FZN250-A

FZF250-A

BC4-F8197-E1

SUPPLEMENTARY

FZN250-A

FZF250-A

SUPPLEMENTARY SERVICE MANUAL

©2019 by India Yamaha Motor Pvt. Ltd.

First edition, April 2019

All rights reserved.

Any reproduction or unauthorized use

without the written permission of

India Yamaha Motor Pvt. Ltd.

is expressly prohibited.

hicle unsafe and unfit for use.

a Motor Pvt. Ltd. is continually striving to improve all of its models. Modifications and

anges in specifications or procedures will be forwarded to all authorized Yamaha deal­

ppear in future editions of this manual where applicable.

specifications are subject to change without notice.

NT MANUAL INFORMATION

mportant 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.

G

n titles 2 appear in smaller print than the section title.

entify parts and clarify procedure steps, there are exploded diagrams “3” at the start of

val and disassembly section.

4” are given in the order of the jobs in the exploded diagram. A number indicates a dis­

step.

5” indicate parts to be lubricated or replaced. Refer to “SYMBOLS”.

uction chart “6” accompanies the exploded diagram, providing the order of jobs, names

otes in jobs, etc.

equiring more information (such as special tools and technical data) are described

ly.

1

7

2

DEFINTION

SYMBOL

DEFINTION

Serviceable with engine mounted

Molybdenum disulfide oil

Filling fluid

Brake fluid

Lubricant

Wheel bearing grease

Special tool

Lithium-soap-based grease

Tightening torque

Molybdenum disulfide grease

Wear limit, clearance

Silicone grease

Engine speed

Apply locking agent (LOCTITE®).

Electrical data

Replace the part with a new one.

Engine oil

M

BF

B

LS

M

S

LT

ECIFICATIONS

2

RIODIC CHECKS AND

JUSTMENTS

3

ASSIS

4

GINE

5

EL SYSTEM

6

ECTRICAL SYSTEM

7

OUTLINE OF THE ABS.............................................................................1-2

ABS COMPONENT FUNCTIONS .............................................................1-6

ABS OPERATION ...................................................................................1-11

ABS WARNING LIGHT AND OPERATION.............................................1-14

INDICATOR LIGHTS AND WARNING LIGHT ........................................1-16

MULTI-FUNCTION DISPLAY..................................................................1-16

ECIAL TOOLS ..........................................................................................1-19

1-1

eatures a compact and lightweight design to help maintain the basic maneuverability of

.

ulic unit assembly, which is the main component of the ABS, is centrally located on the

ncrease mass centralization.

coupler

noid fuse

or fuse

rol unit fuse

ning light

eel sensor rotor

eel sensor

unit assembly

9. Rear wheel sensor rotor

10. Rear wheel sensor

1-2

eatures a compact and lightweight design to help maintain the basic maneuverability of

.

ulic unit assembly, which is the main component of the ABS, is centrally located on the

ncrease mass centralization.

coupler

noid fuse

or fuse

rol unit fuse

ning light

eel sensor rotor

eel sensor

unit assembly

el sensor rotor

10. Rear wheel sensor

1-3

d:

speed of the front and rear wheels.

ed:

of the chassis.

akes are applied, wheel speed and chassis speed are reduced. However, the chassis

ard by its inertia even though the wheel speed is reduced.

pplied by braking to reduce the wheel speed.

that occurs when the rotation of one or both of the wheels has stopped, but the vehicle

travel.

n the tires which supports the vehicle when cornering.

akes are applied, slipping occurs between the tires and the road surface. This causes a

etween the wheel speed and the chassis speed.

he value that shows the rate of wheel slippage and is defined by the following formula.

Chassis speed – Wheel speed)/Chassis speed  100 (%)

s no slipping between the wheel and the road surface. The chassis speed is equal to the

d.

wheel speed is “0”, but the chassis is moving (i.e., wheel lock).

and vehicle stability

ke pressure is increased, wheel speed is reduced. Slipping occurs between the tire and

ce and brake force is generated. The limit of this brake force is determined by the friction

n the tire and the road surface and is closely related to wheel slippage. Wheel slippage is

by the slip ratio.

also closely related to wheel slippage. See figure “A”. If the brakes are applied while keep-

slip ratio, it is possible to obtain the maximum brake force without losing much side force.

ll use of the tires’ capabilities even on slippery road surfaces or less slippery road surfac-

e “B”.

b

c

d

(%)

a

e

f

g

B

d

(%)

orce between the tire

surface

ce

e

e. Less slippery road surface

f.

Controlling zone

g. Slippery road surface

1-4

p

p

p

,

the wheel has a tendency to lock.

rge and the wheel has a tendency to lock (point “A” in the following figure), the ABS ECU

ydraulic pressure in the brake caliper. Once the ABS ECU determines that the tendency

o lock has diminished after the hydraulic pressure is reduced, it increases the hydraulic

nt “B” in the following figure). The hydraulic pressure is initially increased quickly, and then

gradually.

on and vehicle control

rts operating, there is a tendency of the wheel to lock, and the vehicle is approaching the

. To make the rider aware of this condition, the ABS has been designed to generate a

pulsating action in the brake lever and brake pedal independently.

S is activated, a pulsating action may be felt at the brake lever or brake pedal, but this

cate a malfunction.

speed

eed

ce

rizing phase

ing phase

d

d

e

d

e

A

A

B

B

A

A

B

B

A

A

B

B

a

e

1-5

en in vehicles equipped with ABS, overturning of the vehicle cannot be prevented

suddenly.

ctions to prevent the tendency of the wheel to lock by controlling the hydraulic pressure.

ere is a tendency of the wheel to lock on a slippery road surface, due to engine braking,

not be able to prevent the wheel from locking.

G

ntrols only the tendency of the wheel to lock caused by applying the brakes. The

prevent wheel lock on slippery surfaces, such as ice, when it is caused by engine

n if the ABS is operating.

BS features

ABS (anti-lock brake system) has been developed with the most advanced electronic

trol is processed with good response under various vehicle travel conditions.

includes a highly developed self-diagnosis function. The ABS detects any problem con-

ws normal braking even if the ABS is not operating properly.

curs, the ABS warning light on the meter assembly comes on.

es the fault codes in the memory of the ABS ECU for easy problem identification and trou-

orce between the tire and road

ce

e

(%)

1-6

ONENT FUNCTIONS

ors and wheel sensor rotors

rs “1” detect the wheel speed and transmit the rotation signal to the ABS ECU.

ensor is composed of a permanent magnet and a hall IC. The sensor rotors “2” rotate with

he sensor rotors “2” have 40 slots and are installed close to the wheel sensors. As the

otates, the hall element in the hall IC installed in the wheel sensor generates pulses. The

cy, which is proportional to the wheel speed, is converted into a wave in the hall IC so that

ut.

U calculates the wheel rotation speed by detecting the pulse frequency.

4

4

7

7

5

6

6

8

9

9

10

11

12

13

14

ke master cylinder

unit assembly

ke master cylinder

noid valve

or

pump

enoid valve

U

9. Buffer chamber

10. Rear brake caliper

11. Rear wheel sensor

12. ABS warning light

13. Front brake caliper

14. Front wheel sensor