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2020 Triumph Street Twin Overview
For 2020, Triumph offers the Street Twin as a naked bike motorcycle with 900 cc on tap. The 2020 Triumph Street Twin is built around a Four stroke, 270° Crank angle parallel twin, SOHC, 4 valves per cylinder engine, a compression ratio of 11.0:1. Out on the road, the Street Twin delivers 48 kW @ 7500 rpm of peak power and 80 Nm @ 3800 rpm of torque. In everyday use, the 2020 Street Twin tips the scales at 198 kg, carries a 12-litre fuel tank, offers a seat height of 760 mm and spans a 1415 mm wheelbase. That's roughly 10.5 kg lighter than the average naked bike motorcycle in our database. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2020 Triumph Street Twin spec sheet below.
2020 Street Twin - Pros & Cons
Strengths
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Strong power output: Peak output on the Street Twin is 48 kW @ 7500 rpm and 80 Nm @ 3800 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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Accessible seat height: At just 760 mm, flat-footing at a stop is easy for most riders - a genuine confidence builder for less experienced owners.
Considerations
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Modest fuel capacity: A 12-litre tank keeps things light but means budgeting for more frequent fuel stops on any longer ride.
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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 Street Twin comes from Multipoint sequential electronic fuel injection. Cold starts and throttle response stay consistent across altitude and temperature, the main practical edge over a carbureted equivalent.
Brake disc and pad wear
Single 310mm floating disc Brembo 4 piston fixed caliper 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 41 mm Kayaba fork, non-adjustable with cartridge damping up front and Kayaba twin shocks with adjustable preload 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 Street Twin means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.
Frame & chassis check
The Tubular steel cradle 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.
Street Twin - Buying & Maintenance Guide
What to check before buying
A pre-purchase check on the 2020 Triumph Street Twin should cover the same ground every time: service history, chain and sprocket condition, and any oil seepage around the casings. Start it from cold if you can - a well-kept Street Twin settles to a smooth idle within seconds.
Oil and filter changes
Oil changes are the cheapest insurance you can buy for a Street Twin's engine - keep to the manufacturer's interval rather than stretching it. Use the viscosity grade the manual specifies, not whatever's on sale.
Fuel system care
Injector systems like the Street Twin's hold up well with basic care - decent fuel, an occasional cleaner additive, and draining old fuel before any layup longer than three months.
2020 Triumph Street Twin - Frequently Asked Questions
What engine does the 2020 Triumph Street Twin have?
The 2020 Triumph Street Twin uses a Four stroke, 270° Crank angle parallel twin, SOHC, 4 valves per cylinder engine with 900 cc of displacement. It is liquid cooled.
How much does the 2020 Triumph Street Twin weigh?
The 2020 Triumph Street Twin weighs 198 kg. This is the manufacturer's dry figure.
How much power does the 2020 Triumph Street Twin make?
The 2020 Triumph Street Twin produces 48 kW @ 7500 rpm of power and 80 Nm @ 3800 rpm of torque. These are peak figures.
What is the fuel tank capacity of the 2020 Triumph Street Twin?
The 2020 Triumph Street Twin has a 12-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 200-240 km between stops.
Is the 2020 Triumph Street Twin suitable for shorter riders?
The 2020 Triumph Street Twin has a seat height of 760 mm. This is a comfortable, accessible height for most riders.
What brakes does the 2020 Triumph Street Twin have?
The 2020 Triumph Street Twin uses Single 310mm floating disc Brembo 4 piston fixed caliper at the front and Single 255mm disc, Nissin 2 piston floating caliper at the rear.
What tyre sizes does the 2020 Triumph Street Twin use?
The 2020 Triumph Street Twin runs 100/90-18 front and 150/70 R17 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
What gearbox does the 2020 Triumph Street Twin have?
The 2020 Triumph Street Twin is fitted with a 5-Speed transmission.
Triumph Street Twin Spec Evolution
The Triumph Street Twin was produced across 4 model years (2017-2021). 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 |
2017 |
2018 |
2020 |
2021 |
| Max Power |
40.5 kW / 55 hp @ 5900 rpm |
40.5 kW / 55 hp @ 5900 rpm |
48 kW / 64 hp @ 7500 rpm |
47.8 kW / 64.1 hp @ 7500 rpm |
| Dry Weight |
198 kg / 437 lbs |
198 kg / 437 lbs |
198 kg / 436.5 lbs |
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| Engine Detail |
Four stroke, 270° Crank angle parallel twin, SOHC, 8 valves |
Four stroke, 270° Crank angle parallel twin, SOHC, 8 valves |
Four stroke, 270° Crank angle parallel twin, SOHC, 4 valves per cylinder |
Four stroke, 270° Crank angle parallel twin, SOHC, 4 valves per cylinder |
| Seat Height |
750 mm / 29.5 in |
750 mm / 29.5 in |
760 mm / 29.9 in |
765 mm / 30.1 in |
| Fuel Capacity |
12 L / 3.2 US gal / 2.7 Imp gal |
12 L / 3.2 US gal / 2.7 Imp gal |
12 Litres / 3.2 US gal |
12 Litres / 3.2 US gal |
| Frame Type |
Tubular steel cradle, twin-sided tubular steel swing-arm |
Tubular steel cradle, twin-sided tubular steel swing-arm |
Tubular steel cradle |
Tubular steel cradle |
| Displacement |
900 cc / 54.9 cu in |
900 cc / 54.9 cu in |
900 cc / 54.9 cu-in |
900 cc / 54.9 cu-in |
| Brakes - Front |
Single 310mm disc, Nissin 2 piston floating caliper, ABS |
Single 310mm disc, Nissin 2 piston floating caliper, ABS |
Single 310mm floating disc Brembo 4 piston fixed caliper |
Single 310mm floating disc, Brembo 4 piston fixed axial caliper |
Key Specifications
Engine
Four stroke, 270° Crank angle parallel twin, SOHC, 4 valves per cylinder
Power
48 kW / 64 hp @ 7500 rpm
Torque
80 Nm / 59 lb-ft @ 3800 rpm
Top Speed
Not published by manufacturer
Weight
198 kg / 436.5 lbs
Fuel Capacity
12 Litres / 3.2 US gal
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Full 2020 Triumph Street Twin Specifications
Year
2019 - 20
Make Model
Triumph Street Twin
Seat Height
760 mm / 29.9 in
Wheelbase
1415 mm / 55.7 in
Height
1114 mm / 43.9 in
Length
2090 mm / 82.2 in
Width
785 mm / 30.9 in
Dry Weight
198 kg / 436.5 lbs
Fuel Capacity
12 Litres / 3.2 US gal
Displacement
900 cc / 54.9 cu-in
Engine Detail
Four stroke, 270° Crank angle parallel twin, SOHC, 4 valves per cylinder
Bore x Stroke
84.6 x 80 mm
Compression Ratio
11.0:1
Cooling System
Liquid cooled
Emissions
EURO 4
Exhaust
Brushed 2-into-2 exhaust system with twin brushed silencers
Fuel Induction
Multipoint sequential electronic fuel injection, ride by wire
Ignition
Digital
Lubrication
Wet sump
Starter
Electric
Clutch
Wet, multi-plate assist clutch
Final Drive
O ring Chain
Transmission / Drive
5-Speed
Frame Type
Tubular steel cradle
Suspension - Front
41 mm Kayaba fork, non-adjustable with cartridge damping
Suspension - Rear
Kayaba twin shocks with adjustable preload
Rake
25.1°
Swingarm
Twin-sided, tubular steel
Trail
102.4 mm / 4.03 in
Wheel Travel - Front
120 mm / 4.7 in
Wheel Travel - Rear
120 mm / 4.7 in
Brakes - Front
Single 310mm floating disc Brembo 4 piston fixed caliper
Brakes - Rear
Single 255mm disc, Nissin 2 piston floating caliper
ABS
Standard
Tyres - Front
100/90-18
Tyres - Rear
150/70 R17
Wheels - Front
Cast aluminium alloy multi-spoke, 2.75 x 18 in
Wheels - Rear
Cast aluminium alloy multi-spoke, 4.25 x 17 in
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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