Triumph T140E 750
Triumph T140E 750 | |
Manufacturer | |
---|---|
Production | 1980 |
Engine | Four stroke, parallel twin, OHV, 2 valves per cylinder |
Compression ratio | 8.6:1 |
Top Speed | 190 km/h / 118 mph |
Ignition | Battery / dual coil / dual points / Lucas |
Transmission | 5 Speed |
Frame | Tubular steel, double front downtubes, oil bearing large tube backbone |
Suspension | Front: Telescopic forks Rear: Swingarm, Girling shocks, 3-way spring preload adjustable |
Brakes | Front: Single 254 mm disc, 1 piston caliper Rear: Single 254 mm disc, 1 piston caliper |
Front Tire | 3.25-19 |
Rear Tire | 4.00-18 |
Wheelbase | 1422 mm / 56 in |
Seat Height | 813 mm / 32.0 in |
Weight | 200 kg / 441 lbs (dry), |
Fuel Capacity | 18.2 Liters / 4.8 US gal / 4.0 Imp gal |
Manuals | Service Manual |
It could reach a top speed of 190 km/h / 118 mph.
Engine[edit | edit source]
The engine was a Air cooled cooled Four stroke, parallel twin, OHV, 2 valves per cylinder. The engine featured a 8.6:1 compression ratio.
Drive[edit | edit source]
Power was moderated via the Wet, multiplate.
Chassis[edit | edit source]
It came with a 3.25-19 front tire and a 4.00-18 rear tire. Stopping was achieved via Single 254 mm disc, 1 piston caliper in the front and a Single 254 mm disc, 1 piston caliper in the rear. The front suspension was a Telescopic forks while the rear was equipped with a Swingarm, Girling shocks, 3-way spring preload adjustable. The T140E 750 was fitted with a 18.2 Liters / 4.8 US gal / 4.0 Imp gal fuel tank. The bike weighed just 200 kg / 441 lbs. The wheelbase was 1422 mm / 56 in long.
Photos[edit | edit source]
Overview[edit | edit source]
Triumph Bonneville 750 T140E Special Edition
When Edward Turner was pencilling
his design for the Triumph Speed Twin way back in the mid-1930s he could
scarcely have dreamed that the same basic design would be used to power a
superbike of the 1970s, the Triumph Bonneville 750. The fact that the Bonneville
lasted so long is a tribute to the men at Meriden who, when their factory
was threatened with closure during the early 1970s, engaged in a marathon
sit-in which saved the works, their jobs, and their beloved Bonneville for
another decade.
By 1978, however, the Bonneville
was something of an anachronism in the world of motor cycling. It had an
old-fashioned twin-cylinder, pushrod engine in a world dominated by
multi-cylinder machines from Japan. Astonishingly, the Bonneville was still
the best selling 750 in Britain during 1978 in spite of the fact that this
was one of the most competitive classes on the market. Much of
this success was due to the absolute simplicity of the Bonneville. Weighing
about 395lb it was about a hundredweight lighter than most of its Japanese
rivals and with a crankcase measuring about 14 inches across it was a good
eight inches narrower than the bulkier Japanese fours.
This light weight and slim build also meant that the bike's manoeuvrability and handling were far superior to most of its rivals, a fact that went down well with British riders confined to roads narrower, shorter and more crowded than those of their colonial cousins.
The powerhouse of the Bonneville is a straightforward piece of machinery. Two cylinders, each measuring 76 mm by 82 mm, give a total capacity of 744cc-the original Bonneville models, incidentally, were of 650cc but were uprated for more power and torquewhile the valves are operated by pushrods. Two Amal carburettors provide the fuel for the 8.6:1 compression ratio motor, giving a power output of 49 bhp at 6200 rpm, not a great deal by modern Japanese standards. Where the Bonneville scores over the Japanese multis, however, is that the engine offers usable torque even at the lowest revs. The only serious problem surrounding the Bonneville is the classic one common to most parallel twinsvibration. At high revs the bike vibrates quite severely, sending tingling sensations through the rider's arms and shoulders which at times may even become painful.
Another criticism levelled at the Bonneville is that its engine leaks oil. Models produced by the Meriden cooperative, however, are a far cry from those oldoil burners of the 1950s and the average owner has little to complain about in that respect.
Visually the Bonneville changed little over the years. It retained that lean and lithe look that is so typically British and which made it so popular over the years. The paint finish on the tank, much of it hand applied at the factory, is superb. Indeed, the bike is immaculately finished, living proof of the loving care and attention that went into the building of these machines.
The Bonneville may not have had the performance or sophistication of its multi-cylinder oriental rivals but it did have something that most of them lack, an almost human personality of its ownidiosyncratic, occasionally unreliable but always friendly.
Make Model | Triumph Bonneville 750 T140E Special Edition |
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Year | 1980 |
Engine Type | Four stroke, parallel twin, OHV, 2 valves per cylinder |
Displacement | 744 cc / 45.4 cu in |
Bore X Stroke | 76 x 82 mm |
Compression | 8.6:1 |
Cooling System | Air cooled |
Induction | 2 x 30 mm Amal carburetors |
Ignition | Battery / dual coil / dual points / Lucas |
Starting | Electric and kick |
Max Power | 40.3 kW / 54 hp @ 6200 rpm |
Max Torque | 56.6 Nm / 5.77 kgf-m / 41.8 ft-lb @5500 rpm |
Clutch | Wet, multiplate |
Transmission | 5 Speed |
Final Drive | Chain, 106 links |
Gear Ratios | 1st 12.25 / 2nd 8.63 / 3rd 6.58 / 4th 5.59 / 5th 4.70:1 |
Frame | Tubular steel, double front downtubes, oil bearing large tube backbone |
Front Suspension | Telescopic forks |
Rear Suspension | Swingarm, Girling shocks, 3-way spring preload adjustable |
Front Brakes | Single 254 mm disc, 1 piston caliper |
Rear Brakes | Single 254 mm disc, 1 piston caliper |
Front Tire | 3.25-19 |
Rear Tire | 4.00-18 |
Rake | 28o |
Trail | 109 mm / 4.3 in |
Wheelbase | 1422 mm / 56 in |
Dimensions | Length: 2220 mm / 87.5 in Width: 840 mm / 33.0 in |
Seat Height | 813 mm / 32.0 in |
Dry Weight | 200 kg / 441 lbs |
Fuel Capacity | 18.2 Liters / 4.8 US gal / 4.0 Imp gal |
Consumption | 5.5 L/100 km / 18 km/l / 42 US mpg / 51 Imp mpg |
Top Speed | 190 km/h / 118 mph |