Triumph 1978 Guía del usuario

O\N

ERS

ANDBOOK

FOR

197

MODEL

,----NNEVI E

715D

140

PART

NO.

99-7007

.A.

EDITION

{

....

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Specialthanksto



Walter



forcontributingthismanual



OWNER'S HANDBOOK

FOR

BO EVILLE 750

UNIT CONSTRUCTION TWIN

1978

MODEL

AI!

rights reserved. No part of this publication

may be reproduced without permission.

Meriden Motorcycles Ltd., Meriden Works, Allesley, Covemry, England.

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INDEX

Page

Air filter......... .......

..........

...

.......... .

....

.....

.......

....

..............

........ 33

Brakes............

...

...............

...

...................

.....

...................

...........

8rake adjustment .

...

... ... ...

.......... .................. .

...

..............

......

Carburetor...........

...

.......

....

................... .........................

....

.......

...

Chain adjustment.........................................

...

................

....

.... .......

Cleaning your motorcycle........

...

.......

....

.......

.....

..... .................

.....

Controls

....

...

......

...

.......

.............................

....

...

....

......... 10

Electrical equipment....

...

....

.............

....

...

....

.........

...

..................

....

. 34

Front forks...............

............................................

......................... 22

General description

...

.......................................

............................

Guarantee arrangements ......................

................

...

..............

........

tion timing....................

...................

.................

.....

....

.............. 28

Lubrication

....

...

......................

...

................

.....

...................

.....

41,42

Oil changing...

......

...

..........

...

........................

..........

....

Rear suspension ......

.....

...

...:

...

:.......................

...

...................

Routine maintenance

....

~~'

~~1

...

~.r

;

~..

..........

.....

. .

.....

.......

Breaking-in ......

.....

...

.....

........

............:..............................

...

...... 13

Sparking plug ...........

........

...

........ ............

....

..................

....

Starting.......

.....

.........

...

................................................

.......... 12

Tires .

............

...

...................

...

...................

....

.................

....

........

....

Useful data.........................

...

......

....

..............

...

....................

Valve adjustment.................

.........

...

.......

....

.......

...

.....

............... 13

Wheels

...

.......................

.....

....................................................

....

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ILLUSTRATION INDEX

Fig. Page

1 Control layout .

.........

......

........

.......

....

...

"'.

.....

...

2 To adjust valve operating mechanism ........

.........

....

......

.. ..

...

3 Showing arrangement for bleeding the front brake....

...

.. .. ..

...

4 Showing the brake reservoir fluid level and cap .............

......

5 To adjust rear brake..

...

.....

....

...........................

.................

...

6 To adjust the primary chain......

...

.....

......

...

........

.......

7 To adjust the rear suspension springs ............

........

...

.........

8 Contact breaker.................

...............

...

........

...

......

...

...........

....

9 Gearbox drain and level plugs.........

....

................

...

....

...

.....

...

10 Amal concentric carburetor.........

.....

...

..........

...

.......

...

.....

~13

To secure the rectifier...................

...........

..................

........

37'

Zener diode, model ZD71S..........

...

.........

.....

..............

...

13 Wiring diagram....

.......

...

.......................

............

....

.....

14 Lubrication pOints .....

...

...............

.....

.......

....

............

...

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INTRODUCTION

The

ner's Handbook

cludes all the information that the majority of

owners will require.

you require more information for major repairs

there is available a Workshop Manual but this is intended for those

having basic mechnical knowledge and workshop facilities.To obtain the

Workshop Manual order from your local Triumph dealer or distributor as

not supply parts or service literature direct from the factory to

individual customers.

Where specialised advice is required beyond the ability of the dealer,

then you should write to your distributor who will act on our behalf. Unless

the full engine number is quoted it

often difficult to identify the type of

motorcycle and give a helpful reply. Any information which may have a

bearing on the subject should be included, particularly details of any

additions or alterations to the standard equipment.

Where a guarantee claim is involved, consul your dealer or distributor

who may

able to provide a replacement to enable

ur motorcycle to

use

d whilst the defective

is returned

s distributor. Guarantee

claims in respect of prop

etary components should be forwarded by your

dealer to his distributor.

The terms of the U.S. Triumph guarantee can be obtained from your

dealer.

ClassicBike.biz

Bonneville

750 T140-E

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USEFUL DATA

MOTOR

Bore and Stroke -mm .......................................

Bore and Stroke -

......................

...

......................

Capacity -cu. in

...

................

...

.. ..

.....

......................

Compression Ratio.

..................

...

..................

...,

Tappet Clearance, Inlet and Exhaust -Cold mm.......

Tappet Clearance, Inlet and Exhaust -Cold

.........

Valve timing checked at nil tappet clearance

76 x

2.993 x 3.228

7.9:1

0.203,0.15

OOB,

0.006

Valve lift: Inlet opens 0.190ins (4.83mm) at T.D.C.

Exhaust closes 0.130ins (3.27mm) at T.O.C.

IGNITION -Timing (Before top centre)

Crankshaft position (Fully advanced) .......................... 380

Contact Breaker Gap - mm

...

.... ............................. 0.35 -0.40

Contact Breaker Gap -in........

...

.......

...................... 0.014 - 0.016

SPARK PLUGS

Type ....

....................

.........................

...

....

...

. Champion

Point Gap -

.....

....

.................

...

....

.......

.........

0.635

Point Gap -in

.....

.......

...

........

...

...........

0.025

CAPACITIES

Gas Tank...

..........................

.. ..

.....

......

....

...........

2V2

galls

Oil Reservoir

...

... .........................

...

....

...

.. .. ..

......

... ...

... 4.B U.S. pints

Gearbox

c...........

.. ..

.....

..................

...........

...

500

Primary chaincase (Initial fill) - e.c......

...

................ 150

Front forks (each leg) - c.c.

.. ..

.............

.. ..

...............

190

Front brake hydraulic system -

c. ......

....

..............

prox 189

(1fJ

imperial pint)

CARBURETORS

Amal Type....... ..................................

...........

.......

R2930/1,

L2930/2

Main

Jet

.....

....................

...........................

...

....

200

Needle Jet.........

...

.......

.. ..

...

......................... .105 (2928/030)

Needle Type.......

......

............................................. 2C3

Needle Position..............

.......................

...

.. ..

...

....... 2

Throttle Valve Cutaway..........

...

................................ 3

Pilot Jet

...

............. .................................. ..................

...

Starter Jet.......

....................................

...............

Primary Air

Jet..

.......................................................... 3.5

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FUEL

Octane Rating (minimum)

...

...............

...........

...

.... 97

Premium grade

Hydr

aulic front brake fluid .

...

.....

........

...

........... To conform with

SPROCKETS

DOT 3 Federal

motor vehic

standards 116

arbox..................

...

....... ......

.....

...

.........

...

20T

Rear

Whe

... ...

....

...

....

.......

.............

.. .. ..

47T

CHAINS

Primary -

pitch x V4in wide, Triplex,

nks

...

....

Secondary

o/ai

n pitch x

3/sin

wide, links

...

.. .. ..

...... 106

GEAR

RATIOS

5th

Top

.....

.................

......... .

.......

............

4.70

4th Fourth......

...

....,......

..................

.........

......... 5.59

3rd Third

...

....

...............

.........

...

.....

...

6.58

2nd Second .......

...

..........................................

...

.... 8.63

1st Bottom..

...

..................

....

...

...........

.. ..

........ 12.25

Engine r.p.m. @ 10 m.p.h.

top gear

.. ..

....

.. .. .. ..

......

627

TIRE SIZE

Front.

............

...

..............

................

.. ..

.....

....

.......... 4.10 x 19

ear..

..................

....

............

..............

...... 4.10 x

TIRE PRESSURES

Front

/sq

. in.....

......

.......

........

...

....

. 28

Rear

Ib/

sq.

.....

...

....

.......

...

.'..

...

....

.. ..

...

BUL

Headlight 12v

45/40W

Prefocus .............

...

....

.......

...

Parking light 12v 6W M.C.C........

...

.....

........

Stop/Tail

light 12v 5/21 W (offset pin) ........

....

.. ..

.... .

Speedometer 12v

M.E.S...

.......

....................

...

Ignition warning light 12v

.....

...

.....

....

........

...

Hi-beam warning light 12v

.........................

Indicator warning light 12v

.........

...

......

............

Direction indicators 12v

........

...........

......

...

Fuse rating (Amperes)..............

...

......... .......

......... .

Lucas 410

Lucas 989

Lucas 380

Lucas 987

Lucas

281

Lucas

281

Lucas

281

Lucas 382

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OVERALL

DIMENSIONS

Length -

. .........

............

...

....

... .................. .

87.5

Width - in....... ..............

......"......

....

....................... 33.0

Seat height -

. "

.....

...

....

.... ..... ......

.......

...

....

...

31.0

Weight -

. (unladen) ..

..............

.. ..

" .....

..........

395

..:..

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