Triumph Sprint ST955i

Triumph Sprint ST955i
Manufacturer	Triumph
Production	2002
Engine	Four stroke, transverse three cylinder. DOHC, 4 valves per cylinder
Compression ratio	12.0:1
Top Speed	231 km/h / 143.5 mph
Ignition	Digital CDI
Spark Plug	NGK, CR9EK
Battery	12V, 12Ah
Transmission	6 Speed
Frame	Aluminum, twin spar
Suspension	Front: 45 mm Forks with dual rate springs and adjustable preload Rear: Monoshock with adjustable preload, compression and rebound damping
Brakes	Front: 2 x 320 mm Discs, 4 piston calipers Rear: Single 255 mm disc, 2 piston caliper
Front Tire	120/70 ZR17
Rear Tire	180/55 ZZR17
Wheelbase	1470 mm / 57.9 in
Seat Height	800 mm / 31.5 in
Weight	249 kg / 456 lbs (wet)
Fuel Capacity	19.5 Liters / 5.2 US gal / 4.3 Imp gal
Manuals	Service Manual

It could reach a top speed of 231 km/h / 143.5 mph.

Engine

The engine was a Liquid cooled cooled Four stroke, transverse three cylinder. DOHC, 4 valves per cylinder. The engine featured a 12.0:1 compression ratio.

Drive

Power was moderated via the Wet, multiple discs, cable operated.

Chassis

It came with a 120/70 ZR17 front tire and a 180/55 ZZR17 rear tire. Stopping was achieved via 2 x 320 mm Discs, 4 piston calipers in the front and a Single 255 mm disc, 2 piston caliper in the rear. The front suspension was a 45 mm Forks with dual rate springs and adjustable preload while the rear was equipped with a Monoshock with adjustable preload, compression and rebound damping. The Sprint ST955i was fitted with a 19.5 Liters / 5.2 US gal / 4.3 Imp gal fuel tank. The wheelbase was 1470 mm / 57.9 in long.

Photos

Overview

Triumph Sprint ST

First unveiled at the end of 1998, Triumph's Sprint ST is the Hinckley firm's interpretation of the modern sports-tourer bike. Long dominated by Honda's VFR800, this competitive sector of the market requires a machine with the comfort for easy 1200km (750-mile) days, as well as track-friendly performance on arrival. On paper, the Sprint ST fits the bill. Powered by Triumph's latest 955cc three-cylinder engine, the ST can hit 256km/h (160mph), while weighing less than the VFR, at just 207kg (4561b). Adjustable suspension and sporty tires add chassis sporting potential, and the sleek bodywork and single-sided swingarm supply classic good looks. Strong, sportsbike brakes give class-leading performance.

Already regarded as one of the most versatile motorcycles in the world the 2002 Sprint ST benefits from the same heavily-revised engine fitted to the latest Speed Triple and the Sprint RS. A machine as happy scratching through back lanes as it is hitting the continent on long hauls, the Sprint ST remains a firm favorite with riders who expect adaptability as a standard feature. The hugely capable twin spar aluminum chassis and single-sided swing-arm remain unchanged. Clever touches like the two-position exhaust, either fixed high for added cornering clearance, or lower down to allow room for fitted luggage remain a reason why this bike is a favorite with serious riders. Only the graphics are changed to enhance the flowing lines and deep-finish color scheme of the new machine. The engine changes offer even more of the long-legged performance the Sprint ST is renowned for. The new 120bhp powerplant is identical to the new 955cc three-cylinder engine fitted to the new Speed Triple and Sprint RS. Employing high-pressure die-cast crankcases for both strength and lightness, the DOHC 12-valve liquid-cooled engine’s new cylinder head utilizes 1mm larger inlet valves and 1mm smaller exhaust valves, set at a narrower included angle. Both inlet and exhaust ports are redesigned for better gas flow and the new cast pistons run in steel liners. Compression ratio is up from 11.2:1 to 12:1.while crankcase breathing is revised to minimize power loss. The new engine is 2.5kg lighter than before. A larger airbox feeds the new closed loop fuel injection system which features smaller, lighter injectors, while compact, light plug-top ignition coils provide dependable high-intensity sparks. The closed-loop system features an oxygen sensor that monitors and adjusts the air: fuel ratio at varying engine speeds to optimize engine performance. The fuel injection mapping is tuned for even more mid-range torque making the Sprint ST’s punchy three-cylinder performance even easier to use to the full. As on the Speed Triple engine, the alternator is now located on the left-hand end of the crankshaft and the starter motor drive is located on the right. This layout, reduces noise, especially at idle, as there’s now no need for a gear-train to drive the alternator. And a revised claw-type gear-change mechanism gives a much smoother and more positive shift action. The exhaust system has new headers and balance-pipe to further boost midrange output and for the German and Californian markets a secondary air injection system is fitted to minimize emissions. Cooling and lubrication systems are revised with the coolant radiator featuring a thinner core, increasing efficiency without adding size or weight. The Sprint ST is available in distinctive British Racing Green, cool Sapphire Blue and dashing Tornado Red. Source

Make Model	Triumph Sprint ST
Year	2002
Engine Type	Four stroke, transverse three cylinder. DOHC, 4 valves per cylinder
Displacement	955 cc / 58.3 cu in
Cooling System	Liquid cooled
Bore X Stroke	79 x 65 mm
Lubrication	Wet sump
Compression	12.0:1
Induction	Multipoint sequential electronic fuel injection
Engine Oil	Synthetic, 10W/40
Ignition	Digital CDI
Spark Plug	NGK, CR9EK
Starting	Electric
Battery	12V, 12Ah
Max Power	87.5 kW / 120 hp @ 9100 rpm
Max Torque	100 Nm / 10.2 kg-m / 74 ft-lb @ 5100 rpm
Clutch	Wet, multiple discs, cable operated
Transmission	6 Speed
Final Drive	Chain
Frame	Aluminum, twin spar
Front Suspension	45 mm Forks with dual rate springs and adjustable preload
Front Wheel Travel	127 mm / 5.0 in
Rear Suspension	Monoshock with adjustable preload, compression and rebound damping
Rear Wheel Travel	147 mm / 5.8 in
Front Brakes	2 x 320 mm Discs, 4 piston calipers
Rear Brakes	Single 255 mm disc, 2 piston caliper
Wheels Front	Alloy 3 spoke, 17 x 3.5 in
Wheels Rear	Alloy 3 spoke, 17 x 6.0 in
Front Tire	120/70 ZR17
Rear Tire	180/55 ZZR17
Rake	25.3º
Trail	94 mm / 3.7 in
Dimensions	Length 2160 mm / 85.0 in Width 735 mm / 28.9 in (handlebars) Height 1220 mm / 48.0 in
Wheelbase	1470 mm / 57.9 in
Seat Height	800 mm / 31.5 in
Wet Weight	249 kg / 456 lbs
Gvwr	453 kg / 999 lbs
Fuel Capacity	19.5 Liters / 5.2 US gal / 4.3 Imp gal
Fuel Reserve	1.1 Liters / 0.3 US gal / 0.2 Imp gal
Consumption Average	6.5 L/100 km / 15.3 km/l / 36 US mpg / 43.2 Imp mpg
Standing ¼ Mile	11.0 sec
Top Speed	231 km/h / 143.5 mph

External Links

• http://www.motorbikestoday.com/reviews/Articles/triumph_sprintst.htm