?
The 2025 Triumph Trident 660 is fitted with a 6 Speed Triumph Shift Assist transmission.
Triumph Trident 660 Spec Evolution
The Triumph Trident 660 was produced across 2 model years (2021-2025). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.
| Specification |
2021 |
2025 |
| Max Power |
80 hp / 60 kW @ 10250 rpm |
81 hp / 59.6 kW @ 10250 rpm |
| Wet Weight |
189 kg / 417 lbs |
195 kg / 430 lbs |
| Engine Detail |
Four stroke, transverse three cylinder, DOHC, 4 valves per cylinder |
Four stroke, transverse three cylinder, DOHC, 4 valves per cylinder |
| Seat Height |
805 mm / 31.7 in |
810 mm / 31.9 in |
| Brakes - Front |
2x 310mm discs Nissin 2-piston calipers |
2 x 310mm discs, 2-piston sliding calipers OCABS |
| Wheelbase |
1401 mm / 55.2 in |
1402 mm / 55.2 in |
| Brakes - Rear |
Single 255mm disc Nissin single-piston sliding caliper |
Single 255mm disc Nissin single-piston sliding caliper OCABS |
| Suspension - Rear |
Showa monoshock RSU, with preload adjustment |
Showa monoshock RSU, with preload adjustment |
Key Specifications
Engine
Four stroke, transverse three cylinder, DOHC, 4 valves per cylinder, 240° firing order
Power
94 hp / 70 kW @ 11250 rpm
Torque
68 Nm / 50.2 lb-ft @ 8250 rpm
Fuel Capacity
14 Litres / 3.7 US gal
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Full 2025 Triumph Trident 660 Specifications
Year
2025
Make Model
Triumph Trident 660
Seat Height
810 mm / 31.9 in
Wheelbase
1402 mm / 55.2 in
Height
1088 mm / 42.8 in (excl Mirrors)
Length
2024 mm / 79.75 in
Width
815 mm / 32.1 in (incl Handlebars)
Fuel Capacity
14 Litres / 3.7 US gal
Wet Weight
195 kg / 430 lbs
Displacement
660 cc / 40.2 cu-in
Engine Detail
Four stroke, transverse three cylinder, DOHC, 4 valves per cylinder, 240° firing order
Bore x Stroke
74.0 x 51.1mm
Compression Ratio
12:1
Cooling System
Liquid cooled
Emissions
Euro 5+
Exhaust
Stainless steel 3 into 1 header system with low single sided stainless steel silencer
Fuel Induction
Multipoint sequential electronic fuel injection with electronic throttle control
Starter
Electric
Clutch
Wet, multi-plate, slip and assist
Final Drive
X-ring chain
Transmission / Drive
6 Speed Triumph Shift Assist
Frame Type
Tubular steel perimeter frame, twin-sided, fabricated steel Swingarm
Suspension - Front
41mm Showa upside down separate function forks (SFF)
Suspension - Rear
Showa monoshock RSU, with preload and rebound adjustment
Rake
2456°
Trail
108 mm / 4.25 in
Wheel Travel - Front
120 mm / 4.7 in
Wheel Travel - Rear
130 mm / 5.1 in
Instrumentation
Multi-function instruments with colour TFT screen
Brakes - Front
2 x 310mm discs, 2-piston sliding calipers OCABS
Brakes - Rear
Single 255mm disc, single-piston sliding caliper OCABS
ABS
Standard
Rims - Front
3.5 x 17
Rims - Rear
5.5 x 17
Tyres - Front
120/70 - R17
Tyres - Rear
180/55 - R17
Wheels
5 Spoke cast aluminum
Specifications are compiled from manufacturer documentation and cross-referenced
technical sources, and corrected on an ongoing basis.
Spot an error? Let us know.
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