2004 Yamaha
XT660R
Yamaha's name has been synonymous with big
singles for nearly 30 years, and the all-new
XT660R is the very latest addition to the long
and distinguished line of XT adventure models.
Its 660cc liquid-cooled fuel-injected engine
is tuned to deliver high levels of mid-range
torque for rapid acceleration, and the state-of-the-art
dual rail chassis and longtravel suspension
give agile handling in a variety of conditions.
A newly designed front fender has a high level
front section and tyre-hugging rear section,
whilst the dual up-mufflers make for a clean
and stylish rear end - and to keep the rider
informed there is a comprehensive multi-function
LCD instrumentation panel. For detailed information
please refer to the full Yamaha XT660R press
release.
Yamaha's XT600 has established a strong and
loyal following amongst big single riders who
value and appreciate its remarkable all-round
versatility and legendary durability, as well
as its special character. Perhaps above all
though, it is the XT's reputation for being
a fun bike to ride in virtually any situation
that has made this gutsy motorcycle one of Yamaha's
most successful models.
Now, three decades on from the launch of the
original ground-breaking XT500, the legendary
XT brand is reborn in the shape of the exciting
new XT660R. Featuring a highly advanced fuel-injected
engine and sophisticated chassis, this all-new
machine runs with state-of-the-art technology
that offers today's rider higher levels of performance,
roadholding and comfort.
Yet, at the same time as being the most advanced
and sophisticated XT ever produced, the new
XT660R has also inherited the very heart and
soul of its legendary predecessors that have
made the XT such an important part of motorcycle
history. Its gutsy character, rugged good looks
and 'do anything' nature look sure to endear
this charismatic new motorcycle not only to
existing XT owners and other single cylinder
bikers, but also to a whole new generation of
riders who are searching for a genuine all-round
motorcycle possessing the genes of a thoroughbred
and backed up by a reputation forged over nearly
30 years that is second to none.
The letters 'XT' are amongst the most famous
and most respected in the world of motorcycling,
and they have been worn with pride by a succession
of highly successful Yamaha dual purpose models
spanning three decades. With X standing for
cross, and T standing for trail, the XT range
has opened up a new world of total freedom for
nearly 400,000 riders all over Europe for nearly
30 years, and the brand has come to epitomise
the essential spirit of fun, freedom and adventure
that attracts so many people to the world of
motorcycling.
When Yamaha launched the original XT500 in
1976, few people could have imagined how one
machine could have such an enormous effect on
the shape of motorcycling in the decades to
come.
As the first 4 stroke single ever produced
by Yamaha, the XT500 has a special place in
the history of the company. But perhaps even
more significant than its place in Yamaha's
corporate history books is the influence the
original XT500 had on the whole world of motorcycling.
In the late 1970s the vast majority of dual
purpose bikes were lightweight 2 strokes, and
so the arrival of a 4 stroke big single opened
up an exciting new world of possibilities.
With its mechanical strength, rugged chassis,
high levels of torque and greater fuel efficiency
than its 2 stroke counterparts, the XT500 in
1976 was soon recognised as being the ideal
machine for long distance rallying. It is widely
recognised that the XT played a major role in
making the dream of the very first Paris-Dakar
Rally come true for the late Thierry Sabine
in 1979. And the rest is history!
Since the first event, XT and XTZ-based machines
have won this gruelling rally a total of nine
times, making Yamaha the most successful manufacturer
in what is widely regarded as the world's toughest
motorsport event.
The original XT500 will go down in history
for many reasons. As well as being Yamaha's
first 4 stroke big single which played a pivotal
role in making the Paris-Dakar Rally a reality,
the XT500 was also one of Yamaha's longest running
production models which was still being manufactured
right up until 1989, 13 years after its introduction.
In 1982 Yamaha launched the XT550 which featured
an advanced new chassis equipped with a motocross-derived
Monoshock rear suspension, and this was followed
in 1983 by the XT600Z Ténéré whose large capacity
fuel tank was inspired by Yamaha's Paris-Dakar
winning factory machines. Introduced in the
late 1980s, the XT600 was quick to establish
itself as one of Yamaha's most popular middleweights,
and during the 1990s the model underwent a number
of technical and stylistic changes, culminating
in the XT600E that came to the end of its long
and successful production run in 2003.
New XT660R target market
With its new liquid-cooled engine, lightweight
chassis, high specification brakes and improved
levels of rider comfort, the new XT660R has
been designed to attract an even broader spectrum
of riders than its highly successful air-cooled
predecessor.
The new XT660R is clearly aimed at riders who
need a machine that can handle everything from
poorly surfaced rural roads and trails through
to urban streets and flowing open roads. With
a genuine on/off ability combined with strong
low and high speed performance and sharp looks
- and reinforced by the high esteem in which
the XT brand is held throughout Europe - the
new XT660R raises the stakes in this sector
of the marketplace.
The second customer group consists of predominantly
urban based riders who use their machine for
daily commuting as well as leisure riding out
of town. These riders will be attracted by the
higher levels of performance, agility and comfort
offered by the new XT660R, and although many
will never explore all the potential offered
by its dual purpose abilities, they will nevertheless
benefit from the easy handling, upright riding
position and high torque output that make the
new XT660R such a strong performer in urban
situations.
New 660 cc liquid-cooled engine
The new XT is powered by an all-new fuel-injected
single cylinder engine that has been designed
to deliver massive torque in the low- to mid-speed
range, making this a truly versatile machine
that excels in a very wide range of conditions.
Running with bore and stroke dimensions of 100
x 84 mm, the compact new powerplant is the most
advanced big single ever produced by Yamaha,
and in technological terms the XT660R engine
is a generation ahead of the air cooled design
featured on the XT600E. The priorities of the
design team were to produce a compact, efficient
and relatively lightweight engine that would
deliver massive low- to mid-speed torque across
a wide operating range, and would also comfortably
surpass EU-2 emissions regulations.
The new XT660R is equipped with a fuel injection
system which delivers increased performance
with exceptional throttle response, and this
efficient new system also plays an important
role in reducing emissions to levels well below
those set by EU-2 standards. For highly efficient
intake processes a long 82.1 mm injector featuring
twelve holes feeds the precisely controlled
fuel supply via a big bore 44 mm throttle body
into the newly designed cylinder head.
Complementing the XT's fuel injection system
is a newly designed cylinder head that offers
higher levels of intake and exhaust gas flow
efficiency. The new SOHC 4-valve head runs with
large diameter 38 mm intake valves and 32 mm
diameter exhaust valves, with both pairs of
valves angled at 20 degrees for optimal efficiency.
In addition to these performance enhancing
designs, the engine's friction-related power
losses are minimised by the use of roller bearings
in the rocker arms, making this new SOHC cylinder
head one of the lightest, most compact and most
efficient in the class.
Every effort has been made wherever possible
to reduce engine weight and increase efficiency,
and the new XT660R is fitted with an automatic
decompressor mechanism. Its design is similar
to that featured on Yamaha's YZ and WR competition
models, is therefore lightweight and it makes
for easy starting.
The new aluminium cylinder runs with a 100
mm bore and 84 mm stroke, and features a ceramic
composite plated bore that offers improved heat
dissipation and helps reduce weight. Running
in the low-friction plated cylinder is a lightweight
forged piston whose low reciprocating weight
makes for responsive pick up at all speeds.
The high efficiency 10:1 compression ratio
4-valve cylinder head discharges gases through
a free-breathing dual exhaust system manufactured
from stainless steel. Twin header pipes flow
into dual large capacity up-mufflers equipped
with catalysers which ensure that the new XT660R
meets EU-2 emissions regulations.
Combined with the new fuel injection system,
as well as the 4-valve cylinder head and lightweight
forged piston, this new exhaust system makes
Yamaha's new 660 cc engine the most powerful
and responsive big single ever used on a road-going
production Yamaha.
To ensure that this new big single runs as
cleanly as possible it is fitted with an air
induction system that introduces fresh air into
the exhaust system when any unburned gases are
detected. The introduction of air minimises
emissions to the lowest level ever seen on a
Yamaha single, allowing the new XT660R to fall
well within EU-2 standards.
Yamaha's engineers have fitted a relatively
light 130 mm diameter rotor, and its lower weight
makes for reduced inertial mass, which translates
into excellent throttle response over a wide
range of engine speeds.
Complementing the new higher powered fuel-injected
engine is a completely redesigned 5-speed transmission
that has been developed to offer smooth and
efficient operation in all riding conditions.
All gear wheels from second through to fifth
feature five gear wheel dogs (compared to three
on previous Yamaha models), whilst first gear
runs with four dogs. In addition to the uprated
gear wheels, three shift fork bars (instead
of two) are featured, whilst the shift cam segment
shape has been optimised, and finally the XT660R's
shift shaft runs on two bearings. As well as
ensuring slick shifting, these new features
also make this one of the strongest transmissions
ever featured on a Yamaha single.
Every effort has been made to reduce the weight
of components such as the piston, cylinder and
cylinder head. Our engineers have also succeeded
in minimising engine dimensions wherever possible,
and its compact crankcase design has given our
designers greater freedom in the construction
of a lightweight, agile handling chassis.
Engine technical highlights
- 660 cc liquid-cooled single cylinder 4 stroke
- New SOHC 4-valve cylinder head design
- Rocker arms equipped with roller bearings
- 10:1 compression ratio
- Forged piston and ceramic composite plated
cylinder
- Compact radiator with cooling fan
- High torque output across wide operating
range
- Fuel injection with big bore 44 mm throttle
body
- Dual exhaust ports
- Dual stainless steel up-mufflers with dual
catalysers
- Complies with EU-2 emissions regulations
- Compact overall dimensions for a 660 cc
engine
- Lightweight rotor
- Durable slick-shifting transmission
- Separate clutch cover for easy maintenance
- New lightweight high-rigidity chassis
- In the same way that the new liquid-cooled
fuel-injected engine represents a major leap
forward in the evolution of the XT series,
the high-specification chassis gives this
new generation all- rounder even greater potential
and wider appeal.
HIGH RIGIDITY FRAME
The new XT660R is equipped with a completely
redesigned chassis that has been designed
to offer exceptional rigidity which is particularly
beneficial in the higher speed ranges, thereby
expanding the versatility of this exciting
new big single.
INCREASED FUNCTIONALITY
Whereas previous XT models have featured
a single top frame tube, the new XT660R is
equipped with dual tank rails that greatly
increase overall chassis rigidity. This increased
strength allows the XT rider to make full
use of the higher power output of the new
liquid cooled engine, giving the new XT660R
an improved adventure touring function at
higher speeds.
EASY MANOEUVRABILITY
However, while the new dual tank rail frame
has been designed to offer higher levels of
rigidity, its weight and dimensions have been
kept to a minimum so that the XT660R retains
the agile handling and nimble low speed manoeuvrability
that has made the XT brand such a strong performer
in congested urban streets.
Overall chassis weight is kept low by using
the 660 cc engine as a stressed member, and
for smooth and light steering characteristics
the head pipe is equipped with taper roller
bearings.
INTEGRAL OIL TANK
The new frame incorporates an oil tank behind
the head pipe, and the tank's position at
the front of the machine in an area of high
air flow makes for excellent heat dissipation
to give consistently strong engine performance.
LONG TRAVEL 43 mm DIAMETER FRONT
FORKS
The XT660R's Paioli front forks are equipped
with large diameter 43 mm tubes that complement
the stiff chassis to give firm handling at
higher speeds together with easy manoeuvrability
and smooth suspension action in urban situations.
These high specification forks give 225 mm
of front wheel travel to ensure a comfortable
ride on the street, and the generous suspension
stroke combined with the flex-resistant 43
mm tubes underline the XT's genuine ability
to handle off road terrain.
MONOCROSS REAR SUSPENSION
The Monocross rear suspension system features
a compact single shock absorber operated by
a strong box section swingarm via a rising
rate linkage. This rugged set-up gives a full
200 mm of wheel travel, ensuring that XT660R
riders and passengers enjoy a comfortable
journey over a variety of road surfaces. This
proven system features a 5-step preload adjuster,
allowing quick and easy changes of suspension
settings to suit the conditions.
LARGE DIAMETER 298 mm FLOATING FRONT
DISC
As already mentioned, the new more powerful
engine and higher rigidity chassis expand
the performance horizons of the new generation
XT660R, and to match this increased potential
a new large diameter front disc brake is fitted.
The 298 mm floating front disc is slowed by
a Brembo 2-piston caliper equipped with different
diameter pistons of 30 mm and 32 mm, and this
high specification arrangement offers the
XT660R rider high levels of braking performance
together with accurate feel over a wide range
of riding speeds. Complementing the large
diameter front brake is a 245 mm rear disc
that is slowed by a single piston Brembo caliper,
which, like the front brake, offers a progressive
action together with plenty of feedback to
the rider.
15-LITRE FUEL TANK
The XT's slim, compact and stylish 15-litre
fuel tank gives a good operating range, and
its relatively short front/rear dimensions
allow the rider to adopt a natural, upright
seating position with their knees tucked close
in to the chassis.
LIGHTWEIGHT ALUMINIUM WHEEL RIMS
To ensure that unsprung weight is kept to
a minimum, the new XT660R runs with a 21 inch
front wheel and 17 inch rear wheel equipped
with aluminium rims. By keeping unsprung weight
low, the front and rear suspension action
is enhanced, giving a higher quality ride
both on and off road.
NEW STYLE FRONT FENDER AND FORK PROTECTOR
The new XT660R is the first Yamaha to be
equipped with a new front fender and fork
protector system which combines the rugged
image of a high level system with the practicality
of a conventional low level fender.
The front section of this system features
a high level dual-purpose style fender incorporating
lightweight fork protectors that help shield
the 43 mm tubes from road debris. Meanwhile,
the rear section of the fender immediately
behind the front forks is a low level design
that is mounted close to the 21 inch front
wheel, and this does an effective job in keeping
dirt and spray off the front of the engine.
Another advantage of this system is that it
helps to enhance engine running efficiency
by allowing unimpeded fresh air to flow straight
into the radiator and also past the in-frame
oil tank.
MULTI-REFLECTOR HEADLIGHT AND COMPACT
WINDSCREEN
The all-new multi-reflector headlight runs
with a powerful 60/55 W bulb for good night
time visibility, and a compact windscreen
helps deflect wind away from the rider's upper
body for improved comfort. To underline the
bike's fresh new looks the compact flashers
now feature clear lenses and orange coloured
bulbs.
INTEGRATED IMMOBILISER SYSTEM
To help protect the machine from theft there
is a new immobiliser system built into the
main ignition switch. Once the keys are removed
by the rider the immobiliser automatically
sets itself, making the XT660R virtually impossible
to start.
U-LOCK STORAGE SPACE
In addition to its electronic anti-theft
system, the XT660R also features a U-lock
storage space under the dual seat. When used
in association with the immobiliser, the U-lock
helps to deter potential thieves.
MULTI-FUNCTION INSTRUMENT PANEL
The high specification instrumentation on
the new XT is all new, and its sophisticated
multi-function displays and digital speedometer
reflect the greatly enhanced specification
of this new generation big single. At the
centre of the panel is the LCD speedometer,
and next to this are displayed a clock, tripmeter
1, and a multi-function display consisting
of a tripmeter 2, odometer and fuel tripmeter.
Warning lights display information on engine
temperature, engine status, turn signals,
fuel level, high beam and neutral, and there
is also an indicator light to confirm the
status of the XT's immobiliser system.
Chassis Technical Highlights
- Tubular steel diamond type frame
- Dual tank rails
- Taper roller steering head bearings
- 43 mm diameter Paioli front forks
- 225 mm front wheel travel
- 5-step preload adjustable Monocross rear
suspension
- 200 mm rear wheel travel
- Lightweight aluminium wheel rims, 21" front,
17" rear
- 298 mm floating front disc brake
- 2-piston Brembo front caliper
- 245 mm rear disc brake
- Single piston Brembo rear caliper
- 15-litre fuel tank with integral fuel pump
- New design front fender and fork protector
- Low level rear front fender
- Multi-reflector 60/55 W headlight
- Compact headlight cowl with windscreen
- Multi-function LCD digital speedometer
- Main switch with immobiliser
- U-lock storage space
COLOURS
Rebirth of the legend
Born nearly 30 years ago, the original XT
has had an enormous influence on the development
of motorcycling within Europe. Spanning the
70s, 80s, 90s and now running into the 21st
century, the XT brand has come to represent
everything that is best about motorcycling.
Rugged and reliable, fun and adventurous,
the XT means many things to many people.
Now, as the air-cooled model comes to the
end of its illustrious production run, Yamaha
introduce a new generation liquid cooled successor
that is ready to offer the XT experience to
a wide spectrum of riders who appreciate the
essential values of motorcycling. With its
more powerful liquid-cooled fuel-injected
engine, high rigidity chassis, state-of-the-art
suspension and high specification braking
systems, the new XT660R offers even greater
sports riding potential, and yet retains the
core values of the XT brand.
- Engine Type - Liquid-cooled, 4-stroke, SOHC,
4 valves
- Displacement - 659 cc
- Bore and Stroke - 100 x 84 mm
- Compression ratio - 10:1
- Max. Power - 35.3 kW (48 HP) @ 6000 rpm
- Max. Torque - 58.4 Nm (5.95 kg-m) @ 5250
rpm
- Lubrication - Dry sump
- Fuel supply Fuel injection, 44 mm throttle
body
- Clutch type - Wet, multiple disc
- Ignition - TCI
- Starting system - Electric
- Transmission - Constant mesh, 5 speed
- Final transmission - Chain
- Gear ratio - 1 2.500, 2 1.625, 3 1.150,
4 0.909, 5 0.769
- Primary reduction ratio - 2.083
- Secondary reduction ratio - 3.000
- Frame - Steel tubular diamond frame with
dual tank rails
- Front suspension - Telescopic fork, ø 43
mm
- Rear suspension - Monocross with linkage
- Front wheel travel - 225 mm
- Rear wheel travel - 200 mm
- Caster angle - 28
- Trail - 118 mm
- Front brake - Single floating disc, ø 298
mm
- Rear brake - Single disc, ø 245 mm
- Front tyre - 90/90-21M/C 54S
- Rear tyre - 130/80-17M/C 65S
- Rim size front - 21 x 1.85
- Rim size rear - 17 x MT2.75
- Overall length - 2240 mm
- Overall width - 850 mm
- Overall height - 1235 mm
- Seat height - 855 mm
- Wheelbase - 1500 mm
- Min. ground clearance - 200 mm
- Dry weight - 165 kg
- Fuel tank capacity - 15 litres (reserve
3.5 litres)
- Oil (tank) capacity - 2.9 litres
- XT660R New model Yamaha Black, Racing Blue
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