Eric's Triumph Speed Four

by Eric A. Hulteen

Edited Monday 10 October 2011.

Riding in the Sierra Nevada, California on Highway 88

riding in the Sierra Nevada, California, highway 88 September 4, 2005 -- rode 457 miles that day. I wrote a bit about it at Road Carvin'. Photo by Mike Curry.

Riding near Jackson, California

riding near Jackson, California June 18, 2005. Photo by Mike Curry.

My 2002 Triumph Speed Four Specifications

Engine
Type In-line 4-cylinder, liquid-cooled, DOHC, 4 valves per cylinder
Displacement / Capacity 599 cc (36.5 cu. in.)
Bore x Stroke 68 x 41.3 mm
Compression Ratio 12.5:1
Carburetion / Fuel System Multipoint sequential electronic fuel injection with forced-air induction
Ignition Digital--inductive type--via electronic engine management system
RPM Redline 14,300 rpm
Transmission
Primary Drive Gear
Final Drive X-ring chain (DID 525VM2 106 link endless)
Clutch wet, multi-plate
Transmission / Gearbox 6-speed, constant mesh
Chassis
Frame Aluminium beam perimeter
Swingarm Twin-sided, aluminium alloy
Front Wheel Alloy 3 spoke, 17 x 3.5 in
Rear Wheel Alloy 3 spoke, 17 x 5.5 in
Suspension/Front 43 mm forks with dual rate springs and adjustable pre-load, compression, and rebound damping
Suspension/Rear Monoshock with adjustable pre-load, compression, and rebound damping
Brakes/Front Twin 310 mm floating discs, 4-piston calipers
Brakes/Rear Single 220 mm disc, single-piston caliper
Tires/Front 120/70 ZR 17
Tires/Rear 180/55 ZR 17
Dimensions
Length 81.1 in. (2060 mm)
Width 26.2 in. (665 mm)
[some sites report 27.2 in. (690 mm)]
Height 43.7 in. (1110 mm)
[some sites report 45.3 in. (1150 mm)]
Seat Height 31.9 in. (810 mm)
Wheelbase 54.9 in. (1395 mm)
Rake (Caster Angle) 24.6 degrees
Trail 3.5 in. (89.1 mm)
Fuel Capacity 4.5 gal US (17 liters)
[some sites report 4.8 gal (18 liters)]
Oil Capacity (with oil filter change) 4 qt (3.8 liters)
Dry Weight 374.8 lb. (170 kg)
Performance
Power 98 hp (73.1 kw) at 11,750 rpm (excludes effect of forced air induction)
Torque 46.1 ft. lb. (62.5 Nm) at 10,500 rpm
[some sites report 50.2 ft. lb. (68 Nm)]
Other
Primary Reduction Ratio 82/44 (1.864)
Secondary Reduction / Final Drive Ratio 42/14 (3.000)
Gear Ratio - 1st Gear 38/13 (2.923)
Gear Ratio - 2nd Gear 33/16 (2.063)
Gear Ratio - 3rd Gear 31/19 (1.632)
Gear Ratio - 4th Gear 29/21 (1.381)
Gear Ratio - 5th Gear 28/23 (1.217)
Gear Ratio - 6th Gear 26/24 (1.083)
Color Roulette Green