XJ750D supplement.pdf

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Yamaha XJ750D Fuel Injection (model 22N)
1982-85.
Due to the fact that this model was only produced for the Japanese home
market, manuals are almost impossible to find. In this directory you will find some
copies of an incomplete original Yamaha factory manual. It was of course
originally only printed in Japanese so we have translated what we were able to.
If you have access to a complete manual or are able to provide a translated copy
of a manual please contact us at
d_jack@xtra.co.nz
This bike is a little more unusual. It is one of the earliest examples of fuel
injection used on a motor cycle.
It is based on the same body style as used on the Yamaha XJ-650-Turbo.
It boasts a fully digital dash board with a ten function on-board fuel economy
computer that includes a clock, up-count trip meter, set-able down-count trip
meter, fuel remaining in tank (ltrs), fuel economy (as you ride, updated every 30
seconds) range on remaining fuel, time spent on trip, average speed, fuel
consumption, and average economy.
There is also a seven function monitor that activates a large warning light on the
dash and displays an LCD icon to warn if the side stand is down or brake, oil,
battery or fuel levels are low. It also warns of lamp failure in the head or tail lights
and provides a fuel gauge.
Originally these bikes were all silver with either red or gray decals depending on
year of manufacture.
When I purchased my injection the previous owner had repainted it blue with red
pearl, I liked the change so kept it. I am not really keen on the original silver paint
work.
The fuel injection is the electronic multi point type with the injectors housed in
four simple throttle body's with the usual cable actuation via a twist grip on the
right handle bar.
Intake air flow is monitored by an airflow sensor in the air box and a boost sensor
piped to one inlet manifold.
The fuel pump is an electric 'disk and roller' type pump. Normally these bikes use
a Hitachi pump but mine had failed and the closest equivalent I could find was a
Airtex EP6910 EFI pump. It seems to perform well.
The engine / gearbox and final drive are the same as used on the other early
1980's XJ 750's.
Specifications;
Model
Frame No.
Engine Model
Manufactured since
Overall Length
Overall width
Dimensions
Overall height
Seat height
Wheelbase
Minimum road clearance
Weight
Seating capacity
Climbing capacity
Performance
Minimum turning radius
Stop length
Type
Cylinder
Displacement
Bore x stroke
Compression ratio
Compression pressure
Engine
Horsepower
Torque
Air cleaner
Clutch type
Gear box type
Starting System
Ignition System
Chassis
Frame type
Steering: Caster
Trail
Angle
Fuel tank capacity
Braking system: Front
Rear
Suspension: Front
Rear
Dry
With oil and full fuel tank
YAMAHA XJ750D
5G8-021058
5G8
Aug.1982
2170 mm
730 mm
1365 mm
785 mm
1440 mm
140 mm
231 kg
254 kg
2
30¡
2700 mm
15 m (50km/h)
4 stroke, gasoline, air-cooled,
DOHC
4-cylinder, inline type
748cm^3 (45.6 cu.in)
65.0 mm x 56.4 mm
9.2
9.0kg/cm^2 - 300rpm
70PS/9000r.p.m.
6.2kg-m/7000r.p.m.
Dry type
Wet, multiple-disk
Constant mesh, 5-speed forward
Electric starter
Battery ignition (Full transistor
ignition)
Double cradle
28¡
115 mm
Each 35¡
19 L
Double disk brake/Right hand
operation
Drum brake/Left foot operation
Telescopic fork with anti-dive
Swing arm
Shock absorber: Front
Rear
Tire size: Front
Rear
Primary reduction ratio
Coil/air spring, oil damper
Air/gas/coil spring, oil damper
3.25H19-4PR (100/90R19 57H)
Tubeless tire
120/90-18 65 Tubeless tire
97/58 (1.672)
First 35/16 2.187
Second 30/20 1.500
Third 30/26 1.153
Fourth 28/30 0.933
Fifth 26/32 0.812
48/37 x 19/18 x 32/11
(1.297 x 1.055 x 2.909)
2200 cm^3
2500 cm^3
3200 cm^3
Injector
Ball type, 1 for each cylinder
0.55 mm
1050 r.p.m.
>185 mmHg
Front 1.75kg/cm^2
Rear 2.00kg/cm^2
Front 2.00kg/cm^2
Rear 2.25kg/cm^2
Front 2.00kg/cm^2
Rear 2.25kg/cm^2
SYB-14L-A2
12V, 14Ah
1.4 A x 10 hour
LD119-19
Hitachi, Ltd.
12 V
14V-26A
S8534
Nippon Denso, Ltd.
14.5 V
ADB4D2
Nippon Denso, Ltd.
12 V
0.6 KW
CM12-09
Hitachi, Ltd.
Gear
Ratio
Secondary reduction ratio
Periodic oil change
Engine oil quantity
With oil filter replacement
Total amount
Type
Nozzle
Fuel injection system
Injector diameter
Idling
Idling boost pressure
1 passenger
Tire air pressure
2 passengers
High speed
Type
Battery
Capacity
Regular charge
Type
Generator
Manufacturer
Voltage
Output
Type
Regulator
Manufacturer
Regulation voltage
Type
Starter
Manufacturer
Voltage
Output
Ignition coil
Type
Manufacturer
Spark plug
Headlight
Tail/brake light
Marker light
License light
Flasher light
Electrical
Meter light (Tachometer)
Meter light (Speedometer)
Pilot lights: NEUTRAL
HIGH BEAM
SPEED ALARM
TURN
ALARM INDICATOR
NGK BPR7ES,BP7ES
Nippon Denso W22PR,W22EP
12V,60/55W (Halogen Bulb,
Quartz)
12V,27/8W x 2
12V,3.4W
12V,3.4W x 2
12V,27W x 4
12V,3.4W
12V,2W x 5
12V,3.4W
12V,3.4W
12V,3.4W
12V,3.4W x 2
12V,3.4W

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