THE YAMAHA GTS1000-Article From Dutch
GTS Web Page
This all-new machine represents a major leap forward in
motorcycle design for many reasons. Our radical Omega
chassis with its single-sided swinging arm front suspension
achieves excellent high-speed stability, and with its inherent
anti-dive properties offers remarkable all-round handling
performance even when carrying a passenger and luggage.
As you would expect from a Sports Tourer the GTS offers exceptionally high levels of rider and passenger comfort with its ergonomically designed seat/footrest/handlebar layout and full fairing with air management system.
Designed to produce massive low to mid-range torque for quick and easy overtaking and effortless touring, the 1002cc 5-valve motor perfectly completes the Omega chassis to make the machine one of the most enjoyable and relaxing bikes to ride in its class.
The GTS breaks new ground for Yamaha with its use of Electronic Fuel Injection (EFI) which ensures highly efficient
combustion processes an instantaneous throttle response, while a 3-way catalytic converter reduces exhaust emissions
for ii clearer environment.Available with ABS on the GTS1000A, the all-new Yamaha GTS1000 combines excellent roadholding and stability with high levels of rider comfort, and delivers massive torque exactly where a Sports Tourer needs it most. Fitted with Electronic Fuel injection and catalytic converter as standard equipment, this environmentally responsible
machine heralds beginning of an exciting new age for motorcycling.
GTS1000 DEVELOPMENT GOALS
When project '069' was launched our developments team's aim was to) produce a technologically superior Sports Tourer
that would offer high chassis and engine performance combined with excellent rider and passenger comfort. In short, our
goal was to build the most sophisticated road-going Yamaha motorcycle ever produced.
To achieve this out, team set about designing the completely new Omega chassis with its single-sided swinging arm front
suspension and hub link steering - a design offering previously unattainable levels of roadholding and high-speed stability.
Powering the GTS is a specially r-modified version of our highly acclaimed FZRI000 motor. To achieve dramatically
increased low to mid range torque our engineers have modified valve tinting and lift, and for smooth, stepless power
delivery the 1002cc S-valve motor is fitted with Electronic Fuel Injection (EFI) as well as a 3-way catalytic converter tot-
Once we had created the new Omega chassis and high-torque motor our next task was to create the most comfortable
seating position possible for both the rider and passenger. This has been achieved by developing a natural
seat/footrest/handlebar layout combined with the use of an aerodynamically efficient fairing with air management.
By using advanced chassis and engine technology combined with an ergonomically-designed riding position and low drag
fairing we hive not only met, but exceeded our target for rider and passenger comfort.
The result is a motorcycle that in every sense is ahead of its time!
YAMAHA GTS1000 TECHNICAL HIGHLIGHTS:
Omega Chassis Concept ensures high rigidity and low centre of gravity for excellent roadholding
and stability. Single-sided swinging arm front suspension gives excellent handling together with a high level of
comfort – and with its inherent anti-dive properties delivers remarkable suspension performance.
Easily accessible Final fully adjustable front shock absorber.
Excellent rider and passenger comfort.
Large diameter-ventilated front disc with 6-pot caliper - the first time this design liars been used
on a production motorcycle.
Monocross rear suspension.
OMEGA CHASSIS CONCEPT
The Omega chassis represents a revolutionary new way of
constructing motorcycles. Unlike anything previously
manufactured by Yamaha, this design uses a single.-sided
swinging arm front suspension instead of conventional
telescopic forks - and because. this new system separates
steering and suspension functions it has given our engineers
greater freedom in setting chassis dimensions.
Main frame beams are manufactured from multiple aluminum
castings welded together, risking for a very strong yet
extremely light structure with a low centre of gravity - while
detachable, down-tubes run between the beam ends under
the engine. Both the front and rear aluminum swinging arms are mounted directly to the main frame, while the front subframe
supports the steering head, radiator and fairing and the rear subframe supports the seat, rear bodywork and electrical
components. Front and rear shocks are also mounted directly onto the main frame, and die cast aluminum brackets bolted to the rear of the main structure support the passenger footrests and serve as mounting points for the rear subframe and muffler.
High levels of rigidity have been achieved by constructing the frame to be a very close fit around the motor, and for easy
maintenance tile rigid side of the frame can be unbolted.With no conventional steering head, fork tubes or triple clamps the omega chassis also allows greater freedom when mounting items such as the radiator, instruments and other front end components.
And the name Omega? This was chosen because when viewed from the left side, the GTS1000's chassis resembles the
Creek character Omega.
SINGLE-SIDED SWINGING ARM FRONT SUSPENSION
The GTS000's single-sided swinging arm front suspension
consists of an aluminum swinging arm mounted to the main
frame. A fully adjustable shock absorber is mounted
between the swinging arm and frame, arm steering inputs
are transmitted from the handlebar crown through a steering
box to a vertical cast aluminum spar (also called a knuckle
arm) to the front wheel. This vertical spar is also supported
by in upper arm mounted between the top of the spar and
the main frame.
Ball-joints located at the front of the, swinging arm just above and below the axle and just below the- steering box permit
the front wheel and vertical spar assembly to turn left and right. This design offers the rider many benefits. Because the
single shock is independent of the structure which supports and steers the front wheel, its function is less influenced by
the twisting and bending moments caused by braking and normal riding.
As a result this new front suspension system functions extremely well under a wide variety of road and load conditions to
give excellent roadholding characteristics. Another advantage of this system is that it gave our engineers a large. degree of
freedom in establishing chassis dimensions. Depending on the location of the pivot points for the upper and lower arms,
the length of the arms and the distance between the ball joints, the rate of change ill rake and trail and other important
factors could be changed to give the, most appropriate dimensions. Another feature of this design is that the trail and wheelbase have very small rates of change during suspension action - the wheel moves in an almost vertical plane, thereby maintaining virtually constant steering characteristics regardless of suspension action. In addition, because there is almost no rearward movement of the wheel when the suspension is compressed our- engineers have been free to locate the engine further forwards to achieve the desired front/rear weight balance.
Finally, with its inherent anti-dive characteristics the GTS1000's front suspension eliminates the pitching motion
experienced with conventional forks under braking to give a much smoother and more comfortable ride.
Fully adjustable for spring preload, compression and rebound damping, the single front shock absorber offers 116mm of
1002cc liquid-cooled 5 valve slant block DOHC
Genesis motor designed 1o produce massive low to
Electronic Fuel injection (EFI) for excellent efficiency
and reduced emissions.
Liquid-cooled oil cooler for extended motor life.
Curved radiator with large surface area for efficient
Chokeless operation due to EFI.
3-way catalytic converter.
Developed from our proven and highly successful FZR1000
engine, the heavily modified GTS1000 engine has been
specifically designed to produce significantly higher low to
mid range torque with a smooth, stepless power delivery that
is ideally suited to Sports Tourer usage.
This has been achieved in a number of ways, and in particular by
the use of Electronic Fuel Injection (EFI). Controlled by
an Electronic Control Unit (ECU) the GT51 000's injection system delivers precisely the correct amount of fuel to each
cylinder to suit the prevailing conditions.
So whatever the altitude or ambient temperature, the engine 'jetting' is always right over a wide range of conditions - an
especially important feature on a Sports Tourer. In addition to these advantages, EFI also increases fuel efficiency and
eliminates the need for a choke.
Low to mid range. performance has also been boosted by altering valve timing and lift, giving the GTS a strong spread of
smooth pulling power. Together with the advanced suspension system, highly efficient fairing and ergonomically-designed
riding position, this rider-friendly motor gives an incredibly smooth and relaxing ride.
ELECTRONIC FUEL INJECTION (EFI)
The C I-S] 000's Electronic Fuel injection system consists of 4 injectors
located in the machines inlet tracts, with each
injector operated by an Electronic Control Unit (ECU).
The ECU uses information gathered from sensors on and around the engine, including throttle sensor, intake air
temperature sensor in the airbox, air intake pressure sensor in the inlet tract, an rpm sensor, water temperature sensor,
cylinder identification sensor and oxygen feedback sensor.
At low engine loads the precise quantity of fuel to be injected is determined by the amount of vacuum in the inlet tract,
while. at high loads it is determined by the amount of throttle opening.
By independently monitoring each cylinder the exact amount of fuel is always injected which significantly improves throttle
response and fuel efficiency over ii wide range of operating conditions. So regard less of whether [lie GTS] 000 is being
ridden at sea level or high up in the mountains, in a very hot or very cold climate, the fuel mixture will always be accurate.
And because Electronic Fuel Injection eliminate the need for a choke, the GTS is quick and easy to start whether the
engine is hot or cold.
Fitted with a self diagnosis function, any potential problem on the new Electronic Fuel Injection system is easy to identify
and put right.
As well as being remarkably smooth, the new GTS1000 powerplant is also cleaner
than a conventional engine because it
is filled with a 3-way catalytic converter.
Used in conjunction with Electronic Fuel Injection this stainless steel honeycomb design catalyzer offers low flow
resistance and reduces HC by approximately 60%, CO by approximately 70%,, and NOx by approximately 60%.
BRAKES, WHEELS & TYRES
The GTS1000 represents many firsts for Yamaha, and with its-6-pot opposed piston caliper front brake it is the first
production motorcycle fitted with this system.
Operating a large, centrally-mounted .33Omm ventilated disc, this Flew caliper design ensures dependable braking, and is
backed up by all 282iiii-n ventilated rear with twin pot caliper.
New design 'I 7 inch cast alloy wheels are fitted with a 130/60/17 front tyre and 170/60/17 rear for excellent traction, and to
accommodate. the new single-sided swinging arm front suspension the front wheel axle. is considerably offset.
ANTI-LOCK BRAKING SYSTEM (ABS)
The ABS system used on the GTS1OOOA is very similar to that used oil the
FJ1200A, and its advanced design
incorporates an Flc-Electronic Control Unit (ECU) using dual microcomputers with a self-diagnosis function.
A Hydraulic Unit (HU) controls the flow of brake fluid by means of a flow control valve, pressure control solenoid valve,
buffer chamber, hydraulic pump and electric motor. The HU is controlled by the ECU which receives signals at 8
millisecond intervals from sensors at the front and rear wheels which it analyses using dual microcomputers. If the ECU
senses imminent wheel lock-up it will sign the HU to increase and decrease brake fluid pressure at up to 10 times per
second to prevent lock up at the relevant wheel
The rider becomes aware of the ABS operation by feeling the pulsating brake fluid pressure al the front brake and rear
brake levers. If the ABS system ever malfunctions a warning light is displayed on the instrument panel and the machine
reverts to normal non-ABS assisted braking,
Weighing only 2.8 kg, the HU for the GTS1000's ABS is located centrally in the chassis to maintain the low centre of
gravity achieved by this new machine.
Full fairing for efficient air management and excellent wind protection.
Natural riding position gives high levels of rider and passenger cornfort and reduces fatigue on
Anti-dive front suspension eliminates pitching under braking.
Proven Monocross rear suspension for stability and comfort.
Omega chassis ensures high speed stability.
Large, comfortable seat.
Storage spaces ill batik and body for personal items.
Car-style instrument panel for comprehensive information.
As described in the introduction, one of our main aims when developing this revolutionary new Sports Tourer was to offer
the highest possible levels of rider and passenger comfort.
This has been achieved by the use of an aerodynamically-efficient fairing, natural riding position and a luxurious scat,
together with the GTS1000's excellent new front suspension system and our proven Monocross rear end.
We've also provided useful storage compartments for personal belongings, and fitted the machine with out- most
comprehensive instrument panel ever.
As every rider who has ridden at high speeds knows, comfort
on a motorcycle is dramatically influenced by air velocity.
The fairing and bodywork on the GTS1OOO have been
designed to manage the airflow in such a way as to
minimize turbulence and maximize wind protection.
Available as standard with a choice of Sports or touring
screens, the GTS fairing deflects turbulence and creates a
relatively stable pocket of air around the rider and passenger.
This extremely efficient design achieves a remarkably low
coefficient of drag and also reduces wind and air noise
Built-in mirrors give extra weather protection for the rider's
hands, and the tyre-hugging rear fender keeps dirt and water
in its place.
One of the most critical features for any long distance machine is the riding position. In Keeping wills our aim of producing
an advanced Sport-tourer we paid close attention to creating a seat/footrest/handlebar relations for the rider and a
seat/footrest/rider relationship for the passenger that would ensure a natural riding position.
Neither too far forward nor too upright, the GTS1000's riding position ensures high levels of comfort.
Long, roomy, deeply padded and comfortable, the dual seat allows the rider and passenger to shift their
weight around and
find the most comfortable position.
One of the benefits of the Omega chassis design is that it frees up a great deal of space that would otherwise be
occupied on a conventional machine. For example, the fuel tank features a built-in storage compartment ideal for storing
gloves, maps or other small items, and further storage space is available ill the tail and tinder the
INSTRUMENTATION LIGHTING AND SECURITY
The GTS instrument panel is both elegant and functional,
and includes a speedometer with twin tripmeters,
tachometer, clock, fuel gauge and a full range of indicator
lights including one for water temperature. With its
automotive style layout, the instruments are easy to read,
and for high reliability and convenience both the speedometer
and tachometer are.
Electronically operated cable-free designs.
Headlights throw a broad beam to give excellent forward and
peripheral illumination, and for improved aerodynamics and
enhanced looks both the front and rear turning signals are
built ill to the fairing and rear light cluster respectively.
To deter thieves the, GTS is equipped with a specialty
hardened 7-leaf tumbler ignition switch which resists
attempts to penetrate it with drills and screwdrivers and
should any attempt be made to by-pass the switch a sensor
commands an automatic cut-out to immobilize the EFI.
MONOCROSS REAR SUSPENSION
Our proven Monocross suspension system is used at the
back end for smooth, accurate operation. Created by a
lightweight Deltabox swinging arm, the preload, compression
and rebound adjustable shock gives a full 13Omm rear wheel
travel for a comfortable ride even when fully loaded.
Another first on the GTS is our use of a new painting
process developed by Yamaha. Called Melange, this
patent-pending technique achieves an outstanding finish with
amazing depth and clarity, and with its semimetallic finish
this new system emphasises the high quality image of the
The GTS1000 has been designed as an advanced
sport-tourer and in line with this concept Yamaha has
developed pannier boxes as optional accessory items.
These panniers feature an all-new mounting system and
have been developed in close co-operation with Krauser.
They will be available exclusively as Genuine Yamaha
Accessories through the Yamaha dealer network. The
panniers will be available in two sizes with the larger version
capable of storing an integral helmet.
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