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1995-1999 Triumph Thunderbird 900 Service & Repair Manual
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U1
°LI^^ I ^ ^H
SERVICE MANUAL
Part No: 3850300. Issue 8, 06/99
TROPHY
DAYTONA
DAYTONA SUPER 3
TRIDENT
SPRINT/SPORT/EXECUTIVE
TIGER
SPEED TRIPLE
THUNDERBIRD/SPORT
LEGEND TT
ADVENTURER
TRIUMPH DESIGNS LIMITED
JACKNELL ROAD, DODWELLS BRIDGE INDUSTRIAL ESTATE, HINCKLEY,
LEICESTERSHIRE LE10 3BS, ANGLETERRE

Motorcycle
Service Manual
This document is protected by copyright and may not, in whole or part be stored in a retrieval system, or
transmitted in any form or by any means, copied, photocopied, translated or reduced to any machine-
readable form without prior consent in writing from Triumph Motorcycles Limited.
No liability can be accepted for any inaccuracies or omissions in this publication, although every possible
care has been taken to make it as complete and accurate as possible.
Triumph Motorcycles Limited reserves the right to make changes and alter specifications without prior
notice and without incurring an obligation to make such changes to products manufactured previously. See
your authorised Triumph Dealer for the latest information on product improvements incorporated after this
publication.
All information contained in this publication is based on the latest product information available at the time
of publication. Illustrations in this publication are intended for reference use only and may not depict actual
model component parts.
All rights reserved, © 1999 Triumph Motorcycles Limited

CONTENTS
Introduction
General Information
Servicing
Cylinder Head
Clutch
A
^
Balancers'
Crankshaft/Rods/Pistons'
Transmission
Lubrication
I
Fuel System/Exhaust'
Cooling System
Rear Suspension/Final Drive
•
Front Suspension/Steering
I
Brakes'
Wheels/Tyres
•
Frame/Fairings
I
Electrical System/Ignition
I
Appendix
•

INTRODUCTION How to use this manual
To assist in the use of this manual, the section title is
given at the top.
Each major section starts with a contents page, listing
the information contained in the section.
The individual steps comprising repair operations are
to be followed in the sequence in which they appear.
Adjustment and repair operations include reference to
Service Tool numbers and the associated illustration
depicts the tool.
Where usage is not obvious the tool is shown in use.
Adjustment and repair operations also include
reference to wear limits, relevant data, torque figures,
specialist information and useful assembly details.
Particularly important information is presented in the
following form:
A
WARNING: This warning symbol
identifies special instructions or
procedures which, if not correctly followed, could
result in personal injury, or loss of life.
CAUTION: This caution symbol identifies
• special instructions or procedures
which, if not strictly observed, could result in
damage to or destruction of equipment.
NOTE:
• This note symbol indicates points of particular
interest for more efficient and convenient
operation.
INTRODUCTION ^^`, ` s
This manual is designed primarily for use by trained
technicians in a properly equipped workshop.
However, it contains enough detail and basic
information to make it useful to the owner who desires
to pe rf orm his own basic maintenance and repair work.
The work can only be carried out if the owner has the
necessa ry hand and special service tools to complete
the job.
A basic knowledge of mechanics, including the proper
use of tools and workshop procedures is necessary in
order to car ry out maintenance and repair work.
satisfactorily. Whenever the owner has insufficient
experience or doubts his ability to do the work, all
adjustments, maintenance, and repair work must be
unde rt aken by an authorised Triumph Dealer.
In order to perform'the
'
work efficiently and to avoid
costly mistakes, read the text and thoroughly
familiarise yourself with procedures before sta rt ing
work.
All work should be performed with great care and in a
clean working area with adequate lighting.
Always use the correct special service tools or
equipment specified. Under no circumstances use
makeshift tools or equipment since the use of
substitutes may adversely affect safe operation.
Where accurate measurements are required, they can
only be made using calibrated, precision instruments.
For the duration of the warranty period, all repairs and
scheduled maintenance must be performed by an
authorised Triumph Dealer.
To maximise the life of your Motorcycle:
Accurately follow the maintenance requirements of
the Periodic Maintenance Chart in the Service
Manual.
Do not allow problems to develop. Investigate
unusual noises and changes in the riding
characteristics of the motorcycle. Rectify all
problems as soon as possible (immediately if
safety related).
Use only Triumph Motorcycle Parts as listed in the
parts catalogue/parts microfiche.
Follow the procedures in this manual carefully and
do not take short cuts.
Keep complete records of maintenance and repair
with dates and any new parts installed.
Use only approved lubricants, as specified in the
Owner's Handbook, in the maintenance of the
motorcycle.

INTRODUCTION
ASBESTOS REFERENCES
This warning may apply to
References
any of the following
KST
components or any
References to the left-hand or right-hand side given in
assembly containing one or
this manual are made when viewing the motorcycle
more of components:-
from the rear.
WARNING
CONTAINS
Brake Shoes or Pads
Operations covered in this manual do not always
ASBESTOS
Clutch Friction Material
include reference to testing the motorcycle after repair.
Breathing asbestos
Gaskets
It is essential that work is inspected and tested after
dust
to healtthrous
Insulators
completion and if necessary a road test of the
motorcycle is carried out particularly where safety
Follow safety
instructions I
related items are concerned.
SAFETY INSTRUCTIONS
• Operate if possible out of doors or in a well
ventilated place.
• Preferably use hand tools or low speed tools
equipped with an appropriate dust extraction
facility.
• Dampen dust and place in a properly closed
receptacle. Dispose of the closed receptacle
safely.
• Never use an airline to blow dust from
components
TAMPERING WITH NOISE CONTROL SYSTEM
PROHIBITED
Owners are warned that the law may prohibit:
(a) The removal or rendering inoperative by any
person other than for purposes of maintenance,
repair or replacement, of any device or element
of design incorporated into any new vehicle for
the purpose of noise control prior to its sale or
delivery to the ultimate purchaser or while it is in
use; and
(b) the use of the vehicle after such device or
element of design has been removed or rendered
inoperative by any person.
Dimensions
The dimensions quoted are to design engineering
specification with service limits where applicable.
During the period of running-in from new, certain
adjustments may vary from the specification figures
given in this manual. These will be reset by the Dealer
at the After Sales Service, and thereafter should be
maintained at the figures specified in this manual.
REPAIRS AND REPLACEMENTS
Before removal and disassembly, thoroughly clean the
motorcycle. Any dirt entering the engine or other parts
will work as an abrasive and shorten the life of the
motorcycle. Particular attention should be paid when
installing a new part, that any dust or metal filings are
cleared from the immediate area.
Force
Common sense should dictate how much force is
necessary in assembly and disassembly. If a part
seems especially difficult to remove or install, stop and
examine what may be causing the problem. Never
lever a component as this will cause damage both to
the component itself and to the surface being levered
against.
Whenever tapping to aid removal of an item is
necessary, tap lightly using a hide or plastic faced
mallet.

INTRODUCTION
Edges
Watch for sharp edges, especially during engine
disassembly and assembly. Protect the hands with
industrial quality gloves when lifting the engine or
turning it over.
When replacement parts are required, it is essential
that only genuine Triumph parts are used.
Safety features and corrosion prevention treatments
embodied in the motorcycle may be impaired if other
than genuine Triumph parts are fitted. In certain
territories, legislation prohibits the fitting of parts not to
the manufacturer's specification.
Tightening procedure
Generally, when installing a part with several bolts,
nuts or screws, they should all be started in their holes
and tightened to a snug fit, evenly and in a cross
pattern. This is to avoid distortion of the part and/or
causing gas or oil leakage. Conversely, bolts, nuts, or
screws, should all be loosened (in sequence if
specified) by about a quarter of turn and then
removed.
Where there is a tightening sequence specified in this
Service Manual, the bolts, nuts, or screws must be
tightened in the order and by the method indicated.
Torque wrench setting figures given in this Manual
must be observed. The torque tools used must be of
accurate calibration.
Locking devices, where specified, must be fitted. If the
efficiency of a locking device is impaired during
removal it must be renewed. This applies particularly
to micro-encapsulated fixings which must always be
replaced if disturbed. Where necessary, the text in this
manual will indicate where such a fixing is used.
iv

General Information
CONTENTS
General precautions and fitting instructions
I
g
nitionsystem
safety precautions ..................................... 1.2
Dan
g
eroussubstances
................................. ............ 1.2
En
g
ineoils
.......................................................... 1.2
Healthprotection precautions ........................................... 1.2
Environmentalprotection precautions ........... ......................... 1.3
Brakes............................................................. 1.3
Jackingand li fting .............................. ..................... 1.4
Precautionsagainst damage .......................................... 1.4
En
g
inecoolant
caps and plugs ........................................ 1.4
Cleaningcomponents ................................................. 1.4
Lubrication.......................................................... 1.5
Jointsand joint faces ................................................. 1.5
Gaskets, O-rings .................................................... 1.5
Liquidgasket, non-permanent locking agent ............................. 1.5
Screwthreads ....................................................... 1.5
Lockingdevices ....................................................... 1.6
Fittin
g
a
split pin ..................................................... 1.6
Circli
p
s
, retaining rings .............................................. 1.6
Selflocking nuts ..................................................... 1.6
Enca
p
sulatedbolt
.................................................... 1.6
Oiland grease seals ................................................. 1.6
Press............................................................... 1.6
Ballbearing ......................................................... 1.6
Fuel handling precautions
General .................... ...................... 1.7
Petrol- gasoline ...................................... ............. 1.7
Fueltank removal ......................... ........ ... ... ...... 1.7
Chassisrepairs ......... ............................................ 1.7
Electrical precautions
Batterydisconnectin
g ................................................ 1.8
Greasefor electrical connectors ....................................... 1.8
Disciplines
.
.......................................................... 1.9
Electricalwires ......................................................... 1.9
Re
p
lacement
p
arts
. .......................... ........................ 1.9
Inspection.................................................. ...... 1.9
Servicedata ........................................................ 1.9
ServiceTools ............................................................ 1.10
Full Specification - Trophy 1200, Trophy 900 ............................... .1.13
Full Specification - Daytona 1000, Daytona 750 ..... ......................... 1.17
Full Specification - Daytona 1200, Daytona 900 ...................... ..... 1.21
Full Specification - Daytona Super 3 & Speed Triple ............................ 1.25
Full Specification - Trident / Sprint 900, Trident 750 ......................... 1.29
Full Specification - Thunderbird Sport 900, Thunderbird/Adventurer 900 ........ 1.33
Full Specification - Legend TT / Tiger 900 .................................. 1.37
Torques
................................................................ 1.41
1.1

1 GENERAL INFORMATION T
IGNITION SYSTEM SAFETY
PRECAUTIONS
WARNING: The ignition system
produces extremely high voltages. Do
not touch any part of the ignition system or any
cables while the engine is running.
An electric shock caused by contact with the
ignition system may lead to illness, injury or death.
WARNING: Wearers of surgically
i mplanted heart pacemaker devices
should not be in close proximity to ignition circuits
and or diagnostic equipment.
The ignition system and any diagnostic equipment
may interrupt the normal operation of such
devices causing illness or death.
DANGEROUS SUBSTANCES
WARNING: Many liquids and other
substances used in motor vehicles are
poisonous and should under no circumstances be
consumed and should, as far as possible, be kept
from contact with the skin. These substances
among others include acid, anti-freeze, asbestos,
brake fluid, fuel, lubricants, and various
adhesives. Always pay close attention to the
instructions printed on labels and obey the
instructions contained within. These instructions
are included for your safety and well being.
NEVER DISREGARD THESE INSTRUCTIONS!
fluoroelastomers
WARNING: fluoroelastomer material is
used in the manufacture of the valve stem
oil seals in Triumph motorcycles.
In fire conditions involving temperatures greater
than 315°C this material will decompose and can
then be potentially hazardous. Highly toxic and
corrosive decomposition products, including
hydrogen fluoride, carbonyl fluoride, fluorinated
olefins and carbon monoxide can be generated
and will be present in fumes from fires.
In the presence of any water or humidity hydrogen
fluoride may dissolve to form extremely corrosive
liquid hydrofluoric acid.
If such conditions exist, do not touch the material
and avoid all skin contact. Skin contact with liquid
or decomposition residues can cause painful and
penetrating burns leading to permanent,
Irreversible skin and tissue damage.
ENGINE OILS
WARNING: The oil may be hot to the
Contact with hot oil may cause the
skin to be scalded or burn ed.
WARNING: Prolonged or repeated
contact with engine oil can lead to skin
dryness, irritation and dermatitis. In addition used
engine oil contains potentially harmful
contaminants which can cause cancer. Wear
suitable clothing and avoid skin contact.
Health Protection Precautions
• Avoid prolonged and repeated contact with oils,
particularly used engine oils.
• Wear protective clothing, including impervious
gloves where practicable.
• Do not put oily rags in pockets.
• Overalls must be cleaned regularly. Discard
heavily soiled clothing and oil impregnated
footwear.
• First aid treatment should be obtained
immediately for open cuts and wounds. Always
be aware of who your nearest first aider is and
where the medical facilities are kept.
• Use barrier creams, applying before each work
period to protect the skin from the effects of oil
and grease and, to aid removal of the same after
completing work.
• Wash with soap and water to ensure all oil is
removed (skin cleansers and nail brushes will
help). Preparations containing lanolin replace the
natural skin oils which have been removed.
• Do not use petrol, kerosene, diesel fuel, gas oil,
thinners or solvents for cleaning skin.
• If skin disorders develop, obtain medical advice
without delay.
• Where practicable, degrease components prior to
handling.
A
WARNING: Any risk of eye injury must be
avoided. Always wear eye protection
when using a hammer, air line, cleaning agent or
where there is ANY risk of flying debris or
chemical splashing
1.2

GENERAL INFORMATION 1
ENVIRONMENTAL PROTECTION
PRECAUTIONS
CAUTION: Do not pour oil on the ground,
down sewers or drains, or into water
courses. To prevent pollution of water courses
etc., dispose of used oil sensibly. If in doubt
contact your local authority.
Burning of used engine oil in small space heaters or
boilers can be recommended only for units of
approved design. If in doubt check with the appropriate
local authority and/or manufacturer of the approved
appliance.
Dispose of used oil and used filters through authorised
waste disposal contractors, to licensed waste disposal
sites, or to the waste oil reclamation trade. If in doubt,
contact the Local Authority for advice on disposal
facilities.
BRAKES
A
WARNING: Brake fluid is hygroscopic
which means it will absorb moisture from
the air. The absorbed moisture will greatly reduce
the boiling point of the brake fluid causing a
reduction in braking efficiency.
Replace brake fluid in line with the Periodic
Maintenance chart. A dangerous riding condition
could result if this important maintenance item is
neglected!
Do not spill brake fluid onto . any area of the
bodywork as this will damage any painted or
plastic surface.
Always use new brake fluid from a sealed
container and never use fluid from an unsealed
container or from one which has been previously
opened.
Do not mix different brands of fluid. Check for fluid
leakage around brake fittings, seals and joints.
Check regularly for brake hose damage.
FAILURE TO OBSERVE ANY OF THE ABOVE
WARNINGS MAY REDUCE BRAKING EFFICIENCYi
LEADING TO AN ACCIDENT.
WARNING: If there has been an
appreciable drop in the level of the fluid in
either brake fluid reservoir, ' consult your
authorized Triumph Dealer for advice before
riding.
If the brake lever or pedal feels soft when it is
applied, or if the lever/pedal travel becomes
excessive, there may be air in the brake lines or the
brake may be defective.
It is dangerous to operate the motorcycle under
such conditions and remedial action must be
taken by your authorized Triumph Dealer before
riding the motorcycle.
Failureto take remedial action may reduce braking
efficiency leading to an accident.
WARNING: Use only D.O.T. 4
specification brake fluid as listed in the
general information section of this manual. The
use of brake fluids other than those D.O.T. 4 fluids
listed in the general information section may
reduce the efficiency of the braking system
leading to an accident.
Failure to change the brake fluid at the interval
specified in the periodic maintenance chart may
reduce braking efficiency resulting in an accident.
WARNING: Never use mineral based
grease in any part of the braking system
or in any area where contact with the braking
system is possible. Mineral based grease will
damage the hydraulic seals in the calipers and
master cylinders.
Damage caused by contact with mineral based
grease may reduce braking efficiency resulting in
an accident.
1.3
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