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Yamaha XJ 750E-II

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Make Model

Yamaha XJ 750E-II

Year

1983

Engine

Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder

Capacity

749 cc / 45.6 cu-in
Bore x Stroke 65 х 56.5 mm
Cooling System Air cooled
Lubrication Wet sump
Compression Ratio 9.8:1

Induction

HSC33 carburetors

Ignition 

Transistorized 
Starting Electric

Max Power

87 hp / 64.8 kW @ 9000 rpm

Max Torque

7.1 kgf-m / 51.3 lb-ft @ 7000 rpm
Clutch Wet multiplate

Transmission 

5 Speed
Final Drive Shaft
Primary Reduction Ratio 1.672
Secondary Reduction Ratio 3.984
Gear Ratio 1st 2.187 / 2nd 1.500 / 3rd 1.152 / 4th 0.933 / 5th 0.811
Frame Double cradle

Front Suspension

36mm Showa  forks adjustable air pressure anti-dive resistance
Front Wheel Travel 150 mm / 5.9 in

Rear Suspension

Dual dampers adjustable for spring preload rebound damping
Rear Wheel Travel 97.5 mm / 3.8 in

Front Brakes

2x 300mm disc 2 piston calipers

Rear Brakes

Single disc

Front Tyre

100/90-18

Rear Tyre

120/90-18
Rake 27°
Trail 114 mm / 4.4 in
Wheelbase 1480 mm / 58.2 in
Seat Height 785 mm / 31 in

Dry Weight

214 kg / 471.4 lbs
Wet Weight 241 kg / 531.3 lbs

Fuel Capacity 

22 Litres / 5.8 US gal
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In 1983, the XJ750E-II was updated.  It was built on a XJ900 frame, and the engine was updated with new technical developments.

The displacement is 749 cc with a bore x stroke of 65 x 56.5 mm, a stroke increase of 0.4 mm from the 1982 model.  The DOHC engine was completely redesigned and the exhaust and intake valves were increased by 1 mm. It is also equipped with the YICS system.

This XJ750 breathes better thanks to a larger air filter and exhaust system borrowed from the XJ900 and 33mm diameter carburetors. The compression ratio goes from 9.2 to 1 to 9.8 to 1. All these modifications lead to an increase of 10% of the maximum power, which leads Yamaha to use the transmission by shaft and universal joints of the XJ900 , better adapted to these performances.


The chassis of this XJ750 uses the same rear suspension with programmed damping and spring preload settings, as well as the same axially ventilated disc brakes. On the other hand, the fork differs slightly with a larger diameter of the tubes, but without anti-dive device or pneumatic assistance.

The biggest innovation visible from the outside on the XJ900 and XJ750 is the fairing, no longer mounted on the fork, but fixed directly to the frame, and completed by an engine spoiler. Freed from the weight of the fairing and the dashboard, no longer supporting the wind pressure, the steering gains in precision and stability while the new fork crown provides more effective protection for the rider.

The fuel tank was increased to 22 litres.