Yamaha XS750 User manual

SPEC

CAT IONS

A. GENERAL SPECIFICATIONS

Basic color

Dimensions:

Overall length

Overa

I width

Overall height

Seat

height

Wheelbase

Minimum ground clearance

Caster

(steering head angle)

TraiI

Weight:

Net

Engine:

Type

Bore x stroke x cylinders

Displacement

Compressionratio

Compression pressure (warm engine)

Lubr

cation

Lubrication system

Delivery pump type

Carburetion:

Manufacture

Type, I.D. No., Quantity

Rated venturi

size

Air filter

Ignition:

Type

Spark plug

Charging

Type

Manufacture, I.D. No.

Maximum output

Battery type

Battery dimensions

Regulator

Rectifier

Starting

Primary drive

Type

Teeth, ratio

Clutch

Crystal Silver

2180mm (85.8 in.)

835mm (32.9 in.)

1150mm (45.3 in.)

810mm (31.9 in.)

1465mm (57.7 in.)

145mm (5.7 in.)

27°

110mm (4.3 in.)

229 kg (505 Ibs.)

________~~

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

68mm x 68.6mm x3

747cc

8.5:1

142 Ibs in!(±14 Ibs in!)

Pressure lubricated, wet sump

Trocoid

Mikuni

BS34, constant velocity, 1J701, 3 pcs.

34mm

Dry foam rubber

Battery/coi

NGK BP-7ES, ChampionN

Three

phase, regulated alternator

Hitachi LD120-02

14.5 Vo lt/l8 amp

12 volt 14 amp

hour

134 x 166 x 89mm

Hitachi TL1Z-80

Stanley DE

4404, Silicon, full wave

Transmission coupled kick

Mitsuba Electric SM

224C

Hy-Vo silent chain

45/27 1.666

Wet,

multiple disc.

Transmission:

Teeth, ratio, overall 1st

2nd

3rd

4th

5th

Secondary Drive:

Transmission

utput

Type, teeth, ratio

Middle gear

case

Type, teeth, ratio

Final gear case

Type, teeth, ratio

Chassis:

Frame

Suspension:

Front

(type,

travel)

Rear

(type,

travel)

Front

Rear

Brakes:

Front

Rear

Fuel tank

Wheels:

Front

Rear

Tires:

Constant mesh,5

speed, drum shifter

32/13 2.461 13.285

27/17 1.588 8.636

26/20 1.300 7.069

1 1.095 5.955

22/23 0.956 5.201

Shaft drive

Spur gear, 34/32, 1.063

Bevel gear, 19/18, 1.056

Bevel gear, 32/11, 2.909

Tubular steel double cradle

Telescopic fork, 175mm (6.9 in.)

Swing arm, 75mm (3.0 in.)

3.25 H19 Bridgestone

4.00

18 Bridgestone

Dual hydraulicdisc

Single hydraulicdisc

US gal.) Regular leaded or unleaded

1.85

Cast

Aluminum

2.15

Cast

Aluminum

MAINTENANCE SPECIFICATIONS

Engine

Engine Oil Capacity

Oil

and filter change

Oil change

ecommended Iubrican

temperature does not go below

If temperature does not go above

(3.7

(3.4

qt.)

(3.0 US qt.)

SAE

motor oil

SAE

motor oil

Middle gear

case

capacity:

Final Gear case capacity

Recommended Iubr

can

If temperature doesnot go below

5°C (40°F)

If temperature doesnot go above

weather

15°C (60°F)

Exhaust

375cc

(

13 oz.)

300cc

oz.)

SAE 90 Hypoid

gear

oil,

SAE 80 Hypoid gear oil,

SAE80W90 Hypoid gear oil,GL

8.018mmm

-------------

28.285 ±0.05mm 28.13mm

36.303 ± 0.05mm 36.15mm

Cranking pressure

(at

sea

level)

Maximum difference between cylinders

Free length

10 ± 1 kg/cm!(142 ± 14 psi)

1 .0 kg/cm!(14 psi)

INTAKE/EXHAUST

35.6mm

Camshafts

Wire diameter

Number of windings

2.8mm

7.75

Valve stem run

out maximum

Valve

seat

width standard/maximum

.03mm (.0012 in.)

1.3mm (.050 in.)

2.0mm (.080 in.)

Wear

Iim

Camshaft bearing surface diameter 24.97~24.98mm (0.9830~0.9835 in.)

Camshaft

cap clearance

Standard

Maximum

Camshaft runout limit

.020~.054mm (.0008~.002 in.)

.160mm (.006in.)

0.1 mm (.004 in)

Valves

INNER OUTER

INTAKE/EXHAUST

39.9mm

ALLOWABLE T I LT

FROM VERTICAL

OUTER

Spring rate (kg/mm) K1 1.84

K2 2.36

K1 3.32

K2 4.18

Installed length

(valve closed)

Installed pressure

(valve closed)

34.5mm31.5mm

7.5 ± 0.75kg 17.5 ± 1.2kg

Compressed length

(valve open) 23.0mm 26.0mm

3.9mm

6.4

INTAKE EXHAUST

DIRECTION OF WINDINGS

(TOP TO BOTTOM)

Winding

O.D.

15+ 0.3mm

21.6

0.3mm

"B"

"C"

seat

width

"D" margin thickness

Stem diameter

(O.D.)

Guide diameter (I.D.)

rance

(Cold engine)

head diameter

0.1

6~ 0.20mm

0.2

1.3 ±0.15mm

1.2 ±0.2mm

.010mm

-.025mm

.019mm

-.010mm

"B"

face width 2.26 ± 0.57mm

face width

"C"

seat

width

"D" margin thickness

Stem diameter (O.D.)

2.26 ± 0.57mm

1.3 ± 0.15mm

1.2±0.2mm

7 +.025mm

-.040mm

Stem

guide clearance

0.020~0.041mm

EXHAUST

rance

(Cold engine) 0.2 1~0.25mm

head diameter 31

0.2mm

Guide diameter (I.D.)

.019mm

-t

-g

uid

clea

nce 0.035~0.059mm

Cylinder and Piston

Cylinder material

Cylinder liner

Standard bore sizehtandard

Cylinder taper limit

Cylinder out

round limit

Piston clearancehtandard

maximum

Piston Rings

Design

End gap (installed)

Side clearance

Aluminum

Pressed

in;

special

cast iron

68.00~68.02mm

(2.677~2.678 in.)

68.10mm (2.681)

0.05mm (.002 in.)

0.01mm (.0004 in.)

0.050~0.055mm

(.0020~.0022 in.)

0.1mm (.004 in.)

Oil

0.04-0.08mm 0.03-0.07mm

-0.4mm -0.4mm 0.2~0.9mm

Crankshaft and Connecting Rods:

Main bearing oil clearance

Rod bearing oil clearance

Main journalrun

out (maximun)

Oil

Pump

Housing

outer rotor clearance

Outer rotor

inner rotor clearance

Clutch

Friction plate thickness standard

minimum

Clutch plate warp maximum

Clutch spring length standard

minimum

Clutch push rod run

out maximum

Clutch lever freeplay (end of lever)

Transmission shaft run

out maximum

Middle gear

case

lash

0.022~0.044mm (.0009~.0017 in.)

0.032~0.054mm (.0013~.0021 in.)

0.03mm (.0012 in.)

,090~.015mm (.0035~.0059 in.)

.03 ~.09mm (.0011~.0035 in.)

3.0mm (0.12 in.)

2.8mm (0.11 in.)

0.05mm (.002 in)

42.8mm (1.685 in.)

41.5mm (1.634 in.)

0.4mm (.016in.)

13~26mm (0.5~1.0 in)

.08mm (.001 in.)

0.1 ~0.2mm (.004~.008 in.)

Carburetion

Manufacturer

Model,

No.

Main jet

Needle jet

Pilot jet

Starter jet

Jet needles

Clip position

Mikuni

BS34,1J701

No.

145

No.

17.5

No.

4H11/3

Float level

Pilot screw

Air jet, Main

Air jet, Pilot

Throttle valve

Inlet valve

size

Engine idle speed

26.5 ±2.5mm (fromgasket surf

2"turns

.0mm

1.6mm

No. 140

2.0mm

1050 ~ 1150 r.p.m.

Chassis

Ignition timing retarded

nced

advance starts

Wheels and Tires

Rim run

out, vertical

Rim run

out, horizontal

Tire pressure, front, normal riding

High speed or with passenger

Tire pressure, rear,normal riding

High speed or with passenger

Brakes

Recommended fluid

Pad thickness wear limit

Brake disc maximum deflection

Brake disc minimum thickness

Front brake freeplay (end of lever)

Rear brake freeplay (end

pedal)

Minimum boiling point

10° @ 1100 rpm

38.5° ± 1.5°@ 2,900 rpm

1550 + 200rpm

Front forks

Spring (upper) free length

Spring (lower) free length

Spring rate

(0~100

mm travel)

Fork oil capacity (each side)

preload length

(100~175mm travel)

Rear shock absorbers

Spring free length

Spring preload length

Spring rate (0~45mm travel)

(45~75mm travel)

2.0mm (.080 in.)

l.0mm (.040in.)

1.8 (26 p.s.i.)

2.0 kg/cm2 (28 p.s.i.)

2.3 kg/cm2 (33 p.s.i.)

DOT No.3

240°C (464°F)

5.5mm (0.18 in.)

0.15mm (.006 in.)

6.5mm (0.26 in.)

5.0~10.0mm (0.2~0.4 in.)

55.8mm (2.2 in.)

50.8mm (2.0 in.)

448.3mm (17.65 in.)

423.3mm (16.67 in.)

0.5 kg/mm (28 Ibs/in.)

0.6 kg/mm (33.6 Ibs./in.)

170cc (5.75 US fl. oz.)

253mm (9.95 in.)

228 mm (9.0 in.)

1.9 kg/mm (106 Ibs./in.)

2.6 kg/mm (145 Ibs./in.)

Spark plug

Electrode gap

NGK BP

7ES or ChampionN

0.7~ 0.8mm (.028~.032 in)

Spark plug cap resistance

5.0 K ohms

Contact point gap

Spring tension

0.3~0.4mm (.012 ~.016 in)

750 ± 100

(26.5 ±3.5 oz)

Condenser capacity

Insulation resistance

0.22µF ± 10%

10 M ohms or more

Ignition coil type

Spark gap6V

12V

Primary resistance (20°C)

Secondary resistance

(20°C)

itach

CM1

52A

6mm @

100 rpm

7mm @ 5,000 rpm

4.0 ± 0.4 ohms

11.0 ± 1.1K ohms

Starter motor type

Armature coil resistance (2O°C)

Field coil resistance (2O°C)

Brush length standard

minimum

Brush spring pressure

Armature mica undercut

Battery type

Charging rate

Generator

type

No load voltage

Field (inner) coil resistance(20°C)

Stator (outer) coil resistance (20°C)

Regulator type

Reg

ulated vo

age

Core gap

Yoke gap

Point

gap

Starter relay switch

Cut

in voltage

Winding resistance (20°C)

Lighting

Headlight

IIight/stopIight

License light

FlasherI

Flasher pilot light

Meter Iights

High beam indicator light

Oil pressure warning light

Neutral light

~~~

Mitsuba SM

224C

0.007 ohms

0.01 ohms

12.5mm (0.5 in)

5.5mm (0.22 in)

620 ± 60g (22.0 ± 2.0 oz)

0.5 ~ 0.8mm (0.02 ~ 0.03 in)

Yuasa YB 14L

1.4 amps for 10 hours

Hitachi Ld 120

14.5 ± 0.5V

0.48 ± 0.05 ohms

4.04 ± 0.4 ohms

Hitachi TLIZ

14.5 ± 0.5V

0.6 ~

.0mm (.024 ~.040 in)

0.9mm (.035 in)

0.3 ~ 0.4mm (.012 ~.016 in)

Hitachi A104

6.5 V

3.5 ohms

Sealed beam 12V50/40W

12V 8/27W (two bulbs)

12V27W (four bulbs)

12V 3.4W (two bulbs)

1 2 v 3.4w

1 2 v 8W

Torque

Specifications

Spark plug

Cam cap nut

Rod cap

Starter clutch bolt

Engine

1.5 ~ 2.5m

kg (11.0 ~18.0 ft

lbs.)

0.8 ~ 1

kg (6.0 ~ 7.0 ft

lbs.)

3.8m

kg (27 ft

lbs.)

2.8 ~ 3.2m

kg (20~ 23 ft

lbs.)

Shift cam locating bolt

Detent assembly

1.3 ~ 2.1m

kg (9 ~ 15 ft

lbs.)

4.0 ~ 4.5m

kg (29 ~ 32 ft

lbs.)

Transmission bearing caps

Crankcase bolts 8mm

1.8 ~ 2.2m

kg (13 ~ 16 ft

lbs.)

2.0 rn-kg (14 ft-lbs.)

10mm

Clutch holding nut

Clutch spring screws

3.7m

kg (27 ft

lbs.)

8 m-kg (58 ft-lbs)

0.8 ~ 1

kg (6.0 ~ 7.0 ft

lbs.)

Middle gear case mounting screws

Rotor holding bolt

2.0 ~ 2.5m

kg (14 ~ 18 ft

lbs.)

3.0 ~

4.0m

kg (22 ~ 29 ft

lbs.)

Bearing housing bolt

Oil

pipe

union bolt

12mm

8.0 ~ 11.0m

kg (58 ~ 80 ft

lbs.)

2.0 ~

2.4m

kg (14 ~ 17 ft

lbs.)

2.0 ~ 2.2m

kg (14 ~ 16 ft

lbs.)

Oil pump drive gear nut

Crankshaft turning nut

Cylinder head 8mm

8.0 ~ 12.0m

kg (58 ~ 87 ft

lbs.)

1.5 ~ 2.9m

kg (11 ~ 21 ft

lbs.)

2.0m

kg (14 ft

lbs.)

10mm

Cylinder holding nuts

3.5m

kg (25 ft

lbs.)

2.0m

kg (14 ft

lbs.)

Camshaft capnuts

Engine mounting bolts 10mm

kg (7 ft

lbs.)

5.0 ~ 6.0m

kg (36 ~ 43 ft

lbs.)

Engine oil drain plug

Oil

filter mounting bolt

Middle gear drain plug

Front axle nut

Frontaxle holder nuts

Rear axle nut

Rear axle pinch bolt

Chassis

3.9 ~ 4.7m

kg (28 ~ 34 ft

lbs.)

3.0 ~ 3.4m

kg (22 ~ 25 ft

lbs.)

3.9 ~ 4.7m

kg (28 ~ 34 ft

lbs.)

7.0 ~ 10.0m

kg (50 ~ 72 ft

lbs.)

1.3 ~ 2.3m

kg (9 ~ 17 ft

lbs.)

12.0 ~ 18.0m

kg (87 ~ 130 ft

lbs.)

0.45 ~ 0.75m

kg (3.0 ~ 5.0 ft

lbs.)

Brakes

Caliper support bolt

Caliper mounting bolt

Brakehoseunion bolt

Disc mounting bolt

Front fork pinch bolt

Steering stem top bolt

Swing arm pivot lock nut

Rear shock absorber nut

1.5 ~ 2.0 m-kg (11 ~ 15 ft-lbs.)

4.5 ~ 5.0m

kg (28~ 35 ft

lbs.)

2.3 ~ 2.8m

kg (16 ~ 20 ft

lbs.)

1.7 ~ 2.2m

kg (12 ~ 16 ft

lbs.)

1.3 ~ 2.3 m-kg (9 ~ 17 ft-lbs.)

6.6 ~ 10.5m

kg (48~ 76 ft

lbs.)

8.0 ~ 10.0m

kg (58 ~ 72 ft

lbs.)

2.3 ~ 3.7m

kg (20 ~ 27 ft

lbs.)

Components should be room temperature.

500 - 600

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