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Yamaha F J1100
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Make Model |
Yamaha FJ 1100 |
|
Year |
1984 |
|
Engine |
Air/oil cooled,
four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
|
Capacity |
1097 |
|
Bore x Stroke |
74 x 63.8 mm |
|
Compression Ratio |
9.5:1 |
|
Induction |
4x Mikuni BS36 carbs. |
|
Ignition /
Starting |
T.C.I / electric |
|
Max Power |
125 hp 91.1 kW @ 9000 rpm |
|
Max Torque |
86 Nm @ 8000 rpm |
|
Transmission /
Drive |
5 Speed / chain |
|
Front Suspension |
41mm Stanchion tube, 3-way position
adjustable preload damping,3-way adjustable spring preload. Hydraulic
anti-dive 126mm |
|
Rear Suspension |
Single shock 17-way adjustable rebound
damping 12-way spring preload 120mm range |
|
Front Brakes |
2x 282mm discs 1 piston calipers |
|
Rear Brakes |
Single 282mm disc 1 piston caliper |
|
Front Tyre |
120/80 V16 |
|
Rear Tyre |
150/80 V16 |
|
Dry-Weight |
227 kg |
|
Fuel Capacity |
24.5 Litres |
|
Consumption average |
34 mpg 14km/lit |
|
Braking 60 - 0 / 100 - 0 |
- / 36.9 m |
|
Standing
¼ Mile |
10.7 sec / 125.3 mp/h 200 km/h |
|
Top Speed |
146 mph / 235 km/h |
|
Manuals |
Clutch Modification |
The FJ1100 was the first
litre-plus motorcycle to address the problem of all litre-plus motorcycles -
how to make something fundamentally big and heavy handle responsively. The
FJ is a genuine 150mph superbike, combining a huge and immensely strong
engine with a low and fairly lightweight chassis. Until the FJ1200, it was
Yamaha's flagship, their biggest and most powerful four-stroke motorcycle.
The motor is a compact, slightly
inclined, DOHC, 16 valve transverse four, remarkable only for the amount of
sheer, outright power it gives - 125bhp at 9,000rpm -which makes the FJ a
king of wheelspin along its rapid path to a blistering top speed. What is
unusual about the bike is the way the engine is mounted. Yamaha realized
that serious weight-saving on a bike this big was a futile exercise, so they
concentrated their efforts on keeping the weight, and indeed the bike, low
and compact. Their 'lateral frame concept' consists of a high-tensile,
box-section steel frame built along endurance racer lines. There are no top
tubes running above the engine. Instead, two huge frame tubes laterally hug
the motor's sides. Instead of meeting at the steering head, these two side
tubes join in front of it; the steering pivot itself is supported by
small-diameter tubing, fully triangulated off these main rails. The aim is
to achieve the greatest possible steering head rigidity. Certainly it was a
first for a Japanese production bike.
Sitting on 16in wheels, front and
back, the FJ1100 feels remarkably low on the road. The seat height is a mere
30.7in yet there is good ground clearance. With a full tank it weighs 5561b
yet the weight is hardly noticeable on the move. The bike's low and tight
dimensions belie its size and it has none of the dead, top heavy feel of
traditional 1100cc monster road bikes. It steers quickly and nimbly as
intended. On small wheels with fat tyres, 4.4in of trail, a 30 degree head
angle and a trim 58.3in wheelbase, the FJ was the first 1100 to prove as
lively as many a middleweight motorcycle.
It makes smooth and strong power
effortlessly.
The wind-tunnel designed full
fairing deflects the worst of the wind and the weather and helps the bike to
an impressive top speed. It is so quick and powerful that it can easily
deceive the rider about what speed he or she is doing.
Early in 1986, Yamaha unveiled
the FJ1200, an oversized big bore version with more power everywhere
especially in the midrange. It is only a few mph faster at the top end. The
chassis spec is virtually identical and only detail changes have been made.
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