These are the known mechanical and performance specifications for your 2003 Triumph Speed Four.
ModelTriumph Speed Four
Displacement599.00 ccm (36.55 cubic inches)
DetailsIn-line four, four-stroke
Bore/Stroke68.0 x 41.3 mm (2.7 x 1.6 inches)
Horespower98.00 HP (71.5 kW)
Torque68.00 Nm (6.9 kgf-m or 50.2 ft.lbs)
Fuel Economy & Polution
Fuel Capacity18.00 litres (4.76 gallons)
Seat Height810 mm (31.9 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,150 mm (45.3 inches)
Total Length2,060 mm (81.1 inches)
Total Width690 mm (27.2 inches)
Wheelbase1,395 mm (54.9 inches)
Dry Weight170.0 kg (374.8 pounds)
Wheels & Brakes
Front BrakesDouble disc
Front Brake Diameter310 mm (12.2 inches)
Rear BrakesSingle disc
Rear Brake Diameter220 mm (8.7 inches)
It appears you're interested in specifications for the Triumph Speed Four. This Naked bike model is powered by a In-line four, four-stroke engine with 599.00 ccm (36.55 cubic inches) of actual displacement before 12.5:1 compression. Fueling is metered via Injection allowing this machine to produce its 98.00 HP (71.5 kW) horsepower and 68.00 Nm (6.9 kgf-m or 50.2 ft.lbs) torque. According to our records engine heat of the Triumph Speed Four is moderated by Liquid. You'll need to get familiar with the 6-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 120/70-ZR17 and the rear is 180/55-ZR17 . The entire package is supported by the frame, . We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Double disc front brakes and Single disc rear brakes. The Triumph Speed Four was launched in 2003, and we're happy to know (or assume) you've got one in your garage. To help you keep your ride in tip-top shape, consider purchasing an owner or service manual.