2005 Triumph Thruxton 900 Specifications

Name: 2005 Triumph Thruxton 900
Brand: Triumph

Classic • Specs last verified 13 July 2026

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2005 Triumph Thruxton 900 Overview

For 2005, Triumph offers the Thruxton 900 as a classic motorcycle with 865 cc on tap. The 2005 Triumph Thruxton 900 is built around a Twin engine running DOHC valve actuation, a compression ratio of 9.2:1. Internally, bore and stroke are 90 x 68 mm. Out on the road, the Thruxton 900 delivers 72 of torque. In everyday use, the 2005 Thruxton 900 tips the scales at 205 kg, carries a 16.60-litre fuel tank, offers a seat height of 790 mm and spans a 1,490 mm wheelbase. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2005 Triumph Thruxton 900 spec sheet below.

2005 Triumph Thruxton 900 compared with other bikes in the Classic category

Measured against other bikes in the Classic category in our database (up to 909 models, one entry per model), the 2005 Triumph Thruxton 900 comes out as follows.

With 865 cc, the Thruxton 900 has the joint 137th largest engine displacement of 909 bikes in the Classic category, 68% above the category average of 516 cc.
Seat height of 790 mm is taller than that of 206 of the other 436 bikes in the Classic category.
Narrowing the field to the 77 models within five model years of it, the engine displacement of 865 cc is larger than that of 50 of the other 76.

Versus the 2004 model

The figures we track are unchanged from the 2004 model: displacement and seat height all match.

2005 Thruxton 900 - Pros & Cons

Strengths

Strong front braking: The single disc front brake bites hard and stays consistent - a solid foundation whether it's stock or upgraded with braided lines.

Considerations

Carburetor fuelling: Carburetion is more hands-on than fuel injection - plan on periodic jetting and cleaning as part of routine ownership.
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

Carburetor maintenance

Being carbureted, the Thruxton 900 is more sensitive to stale fuel and altitude changes than a fuel-injected bike - a carb clean and rejet restores crisp throttle response after any extended lay-up.

Valve clearance checks

Valve clearances on DOHC-equipped engines like the Thruxton 900's drift slowly with mileage rather than failing suddenly - sticking to the service interval keeps it a non-issue.

Brake disc and pad wear

Single disc with 2-piston calipers 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 forks with adjustable preload up front and Chromed spring 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 Thruxton 900 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.

Thruxton 900 - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 2005 Triumph Thruxton 900 with its 865 cc classic 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. Now 21 years old, this classic is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. Start it from cold if you can - a well-kept Thruxton 900 settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for the Thruxton 900's 865 cc twin - keep to the manufacturer's interval rather than stretching it. With a 9.2:1 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.

Carburetor upkeep

A Thruxton 900 that's sat unused is almost always a carb-cleaning job before it runs right again - float bowls and pilot jets first, since they clog before anything else.

Valve clearance service

There's no reliable seat-of-the-pants way to tell if a Thruxton 900's valve clearances are in spec - a light top-end tick is the only real warning sign, and by then some wear has already happened. Service records are the only proof.

2005 Triumph Thruxton 900 - Frequently Asked Questions

What engine does the 2005 Triumph Thruxton 900 have?

The 2005 Triumph Thruxton 900 uses a Twin engine with 865 cc of displacement.

How much does the 2005 Triumph Thruxton 900 weigh?

The 2005 Triumph Thruxton 900 weighs 205 kg. This is the manufacturer's dry figure.

How much torque does the 2005 Triumph Thruxton 900 produce?

The 2005 Triumph Thruxton 900 produces 72 of torque.

What is the fuel tank capacity of the 2005 Triumph Thruxton 900?

The 2005 Triumph Thruxton 900 has a 16.60-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 276-332 km between stops.

Is the 2005 Triumph Thruxton 900 suitable for shorter riders?

The 2005 Triumph Thruxton 900 has a seat height of 790 mm. This is a moderate seat height that suits a wide range of rider heights.

What brakes does the 2005 Triumph Thruxton 900 have?

The 2005 Triumph Thruxton 900 uses single disc with 2-piston calipers at the front and single disc with 2-piston calipers at the rear.

What tyre sizes does the 2005 Triumph Thruxton 900 use?

The 2005 Triumph Thruxton 900 runs 100/90-19 front and 130/80-17 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

Triumph Thruxton 900 Spec Evolution

The Triumph Thruxton 900 was produced across 3 model years (2004-2006). 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	2004	2005	2006
Engine Type	Twin, four-stroke	Twin	Twin
Fuel Capacity	16.00 litres / 4.23 gallons	16.60 litres / 4.39 gallons	16.00 litres / 4.23 gallons
Brakes - Front	Single disc	Single disc. 2-piston calipers	Single disc
Wheelbase	1,477 mm / 58.1 in.	1,490 mm / 58.7 in.	1,490 mm / 58.7 in.
Brakes - Rear	Single disc	Single disc. 2-piston calipers	Single disc
Suspension - Front	-	41mm forks with adjustable preload	41 mm forks with adjustable preload
Fuel System	Carburettor	Carburettor. Twin carburettors with throttle position sensor and electric carburettor heaters	Carburettor. Twin carburetors with throttle position sensor and electric carburetor heaters
Clutch	-	Wet, multi-plate	Wet. multi-plate

Key Specifications

Engine

Twin

Power

Not recorded

Torque

72.00

Top Speed

Not recorded

Weight

205 kg / 451.9 lbs

Fuel Capacity

16.60 litres / 4.39 gallons

Full 2005 Triumph Thruxton 900 Specifications

Colours Jet Black/Silver, Racing Yellow/Silver, Caspian Blue/Silver

Seat Height 790 mm / 31.1 in.

Wheelbase 1,490 mm / 58.7 in.

Height 1,095 mm / 43.1 in.

Length 2,150 mm / 84.6 in.

Width 695 mm / 27.4 in.

Dry Weight 205 kg / 451.9 lbs

Fuel Capacity 16.60 litres / 4.39 gallons

Max Torque 72.00

Power-to-Weight Ratio 0.3415 HP/kg

Bore x Stroke (in,) 3.5 x 2.7 inches

Bore x Stroke (mm) 90.0 x 68.0 mm

Displacement (cc) 865.00 cc

Displacement (ci) 52.78 cubic inches

Engine Type Twin

Fuel Control DOHC

Stroke 4

Fuel System Carburettor. Twin carburettors with throttle position sensor and electric carburettor heaters

Compression Ratio 9.2:1

Ignition Digital - inductive type

Clutch Wet, multi-plate

Final Drive Chain

Gearbox 5-speed

Frame Type Tubular steel cradle

Suspension - Front 41mm forks with adjustable preload

Suspension - Rear Chromed spring twin shocks with adjustable preload

Rake 27.0°

Brakes - Front Diameter (in.) 12.6 inches

Brakes - Front Diameter (mm) 320 mm

Brakes - Rear Diameter (in.) 10.0 inches

Brakes - Rear Diameter (mm) 255 mm

Brakes - Front Single disc. 2-piston calipers

Brakes - Rear Single disc. 2-piston calipers

Tyres - Front 100/90-19

Tyres - Rear 130/80-17

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.