2021

SERVICE MANUAL

MT-07

MTN660M

MTN690M

MTN690

BAT-28197-E1

EAS20003

IMPORTANT

This manual was produced by the Yamaha Motor Company, Ltd. primarily for use by Yamaha dealers

and their qualified mechanics. It is not possible to include all the knowledge of a mechanic in one man-

ual. Therefore, anyone who uses this book to perform maintenance and repairs on Yamaha vehicles

should have a basic understanding of mechanics and the techniques to repair these types of vehicles.

Please refer to “BASIC INFORMATION” (separate volume, Y0A-28197-E0*) for basic instructions that

must be observed during servicing.

Repair and maintenance work attempted by anyone without this knowledge is likely to render the vehi-

cle unsafe and unfit for use.

Yamaha Motor Company, Ltd. is continually striving to improve all of its models. Modifications and sig-

nificant changes in specifications or procedures will be forwarded to all authorized Yamaha dealers and

will appear in future editions of this manual where applicable.

TIP

• * If the contents of the manual are revised, the last digit of the manual number will be increased by

one.

• Designs and specifications are subject to change without notice.

EAS30001

IMPORTANT MANUAL INFORMATION

Particularly important information is distinguished in this manual by the following notations.

This is the safety alert symbol. It is used to alert you to potential per-

sonal injury hazards. Obey all safety messages that follow this symbol

to avoid possible injury or death.

A WARNING indicates a hazardous situation which, if not avoided, could

result in death or serious injury.

A NOTICE indicates special precautions that must be taken to avoid

damage to the vehicle or other property.

A TIP provides key information to make procedures easier or clearer.

WARNING

NOTICE

TIP

EAS20002

MTN660M/MTN690M/MTN690

SERVICE MANUAL

©2021 by Yamaha Motor Co., Ltd.

First edition, March 2021

All rights reserved.

Any reproduction or unauthorized use

without the written permission of

Yamaha Motor Co., Ltd.

is expressly prohibited.

EAS20004

HOW TO USE THIS MANUAL

This manual is intended as a handy, easy-to-read reference book for the mechanic. Comprehensive

explanations of all installation, removal, disassembly, assembly, repair and check procedures are laid

out with the individual steps in sequential order.

• The manual is divided into chapters and each chapter is divided into sections. The current section title

“1” is shown at the top of each page.

• Sub-section titles “2” appear in smaller print than the section title.

• To help identify parts and clarify procedure steps, there are exploded diagrams “3” at the start of each

removal and disassembly section.

• Numbers “4” are given in the order of the jobs in the exploded diagram. A number indicates a disas-

sembly step.

• Symbols “5” indicate parts to be lubricated or replaced.

Refer to “SYMBOLS”.

• A job instruction chart “6” accompanies the exploded diagram, providing the order of jobs, names of

parts, notes in jobs, etc. This step explains removal and disassembly procedure only. For installation

and assembly procedure, reverse the steps.

• Jobs “7” requiring more information (such as special tools and technical data) are described sequen-

tially.

1

7

3

5

4

6

2

G088877

EAS20005

SYMBOLS

The following symbols are used in this manual for easier understanding.

TIP

The following symbols are not relevant to every vehicle.

SYMBOL

DEFINITION

SYMBOL

DEFINITION

Serviceable with engine mounted

Gear oil

Filling fluid

Molybdenum disulfide oil

Lubricant

Brake fluid

Special tool

Wheel bearing grease

Tightening torque

Lithium-soap-based grease

Wear limit, clearance

Molybdenum disulfide grease

Engine speed

Silicone grease

Electrical data

Apply locking agent (LOCTITE®).

Engine oil

Replace the part with a new one.

G

M

BF

B

T R

.

.

LS

M

S

LT

E

New

GENERAL INFORMATION

1

SPECIFICATIONS

2

PERIODIC CHECKS AND

ADJUSTMENTS

3

CHASSIS

4

ENGINE

5

COOLING SYSTEM

6

FUEL SYSTEM

7

ELECTRICAL SYSTEM

8

SELF DIAGNOSTIC

9

EAS10003 TABLE OF CONTENTS

1

2

3

4

5

6

7

8

9

GENERAL INFORMATION

IDENTIFICATION..............................................................................................1-1

VEHICLE IDENTIFICATION NUMBER......................................................1-1

MODEL LABEL...........................................................................................1-1

FEATURES.......................................................................................................1-2

MULTI-FUNCTION METER UNIT..............................................................1-2

SPECIAL TOOLS .............................................................................................1-6

IDENTIFICATION

1-1

EAS20007

IDENTIFICATION

EAS30002

VEHICLE IDENTIFICATION NUMBER

The vehicle identification number “1” is stamped

into the right side of the steering head pipe.

EAS30003

MODEL LABEL

The model label “1” is affixed to the frame under

the passenger seat. This information will be

needed to order spare parts.

1

1

FEATURES

1-2

EAS20008

FEATURES

EAS30982

MULTI-FUNCTION METER UNIT

The multi-function meter unit is also equipped

with a brightness control mode.

WARNING

EWA12423

Be sure to stop the vehicle before making

any setting changes to the multi-function

meter unit. Changing settings while riding

can distract the operator and increase the

risk of an accident.

TIP

The multi-function meter functions are controlled

using the “TRIP/INFO” switch.

Switching the display units

The display units can be switched between kilo-

meters and miles.

To switch the display units

1. Set the multi-function display to the odome-

ter, and then turn the vehicle off.

2. While pushing the “TRIP” switch, turn the ve-

hicle on.

3. Continue to push the “TRIP” switch until the

display units change.

Speedometer

The speedometer shows the vehicle’s traveling

speed.

Tachometer

The tachometer allows the rider to monitor the

engine speed and keep it within the ideal power

range.

NOTICE

ECA19660

Do not operate the engine in the tachometer

red zone.

Fuel meter

The fuel meter indicates the amount of fuel in the

fuel tank. The display segments of the fuel meter

disappear from “F” (full) towards “E” (empty) as

the fuel level decreases. When approximately

2.7 L (0.71 US gal, 0.59 Imp.gal) of fuel remains,

the last segment starts flashing. Refuel as soon

as possible.

TIP

If a problem is detected in the electrical circuit,

1. Eco indicator “ECO”

2. Speedometer

3. Tachometer

4. Transmission gear display

5. Clock

6. Fuel meter

7. Multi-function display

1. “TRIP/INFO” switch

2

1

3

6

7

5

4

1

1. Tachometer

2. Tachometer red zone

Red zone

10000 r/min and above

1. Fuel meter

1

2

1

FEATURES

1-3

the fuel level segments will flash repeatedly. Re-

fer to “SIGNALING SYSTEM” on page 8-19.

Eco indicator

This indicator comes on when the vehicle is be-

ing operated in an environmentally friendly, fuel-

efficient manner. The indicator goes off when

the vehicle is stopped.

TIP

Consider the following tips to reduce fuel con-

sumption:

• Avoid high engine speeds during acceleration.

• Travel at a constant speed.

• Select the transmission gear that is appropri-

ate for the vehicle speed.

Clock

The clock uses a 12-hour time system.

To set the clock

1. With the display in the odometer, push the

“TRIP” switch until the hour digits start flash-

ing.

2. Use the “TRIP” switch to set the hours.

3. Push the “INFO” switch and the minute digits

start flashing.

4. Use the “TRIP” switch to set the minutes.

5. Push the “INFO” switch to confirm the set-

tings.

Transmission gear display

This display shows the selected gear. The neu-

tral position is indicated by “–” and by the neutral

indicator light.

Multi-function display

The multi-function display is equipped with the

following:

• an odometer (ODO)

• two tripmeters (TRIP 1 and TRIP 2)

• a fuel reserve tripmeter (TRIP F)

• an instantaneous fuel consumption display

(km/L, L/100 km, or MPG)

• an average fuel consumption display

(AVE_ _._ km/L, AVE_ _._ L/100 km, or

AVE_ _ _._ MPG)

• a coolant temperature display (_ _ C)

• an air temperature display (Air_ _ C)

Push the “TRIP” switch to change the display in

the following order:

ODO  TRIP 1  TRIP 2  TRIP F  km/L or

L/100 km or MPG  AVE_ _._ km/L or AVE_ _._

L/100 km or AVE_ _._ MPG  _ _ C  Air_ _

C  ODO

TIP

• The fuel reserve tripmeter appears only when

you are low on fuel.

• Push the “INFO” switch to change the display

in the reverse order.

1. Eco indicator “ECO”

1. Clock

1

1

1. Transmission gear display

1. Multi-function display

1

1

FEATURES

1-4

Odometer

The odometer shows the total distance traveled

by the vehicle.

TIP

The odometer will lock at 999999 and cannot be

reset.

Tripmeters

The tripmeters show the distance traveled since

they were last reset.

To reset a tripmeter, change the display to the

tripmeter you want to reset, and while the digits

are flashing, push the “INFO” switch until it is re-

set.

TIP

The tripmeters will reset and continue counting

after 9999.9 is reached.

Fuel reserve tripmeter

If the last segment of the fuel meter starts flash-

ing, the display automatically changes to the fuel

reserve tripmeter “TRIP F” and starts counting

the distance traveled from that point.

To reset the fuel reserve tripmeter, change the

display to the fuel reserve tripmeter, and while

the digits are flashing, push the “INFO” switch

until it is reset.

TIP

If you do not reset the fuel reserve tripmeter

manually, it will reset automatically and disap-

pear from the display after refueling and travel-

ing 5 km (3 mi).

Instantaneous fuel consumption display

This display shows the fuel consumption under

the current riding conditions. It can be set to ei-

ther “km/L” or “L/100 km”, or “MPG” when using

miles. To switch the fuel consumption measure-

ment units, push the “TRIP” switch until the mea-

surement units change.

• “km/L”: the distance that can be traveled on 1.0

L of fuel.

• “L/100 km”: the amount of fuel necessary to

travel 100 km.

• “MPG”: the distance that can be traveled on

1.0 Imp.gal of fuel.

TIP

When traveling under 10 km/h (6 mi/h), “_ _._” is

displayed.

TIP

The instantaneous fuel consumption function

should be used for general reference only. Do

not use this figure to estimate the distance that

can be traveled on the current tank of fuel.

Average fuel consumption display

This display shows the average fuel consump-

tion since it was last reset. The average fuel con-

sumption display can be set to either “AVE_ _._

km/L” or “AVE_ _._ L/100 km”, or “AVE_ _._

MPG” when using miles. To switch the fuel con-

sumption measurement units, push the “TRIP”

switch until the measurement units change.

• “AVE_ _._ km/L”: the average distance that

can be traveled on 1.0 L of fuel.

• “AVE_ _._ L/100 km”: the average amount of

fuel necessary to travel 100 km.

• “AVE_ _._ MPG”: the average distance that

can be traveled on 1.0 Imp.gal of fuel.

TIP

• To reset the display, change the display to the

average fuel consumption display, and while

the digits are flashing, push the “INFO” switch

until it is reset.

• After resetting, “_ _._” is shown until the vehicle

has traveled some distance.

1. Instantaneous fuel consumption display

1

1. Average fuel consumption display

1

FEATURES

1-5

Coolant temperature display

This display shows the coolant temperature from

40 C to 116 C in 1 C increments.

If the message “Hi” flashes, stop the vehicle,

then stop the engine, and let it cool.

TIP

• When the coolant temperature is below 40 C,

“Lo” will be displayed.

• The coolant temperature varies with changes

in the weather and engine load.

Air temperature display

This display shows the air temperature from –9

C to 99 C in 1 C increments. The temperature

displayed may vary from the actual ambient tem-

perature.

TIP

When the temperature is below –9 C, “Lo” will

be displayed.

Brightness control mode

The brightness level of the multi-function meter

unit panel can be adjusted.

To adjust the brightness

1. Turn the vehicle power off.

2. Push and hold the “INFO” switch.

3. Turn the vehicle power on and continue

pushing the “INFO” switch until the display

switches to the brightness control mode.

4. Push the “TRIP” switch to set the brightness

level.

5. Push the “INFO” switch to confirm the select-

ed brightness level and exit the brightness

control mode.

TIP

There are 4 brightness level settings.

1. Coolant temperature display

1. Air temperature display

1

1

1. Brightness level display

1

SPECIAL TOOLS

1-6

EAS20012

SPECIAL TOOLS

The following special tools are necessary for complete and accurate tune-up and assembly. Use only

the appropriate special tools as this will help prevent damage caused by the use of inappropriate tools

or improvised techniques. Special tools, part numbers or both may differ depending on the country.

When placing an order, refer to the list provided below to avoid any mistakes.

TIP

• For U.S.A. and Canada, use part number starting with “YM-”, “YU-”, or “ACC-”.

• For others, use part numbers starting with “90890-”.

Tool name/Tool No.

Illustration

Reference

pages

Yamaha diagnostic tool USB

90890-03267

3-4, 3-8, 3-11,

4-64, 4-66, 7-14,

7-14, 7-15, 8-37,

9-2, 9-28, 9-29

Yamaha diagnostic tool (A/I)

90890-03264

3-4, 3-8, 3-11,

4-64, 4-66, 7-14,

7-14, 7-15, 8-37,

9-2, 9-28, 9-29

Thickness gauge

90890-03268

Feeler gauge set

YU-26900-9

3-6, 4-25, 4-35,

5-58

Valve lapper (ø14)

90890-04101

Valve lapper (ø14)

YM-A8998

3-6

Vacuum gauge

90890-03094

Vacuummate

YU-44456

3-8

90890-04101

YM-A8998

YU-44456