XJ750RH

Basic color

New Yamaha Black or Brilliant Red

Dimensions:

Overall length

2,110 mm (83.1 in)

Overall width

860 mm (33.9 in)

Overall height

1,120 mm (44.1 in)

Seat height

775 mm (30.5 in)

Wheel base

1,445 mm (56.9 in)

Minimum ground clearance

140 mm (5.5 in)

Caster (steering head angle)

28°

Trail

114 mm (4.49 in)

Weight:

Net

218 kg (480 lb)

Engine:

Type

D.O.H.C. air-cooled, gasoline

Bore x stroke x cylinders

65.0 x 56.4 mm x 4 (2.559 x 2.220 in x 4)

Displacement

748 cc (45.64 cu.in)

Compression ratio

9.2 : 1

Lubrication:

Lubrication system

Pressure lubricated, wet sump

Delivery pump type

Trochoid

Carburetion:

Manufacture

HITACHI

Type

HSC32, constant velocity

Rated venturi size

25.3 mm (0.996 in)

Air filter:

Dry type element

Ignition:

Type

Battery ignition (Full transistor ignition)

Spark plug

BP7ES (NGK) or W22EP (ND)

Charging:

Type

Three-phase, regulated alternator

Manufacture, I.D. No.

HITACHI, LD119-08

Maximum output

14V 19A

Battery type

YB14L-A2

Battery dimensions

89 x 116 x 134 mm (3.50 x 6.54 x 5.28 in)

Regulator/Rectifier

S8534, I.C. type, full wave

Regulating voltage (No. load)

14.2-14.8V

Starting:

Electric starter

Primary drive:

Type

Spur gear

Teeth, ratio

97/58 1.672

Clutch:

Wet, multiple disc

Transmission:

Type

Constant mesh, 5-speed drum shifter

Teeth, ratio 1st

35/16 2.187

2nd

30/20 1.500

3rd

30/26 1.153

4th

28/30 0.933

5th

26/32 0.812

XJ750RH

Secondary type:

Type

Shaft drive

Transmission output:

Type, teeth, ratio

Spur gear, 49/36,1.361

Middle gear case:

Type, teeth, ratio

Bevel gear, 19/18, 1.055

Final gear case:

Type, teeth, ratio

Bevel gear, 32/11, 2.909

Chassis:

Frame

Tubular steel double cradle

Suspension: Front (type, travel)

Telescopic fork (Pneumo-mechanical)

150 mm (5.91 in)

Rear (type, travel)

Swing arm, 80 mm (3.15 in)

Tires: Front

3.25H19-4PR,Tubeless

Rear

120/90-18 65H,Tubeless

Brakes: Front

Dual hydraulic disc

Rear

Drum brake

Fuel tank: Total

19 lit (5.0 US. gal)

Reserve

4.1 lit (1.08US.gal)

Wheels: Front

MT1.85 x 19, Cast Aluminum

Rear

MT2.15 x 18, Cast Aluminum

Dimensions

Standard size

Wear limit

Intake

A

36.80 mm (1.449 in)

36.65 mm (1.443 in)

B

28.00 mm (1.102 in)

27.85 mm (1.096 in)

C

8.80 mm (0.346 in)

-

Exhaust

A

35.80 mm (1.449 in)

35.65 mm (1.404 in)

B

28.00 mm (1.102 in)

27.85 mm (1.096 in)

C

7.80 mm (0.307 in)

-

Inner Intake/Exhaust

Outer Intake/Exhaust

Free length

35.9 mm (1.413 in)

39.5 mm (1.555 in)

Spring rate

2.36 kg/mm (132.2 lb/in)

4.58 kg/mm (256.5 Ib/in)

Installed length (valve closed)

31.0 mm (t.220 in)

34.0 mm (1.339 in)

Installed pressure (valve closed)

9.0 kg (19.81b)

19.1 kg (42.1 lb)

Compressed length (valve open)

IN: 22.5 mm (0.886 in) EX: 23.5 mm (0.925 in)

IN: 25.5 mm (1.004 in) EX: 26.5 mm (1.043 in)

Wire diameter

2.8 mm (0.110 in)

3.9 mm (0.154 in)

Number of windings

7.75

6.0

Winding O.D.

20.6 (^+0.3 _-0) mm
(0.811in ^+0.012 _-0 ) in

29.4 (⁺⁰ _-0.3) mm
1.157  ⁽⁺⁰ _-0.012 ) in

Clearance (Cold engine)

0.11 ~0.15mm
 (0.004 ~ 0.006 in)

"A" head diameter

33 ±0.1 mm 
(1.2992 ±0.0039 in)

"B" face width

2.3 mm 
(0.0906 in)

"C" seat width

1.0 ±0.1 mm 
(0.0394 ± 0.0039 in)

"D" margin thickness (minimum)

1.2 ±0.2 mm 
(0.0472 ± 0.0079 in)

Stem diameter (O.D.)

 7^-0.010 _-0.025 mm

(0.2756 ^-0.0004 __0.0010 in)

Guide diameter (I.D.)

7^+0.012 _-0 mm

(0.2756 ^+0.0005 _-0 in)

Stem-to-guide clearance

0.010 ~ 0.037 mm 
(0.0004 ~ 0.0015 in)

Clearance (Cold engine)

0.16~0.20mm (0.006 ~0.008 in)

"A" head diameter

28 ±0.1 mm (1.2205 ±0.0039 in)

"B" face width

2.3 mm (0.0906 in)

"C" seat width

1.0 ±0.1 mm (0.0394 ± 0.0039 in)

7 ^-0.025 _-0.040 mm

(0.2756 ^-0.0010 __0.0016 in)

7^+0.012 _-0 mm

(0.2756 ^+0.0005 _-0 in)

Cylinder and piston:

Cylinder material

Aluminum alloy

Cylinder liner

Pressed in; special cast iron

Bore size: Standard

65.00 mm (2.5591 in)

Wear limit

65.10 mm (2.5630 in)

Cylinder taper limit

0.05 mm (0.0020 in)

Cylinder out-of-round limit

0.01 mm (0.0004 in)

Piston clearance: Standard

0.030 ~ 0.050 mm 
(0.0012 ~ 0.0020 in)

Maximum

0.1 mm (0.0039 in)

Piston ring:

Top

2nd

Oil

Design

Barrel

Taper

Expander

End gap (installed):

Standard

0.15 ~ 0.35 mm (0.0059 ~ 0.0318 in)

0.15 ~ 0.35 mm (0.0059 ~ 0.0138 in)

0.3 ~ 0.9 mm (0.0018 ~ 0.035 in)

Limit

1.0 mm (0.0394 in)

1.0 mm (0.0394 in)

1.5 mm (0.0591 in)

Side clearance:

Standard

0.03 ~ 0.07 in (0.0012 ~ 0.0028 in)

0.02 ~ 0.06 in (0.008 ~ 0.0024 in)

-

Limit

0.15 mm (0.0059 in)

0.15 mm (0.0059 in)

-

Crankshaft:

Crank journal/bearing oil clearance

0.004 ~ 0.064 mm (0.0016 ~ 0.0025 in)

Main journal run-out (maximum)

0.040 mm (0.0016 in)

Connecting rods:

Rod bearing oil clearance

0.03 ~ 0.09 mm (0.0012 ~ 0.0035 in)

Oil pump:

Housing-to-outer rotor clearance

0.09 - 0.15 mm (0.0035 ~ 0.0059 in)

Outer rotor-to-inner rotor clearance

0.03 ~ 0.09 mm (0.0012 - 0.0035 in)

Clutch:

Friction plate:

Thickness/q'ty

3.0mm(0.12in)/8

Minimum thickness

2.8 mm (0.11 in)

Clutch plate:

Thickness

1.6 mm (0.063 in)/7

Warp limit

0.05 mm (0.0020 in)

Clutch spring:

Length/q'ty

41.2 mm (1.622 in)/5

Minimum length

40.2 mm (1.583 in)

Spring rate

1.22 kg/mm (68.3 lb/in)

Clutch lever free play (at lever pivot point)

2~ 3 mm (0.08 ~ 0.12 in)

Transmission shaft run-out maximum:

0.08 mm (0.0031 in)

Middle gear case lash:

0.1 ~ 0.2 mm (0.0039 - 0.0079 in)

Manufacturer

HITACHI

Model I.D. No.

5G200

Main jet

#120

Pilot jet

#40

Starter jet

#40 (00.9)

Jet needle

Y-13

Fuel level

3±1 mm (0.118±0.039 in)

Pilot screw

Preset

Air jet. Main

#80

Air jet. Pilot

#225

Float valve seat

02.0

Engine idle speed

1,050 r/min

Wheels and tires:
Rim run-out: Vertical
Horizontal

2.0 mm (0.079 in) 
2.0 mm (0.079 in)

Tire pressure (cold)

Front

Rear

Up to 90 kg (198(b) load*

1.8 kg/cm² (26 psi)

2.0 kg/cm² (28 psi)

90 kg (198 lb) ~ 215 kg (474 lb) load* 
(Maximum load)

2.0 kg/cm² (28 psi)

2.3 kg/cm² (32 psi)

High speed riding

2.3 kg/cm² (32 psi)

2.5 kg/cm² (36 psi)

Minimum tire tread depth

0.8 mm (0.03 in)

0.8 mm (0.03 in)

Brakes:

Recommended fluid

DOT #3

Pad wear limit

4.0 mm (0.16 in)

Rear brake lining wear limit

2 mm (0.08 in)

Brake disc maximum deflection

0.15 mm (0.006 in)

Brake disc minimum thickness

4.5 mm (0.18 in)

Front brake free play 
(at lever pivot point)

1.0 ~ 2.0 mm (0.04 ~ 0.08 in)

Rear brake free play 
(end of pedal)

20 ~ 30 mm (0.8 ~1.2 in)

Front forks:

Travel

150 mm (5.91 in)

Spring free length

604.9 mm (23.81 in)

Spring preload length

582.9 mm (22.95 in)

Spring rate:

0~132mm(0~5.20in)

0.4 kg/mm (22.4 lb/in)

132 ~ 150 mm (5.20 ~ 5.91 in)

0.5 kg/mm (28.0 lb/in)

Fork oil capacity (each side)

309 cc (10.5 oz)

Oil type

Yamaha Fork Oil 20Wt or equivalent

Standard air pressure

0.4 kg/cm² (5.7 psi)

Rear shock absorbers:

Spring free length

227.8 mm (8.97 in)

Spring preload length

207.8 mm (8.18 in)

Spring rate:

0~55mm (0~ 2.17 in)

1.7 kg/mm (95.2 lb/in)

55 ~ 80 mm (2.17~3.15 in)

2.1 kg/mm (117.6 lb/in)

Travel

80 mm (3.15 in)

Spark plug:

NGK BP7ES or ND W22EP

Electrode gap

0.7 ~ 0.8 mm 
(0.023 ~ 0.032 in)

Spark plug cap resistance

5.0 kΩ (No. 1, No. 4), 
10 kΩ (No. 2, No. 3)

Pick up coil:

Resistance

65012 ± 20% at 20°C (68° F)

Ignition coil type: Spark gap

HITACHI CM 12-09

Primary resistance

2.5Ω ± 10%at20°C(68°F)

Secondary resistance

11 kΩ±20%at20°C(68°F)

Starter motor type:

ND, ADB4D2

Armature coil resistance

0.014Ω ± 6% at 20°C (68°F)

Brush length: Standard

12.0 mm (0.472 in)

Minimum

8.5 mm (0.33 in)

Brush spring pressure

800 ± 150g (28.24 ± 5.30 oz)

Armature mica undercut

0.6 mm (0.024 in)

Battery type:

YUASAYB14L-A2

Charging rate

1.4 Amps for 10 Hours

Generator type:

HITACHI LD119-08

Output

14V-19A at 5,000 r/min

Field (inner) coil resistance

4.0Ω±10%at20°C(68°F)

Stator (outer) coil resistance

0.46Ω ± 10% at 20° C (68° F)

Regulator type:

I.C. (S8534)

Regulated voltage

14.5 ± 0.3V

Allowable amperage

3A

Starter relay switch:

Cut-in voltage

Less than 8V

Headlight

12V, 60W/55W

Tail/brake light

12V, 8W (3CP)/27W (32CP)

Flasher light

12V,27W(32CP)x4

License light

12V, 8W(3CP)x2

Pilot lights:

Turn

12V, 3.4Wx2

High beam

12V,3.4Wx 1

Neutral

12V, 3.4Wx1

Warning

12V,3.4Wx1

Meter light

12V. 3.4Wx2

Auxiliary low beam light

12V,35Wx1

Part to be tightened

Part name

Thread size

Q'ty

Tightening torque

Remarks

m-kg

ft-lb

ENGINE:

Cylinder head

Nut

M10 P1.25

12

3.2

23.1

Apply oil.

Cylinder head cover

Bolt

M6 P1.0

20

1.0

7.2

Spark plug

-

4

2.0

14.5

Cylinder

Nut

M8 P1.25

2

2.0

14.5

Cam chain case 
Front & Rear

Cam shaft cap

Bolt

M6 P1.0

20

1.0

7.2

Tighten in 3 stages.

Cam sprocket

Bolt

M7 P1.0

4

2.0

14.5

Cam chain tensioner 
adjustment lock nut

Nut

M8 P1.25

1

0.9

6.5

Cam chain tensioner 
end plug

Bolt

M8 P1.25

1

1.5

10.8

Connecting rod

Nut

M7 P0.75

8

2.5

18.1

Generator (rotor)

Bolt

M10 P1.25

1

5.5

39.8

Drain plug

Bolt

M14 P1.5 
M8 P1.25

1 
1

4.3 
1.6

31.0 
11.6

Crankcase drain 
Middle gear case drain

Oil filter

Bolt

M20 P1.5

1

1.5

11.0

Pump cover

Screw

M6 P1.0

0.7

5.1

Strainer cover

Bolt

M6 P1.0

13

0.7

5.1

Crankcase

Flange
 bolt

M8 P1.25 
M6 P1.0

12 
27

2.4 
1.2

17.5 
8.7

Clutch boss

Nut

M20 P1.0

1

7.0

50.6

Clutch spring screw

Bolt

M6 P1.0

5

1.0

7.2

Change pedal

Bolt

M6 P1.0

1

0.8

5.8

Neutral switch

-

M10 P1.25

1

2.0

14.5

Exhaust pipe

Nut

M6 P1.0

8

0.75

5.4

Part to be tightened

Part name

Thread size

Q'ty

Tightening 
torque

Remarks

m-kg

ft-lb

SHAFT DRIVE:

Middle gear:

Drive shaft

Nut

M34 P1.5

1

11

80.0

Stake.

Mount cover

Screw

M8 P1.25

4

2.5

18.1

Stake.

Driven shaft

Nut

M14 P1.5

1

12

87.0

Use LOCTITE
Stake.

Bearing cap

Flange bolt

M8 P1.25

4

2.5

18.1

Final gear:

Drive shaft

Nut

M14 P1.5

1

11

80.0

Bearing housing

Flange bolt

M10 P1.25

2

2.3

16.6

Bearing housing

Nut

M8 P1.25

6

2.3

16.6

Oil mount screw

Plug

M14 P1.5

1

2.3

16.6

Oil drain screw

Plug

M14 P1.5

1

2.3

16.6

Bearing retainer

-

M65 P1.5

1

11

80.0

Left hand screw

CHASSIS:

Engine mounting bolt:

Front, upper

Nut

M10 P1.25

1

4.2

30.4

Front, under

Nut

M10 P1.25

2

4.2

30.4

Rear

Nut

M10 P1.25

2

7.0

50.6

Engine mounting stay:

Front

Nut

M8 P1.25

4

2.0

14.5

Handle crown & Steering shaft

Bolt 
Nut

M14 P1.25 
M8 P1.25

1 
1

5.4 
2.0

39.1 
14.5

Handle crown & Inner tube

Nut

M8 P1.25

1

2.0

14.5

Handle crown & Handle holder

Bolt

M8 P1.25

2

2.0

14.5

Front fork:

Under bracket & Inner tube

Bolt

M8 P1.25

4

2.0

14.5

Front wheel shaft

Nut castle

M14 P1.5

1

10.7

77.4

Front wheel axle pinch bolt

Nut salf locking

M8 P1.25

2

2.0

14.5

Pivot shaft

Bolt

M22 P1.5

1

0.55

4.0

Taper roller 
bearing

Rear wheel shaft

Nut castle

M14 P1.5

1

10.7

77.4

Rear shock absorber (Upper)

Nut cap

M10 P1.25

2

3.0

21.7

Rear shock absorber (Lower)

L Nut cap R Bolt

M10 P1.25

2

3.0

21.7

Footrest

Bolt

M10 P1.25

2

4.2

30.4

Tension bar & Brake plate

Bolt

M8 P1.25

1

2.0

14.5

Tension bar & Rear arm

Bolt

M8 P1.25

1

2.0

14.5

Camshaft lever & Camshaft

Bolt

M6 P1.0

1

0.9

6.5

Disc brake section:

Brake disc & Hub (Front)

Bolt

M8 P1.25

12

2.0

14.5

Lock washer

Master cylinder & 
Brake hose (Front)

Bolt union

M10 P1.25

1

2.0

14.5

Brake hose & Joint

Bolt union

M10 P1.25

1

2.6

18.8

Caliper & Brake hose

Bolt union

M10 P1.25

1

2.6

18.8

Caliper & Front fork (Front)

M10 P1.25

1

4.5

32.5

Caliper bleed screw (Front)

M8 PI.25

1

0.6

4.3

DEFINITION OF TERMS:

m-kg

= Meter-kilogram(s) (usually torque)

9

= Gram(s)

kg

= Kilogram(s) (1,000 grams)

lit

= Liter(s)

km/lit

= Kilometer(s) per liter (fuel consumption)

cc

= Cubic centimeter(s) (cm³) (volume or capacity)

kg/mm

= Kilogram(s) per milimeter (usually spring compression rate)

kg/cm²

= Kilogram(s) per square centimeter (pressure)