Yamaha Fascino S 2021 Manual

2021
SUPPLEMENTARY
SERVICE MANUAL
LCX125D
LCX125
B7J-F8197-E1
B7JF8197E1.book Page 1 Tuesday, June 29, 2021 2:28 PM

FORWARD
This supplementary service manual has been prepared to introduce new service and data for the
Fascino S (LCX125D) and Fascino (LCX125) 2021. For complete information procedures it is
necessary to use this supplementary service manual together with the following manual.
FASCINO (LCX125) 2020 SERVICE MANUAL: B7J-F8197-E0
Fascino S (LCX125D) and Fascino (LCX125) 2021
SUPPLEMENTARY SERVICE MANUAL
©2021 by India Yamaha Motor Pvt. Ltd.
First edition, June 2021
All rights reserved.
Any reproduction or unauthorized use
without the written permission of
India Yamaha Motor Pvt. Ltd.
is expressly prohibited.
B7JF8197E1.book Page 1 Tuesday, June 29, 2021 2:28 PM

TABLE OF CONTENTS
GENERAL INFORMATION 1
SPECIFICATIONS 2
CHASSIS 3
ENGINE 4
FUEL SYSTEM 5
ELECTRICAL SYSTEM 6
B7JF8197E1.book Page 1 Tuesday, June 29, 2021 2:28 PM

B7JF8197E1.book Page 2 Tuesday, June 29, 2021 2:28 PM

1
GENERAL INFORMATION
FEATURES..................................................................................................... 1-1
INDICATOR LIGHTS AND WARNING LIGHTS....................................... 1-1
MULTI-FUNCTION METER UNIT ............................................................ 1-1
HANDLEBAR SWITCHES........................................................................ 1-2
SPECIAL TOOLS ........................................................................................... 1-4
B7JF8197E1.book Page 0 Tuesday, June 29, 2021 2:28 PM

FEATURES
1-1
GEN
INFO
EAS00019
FEATURES
EAU4939R
INDICATOR LIGHTS AND WARNING LIGHTS
EAU11033
Turn signal indicator lights “ ” and “ ”
Each indicator light will flash when its corre-
sponding turn signal lights flash.
EAU11081
High beam indicator light “ ”
This indicator light comes on when the high
beam of the headlight is switched on.
EAUN0711
Eco indicator light “ECO”
This indicator light comes on when the vehicle is
being operated in an environmentally friendly,
fuel-efficient manner. The indicator light goes off
when the vehicle is stopped.
TIP
Consider the following tips to reduce fuel con-
sumption:
• Avoid high engine speeds during accelera-
tion.
• Travel at a constant speed.
EAU42778
Engine trouble warning light “ ”
This warning light comes on if a problem is de-
tected in the electrical circuit monitoring the en-
gine. If this occurs, have a Yamaha dealer check
the self-diagnostic system.
The electrical circuit of the warning light can be
checked by turning the vehicle on. The warning
light should come on for a few seconds, and
then go off.
If the warning light does not come on initially
when the vehicle is turned on, or if the warning
light remains on, have a Yamaha dealer check
the electrical circuit.
EAU76382
Stop and Start System indicator light “ ”
This indicator light comes on when the Stop and
Start System activates. The indicator light will
flash when the engine is automatically stopped
by the Stop and Start System.
TIP
Even if the Stop and Start Switch is set to “ ”,
this indicator light may not come on.
EAUE4570
Acceleration assist indicator light “ASST”
This vehicle is equipped with a Smart Motor
Generator (SMG) that not only starts the engine,
but also works in hybrid function to assist with
initial acceleration.
This indicator light comes on when the smart
motor generator is assisting with acceleration.
The indicator light goes off when the vehicle is
stopped.
TIP
When battery voltage is low, the smart motor
generator may not assist with acceleration.
EAU86813
MULTI-FUNCTION METER UNIT
1. Stop and Start System indicator light “ ”
2. High beam indicator light “ ”
3. Left turn signal indicator light “ ”
4. Eco indicator light “ECO”
5. Right turn signal indicator light “ ”
6. Acceleration assist indicator light “ASST”
7. Engine trouble warning light “ ”
ZAUE4408
1234567
ASST
A
1. Speedometer
2. Multi-function display
3. Fuel meter
4. “SELECT” button
A
A
ZAUE4421
1
4
2
3
ASS TASS T
B7JF8197E1.book Page 1 Tuesday, June 29, 2021 2:28 PM

FEATURES
1-2
GEN
INFO
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.
EAU86831
Speedometer
The speedometer shows the vehicle’s traveling
speed.
EAUE4590
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 the last segment
of the fuel meter “ ” starts flashing, refuel as
soon as possible.
TIP
If the last segment continues to flash after fuel-
ing, or if all segments are flashing, have a
Yamaha dealer check the electrical system.
EAUE4600
Multi-function display
The multi-function display is equipped with the
following:
• an odometer (ODO)
• a tripmeter (TRIP)
Push the “SELECT” button to change the display
in the following order:
ODO TRIP ODO
EAU86890
Odometer
The odometer shows the total distance traveled
by the vehicle.
TIP
The odometer will lock at 999999 and cannot be
reset.
EAUE4611
Tripmeter
The tripmeter shows the distance traveled since
it was last reset.
To reset a tripmeter, change the display to the
tripmeter and then push the “SELECT” button
until it is reset.
TIP
The tripmeter will reset and continue counting
after 999.9 is reached.
EAU1234R
HANDLEBAR SWITCHES
Left
Right
EAU54203
Dimmer/Pass switch “ / /PASS”
Set this switch to “ ” for the high beam and to
“ ” for the low beam.
To flash the high beam, push the switch down
towards “PASS” while the headlights are on low
beam.
EAUE4381
Headlight switch “ / ”
This model is equipped with a headlight and a
daytime running light (DRL).
Switch to “ ” to turn on the headlight.
When the headlight is turned on, the DRL is
dimmed to auxiliary mode.
Switch to “ ” to turn off the headlight and DRL
will come on to help maintain daylight visibility.
1. Dimmer/Pass switch “ / /PASS”
2. Turn signal switch “ / ”
3. Horn switch “ ”
1. Stop and Start System switch “ / ”
2. Headlight switch “ / ”
3. Start switch “ ”
PASS
PASS
ZAUE4410
A
A
3
ZAUE4411
AA
B7JF8197E1.book Page 2 Tuesday, June 29, 2021 2:28 PM

FEATURES
1-3
GEN
INFO
TIP
The lights will come on when the engine is start-
ed and remain on until the key is set to “ ”.
EAU12461
Turn signal switch “ / ”
To signal a right-hand turn, push this switch to
“ ”. To signal a left-hand turn, push this switch
to “ ”. When released, the switch returns to the
center position. To cancel the turn signal lights,
push the switch in after it has returned to the
center position.
EAU12501
Horn switch “ ”
Press this switch to sound the horn.
EAUM1133
Start switch “ ”
Push this switch while applying the front or rear
brake to crank the engine with the starter.
EAU76391
Stop and Start System switch “ / ”
To turn on the Stop and Start System, set the
switch to “ ”. To turn off the Stop and Start Sys-
tem, set this switch to “ ”.
A
A
A
A
B7JF8197E1.book Page 3 Tuesday, June 29, 2021 2:28 PM

SPECIAL TOOLS
1-4
GEN
INFO
EAS00027
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.
Tool name/Tool No. Illustration
Clutch spring compressor
S 1101
(90890-01337)
This tool is used for disassembly and assembly the
secondary sheave.
Clutch carrier nut-socket (ø39 mm)
S 1102
(90890-01493)
This tool is used to loosen and tighten the clutch
carrier locknut of the secondary sheave.
Steering nut socket
S 1103
(90890-01403)
This tool is used to loosen and tighten the steering
ring nut.
Clutch housing holder
S 1104
(90890-01701)
This tool is used to hold the clutch housing while
loosening and tightening clutch housing nut.
Cam sprocket holder
S 1105
(90890-04143)
This tool is used for removing or installing the cam-
shaft sprocket.
Spark plug spanner
S 1106
This tool is used for removing or installing the spark
plug.
Kick spring installer
S 1107
This tool is used for installing the kickstarter spring
torsion.
39 mm
Ø30
70 mm
16 mm
50 mm
B7JF8197E1.book Page 4 Tuesday, June 29, 2021 2:28 PM

SPECIAL TOOLS
1-5
GEN
INFO
Steering C-spanner
S 1108
(90890-01268)
This tool is used to loosen and tighten the steering
ring nut.
Magneto puller
S 1109
(90890-01189)
This tool is used to remove the AC magneto rotor
with the help of magneto holder.
Rotor holder tool
S 1113
(90890-01235)
This tool is used to hold the AC magneto rotor
when removing or installing the AC magneto rotor
nut.
Adapter for valve spring compressor
S 1114
(90890-04108)
This adapter is an attachment of YSST-603. This
tool is used when removing or installing the valve
and the valve spring.
Engine stand
S 1117
Bolt & Bush for engine stand
S 1117A
This tool is used to hold the engine.
Funnel with long tail
S 1119
This funnel is used to fill engine oil in crankcase.
Crankshaft installer
S 1120
Crankshaft installer attachment
S 1120A
These tools are used for installing the crankshaft.
Tool name/Tool No. Illustration
R30
20 mm
Ø20.5
S1117 S1117A
M10
70 mm
45.5 mm
M12 x P1.5
46 mm
S1120 S1120A
B7JF8197E1.book Page 5 Tuesday, June 29, 2021 2:28 PM

SPECIAL TOOLS
1-6
GEN
INFO
Lower bearing inner race installer
S 1170
This tool is used to install the bearings.
Bearing punch with pilot driver (ø8mm)
YSST-951
S 1122
This tool is used to install the bearings.
Piston pin replacer
YSST-207A
(90890-01304)
This tool is used to replace the piston pin.
Crankcase splitting
YSST-265
(90890-01135)
Crankshaft separator attachment 6 mm
YSST-265A
(90890-04152)
This tool is necessary for separating the crank-
case.
Oil seal remover
YSST-270
To remove oil seal.
TFF oil seal installation tool
YSST-275
(90890-01367)
(90890-01400)
Front fork oil seal installer attachment
YSST-275A
(90890-01186)
To install oil seal in outer tube.
Valve spring compressor
YSST-603
(90890-04019)
This tool is used when removing or installing the
valve, valve spring, and cotter.
Tool name/Tool No. Illustration
Ø30X40.5XØ48
Ø48
Ø30
S1170
7.812.8
YSST-265
M6
YSST-265A
M8 M8
Ø9.5 M6
YSST-275 YSST-275A
Ø27
B7JF8197E1.book Page 6 Tuesday, June 29, 2021 2:28 PM

SPECIAL TOOLS
1-7
GEN
INFO
Piston base
YSST-604
(90890-01067)
This tool is used to support the piston.
Small screw driver
YSST-609
This tool is used to adjust throttle screw/retract tim-
ing chain tensioner.
Scraper
YSST-612
This tool is used to scrap the sealant from crank-
case surface.
Cup-A
YSST-620-A
This tool is used to remove the bearings of primary
driven gear.
Cup-B
YSST-620-B
This tool is used to remove the bearings of front
wheel (LH & RH).
Cup- C
YSST-620-C
This tool is used to remove the bearing of main ax-
le/ V-belt case cover / drive axle (LH) crankcase.
Cup- D
YSST-620-D
This tool is used to remove the bearing of cam-
shaft.
Bearing puller 6001 & 6201
YSST-623
This tool is used to remove the bearing of cam-
shaft, main axle & primary driven gear.
Tool name/Tool No. Illustration
B7JF8197E1.book Page 7 Tuesday, June 29, 2021 2:28 PM

SPECIAL TOOLS
1-8
GEN
INFO
Bearing puller 6202
YSST-624
This tool is used to remove the bearings of
main axle (transmission cover).
Bearing puller 6203
YSST-624 A
This tool is used to remove the bearing of drive axle
(left crankcase).
Upper and lower race installer
YSST-626
This tool is used to install upper and lower races.
Tappet screw holder
YSST-706
(90890-04154)
This tool is used to adjust valve clearance.
Tappet screw socket
YSST-706 A
This tool is used to adjust valve clearance.
Bearing puller
YSST-723
This tool is used to remove the bearing 6202 of the
V-belt case cover and front wheel.
Wooden plunk
YSST-892
This tool is used to stand the scooter at center.
Bush
YSST-893
This tool is used as an attachment with crankshaft
remover.
Tool name/Tool No. Illustration
M20
300
3sq
Hex 8
Ø10
ODØ18
IDØ12
B7JF8197E1.book Page 8 Tuesday, June 29, 2021 2:28 PM

SPECIAL TOOLS
1-9
GEN
INFO
Multimeter
INS-003
(90890-03189)
This instrument is necessary for checking the elec-
trical system.
Ignition checker
INS-007
(90890-06754)
This tool is used to check efficiency of ignition at
spark plug.
Compression gauge
INS-009
(90890-03081)
This instrument is used to measure the engine
compression.
Yamaha bond No.1215
TG-1215
(90890-85505)
This bond is used to seal two mating surfaces (e.g.,
crankcase mating surfaces).
Yamaha diagnostic tool
INS-018
(90890-03267)
This tool is used to diagnose electrical fault in ad-
vance fuel injection system.
Yamaha diagnostic tool (Ver.3)
INS-019
(90890-03264)
This tool is used to diagnose electrical fault in ad-
vance fuel injection system.
Sub harness 3
(90890-03266)
This tool is used to connect FI YDT coupler to
adapter interface (BS-VI models).
Fuel injector plate
INS-020
This tool is used to hold the fuel infector on injector
cleaning machine.
Tool name/Tool No. Illustration
YDT
16 mm
58 ± 0.10 mm
B7JF8197E1.book Page 9 Tuesday, June 29, 2021 2:28 PM

2
SPECIFICATIONS
GENERAL SPECIFICATIONS ....................................................................... 2-1
MAINTENANCE SPECIFICATIONS (ENGINE) ............................................. 2-2
CHASSIS SPECIFICATIONS ......................................................................... 2-5
ELECTRICAL SPECIFICATIONS .................................................................. 2-7
TIGHTENING TORQUES ............................................................................... 2-9
GENERAL TIGHTENING TORQUE SPECIFICATIONS.......................... 2-9
ENGINE TIGHTENING TORQUES........................................................ 2-10
CHASSIS TIGHTENING TORQUES...................................................... 2-12
LUBRICATION POINTS AND LUBRICANT TYPES ................................... 2-15
ENGINE.................................................................................................. 2-15
CHASSIS................................................................................................ 2-16
B7JF8197E1.book Page 0 Tuesday, June 29, 2021 2:28 PM

GENERAL SPECIFICATIONS
2-1
SPEC
GENERAL SPECIFICATIONS
Model
Model LCX125D:- B7J5 (Disc), B7JM (Disc)
LCX125:- B7JK (Disc), B7JN (Disc),
B7JL (Drum), B7JP (Drum)
Dimensions
Overall length 1920 mm (75.6 in)
Overall width 685 mm (27.0 in)
Overall height 1150 mm (45.3 in)
Wheelbase 1280 mm (50.4 in)
Ground clearance 145 mm (5.71 in)
Weight
Curb weight 99 kg (218 lb)
Riding capacity 2 person
Maximum load 156 kg (344 lb)
Hook maximum load 1.0 kg (2 lb)
B7JF8197E1.book Page 1 Tuesday, June 29, 2021 2:28 PM

MAINTENANCE SPECIFICATIONS (ENGINE)
2-2
SPEC
MAINTENANCE SPECIFICATIONS (ENGINE)
Engine
Combustion cycle 4-stroke
Cooling system Air cooled
Valve train SOHC
Displacement 125 cm³
Number of cylinders Single cylinder
Bore stroke 52.4 57.9 mm (2.06 2.28 in)
Compression ratio 10.2 : 1
Compression pressure 1522–1960 kPa/870 r/min (15.2–19.6 kgf/cm²/
870 r/min, 216.5–278.8 psi/870 r/min)
Starting system Electric starter and kickstarter
Fuel
Recommended fuel Unleaded gasoline (E10 acceptable)
Fuel tank capacity 5.2 L (1.4 US gal, 1.1 Imp.gal)
Engine oil
Recommended brand YAMALUBE
SAE viscosity grades 10W-40
Recommended engine oil grade API service SL type, JASO standard MB
Lubrication system Wet sump
Engine oil quantity
Oil change 0.80 L (0.85 US qt, 0.70 Imp.qt)
Quantity (disassembled) 0.84 L (0.89 US qt, 0.74 Imp.qt)
Oil filter
Oil filter type Centrifugal
Final transmission oil
Recommended brand/type YAMALUBE/Scooter gear oil
Quantity (disassembled) 0.11 L (0.12 US qt, 0.10 Imp.qt)
Quantity 0.10 L (0.11 US qt, 0.09 Imp.qt)
Spark plug(s)
Manufacturer/model NGK/CR6HSA
Spark plug gap 0.6–0.7 mm (0.024–0.028 in)
Cylinder head
Warpage limit 0.05 mm (0.0020 in)
Camshaft
Camshaft lobe dimensions
Lobe height limit (intake) 32.590 mm (1.2831 in)
Lobe height limit (exhaust) 31.948 mm (1.2578 in)
Rocker arm/rocker arm shaft
Rocker arm inside diameter limit 10.015 mm (0.3943 in)
Rocker arm shaft outside diameter limit 9.935 mm (0.3911 in)
B7JF8197E1.book Page 2 Tuesday, June 29, 2021 2:28 PM

MAINTENANCE SPECIFICATIONS (ENGINE)
2-3
SPEC
Valve, valve seat, valve guide
Valve clearance (cold)
Intake 0.06–0.10 mm (0.0024–0.0039 in)
Exhaust 0.22–0.26 mm (0.0087–0.0102 in)
Valve dimensions
Valve seat contact width limit (intake) 1.4 mm (0.06 in)
Valve seat contact width limit (exhaust) 1.7 mm (0.07 in)
Valve stem diameter limit (intake) 4.945 mm (0.1947 in)
Valve stem diameter limit (exhaust) 4.930 mm (0.1941 in)
Valve guide inside diameter (intake) 5.000–5.012 mm (0.1969–0.1973 in)
Valve guide inside diameter (exhaust) 5.000–5.012 mm (0.1969–0.1973 in)
Valve-stem-to-valve-guide clearance limit
(intake) 0.080 mm (0.0032 in)
Valve-stem-to-valve-guide clearance limit
(exhaust) 0.100 mm (0.0039 in)
Valve stem runout 0.020 mm (0.0008 in)
Valve spring
Free length limit (intake) 35.30 mm (1.39 in)
Free length limit (exhaust) 35.30 mm (1.39 in)
Cylinder
Bore 52.400–52.423 mm (2.0630–2.0639 in)
Wear limit 52.473 mm (2.0659 in)
Piston
Diameter 52.377–52.400 mm (2.0621–2.0630 in)
Measuring point (from piston skirt bottom) 5.0 mm (0.20 in)
Piston-to-cylinder clearance 0.016–0.030 mm (0.0006–0.0012 in)
Piston pin bore inside diameter limit 13.043 mm (0.5135 in)
Piston pin outside diameter limit 12.976 mm (0.5109 in)
Piston ring
Top ring
End gap limit 0.42 mm (0.0165 in)
Side clearance limit 0.120 mm (0.0047 in)
2nd ring
End gap limit 0.67 mm (0.0264 in)
Side clearance limit 0.120 mm (0.0047 in)
Crankshaft
Crank assembly width 43.95–44.00 mm (1.730–1.732 in)
Runout limit 0.030 mm (0.0012 in)
Clutch
Clutch type Dry, centrifugal, shoe
B7JF8197E1.book Page 3 Tuesday, June 29, 2021 2:28 PM

MAINTENANCE SPECIFICATIONS (ENGINE)
2-4
SPEC
Automatic centrifugal clutch
Clutch shoe thickness limit 2.1 mm (0.08 in)
Clutch housing inside diameter limit 125.5 mm (4.94 in)
Clutch-in revolution 2200–2600 r/min
Clutch-stall revolution 4200–4800 r/min
V-belt
V-belt width limit 19.0 mm (0.75 in)
Drivetrain
Primary reduction ratio 1
Transmission type V-belt automatic
Transmission ratio 2.192–0.740 : 1
Secondary reduction ratio 9.559 (50/17 39/12)
Weight outside diameter limit 19.5 mm (0.77 in)
Compression spring free length limit 140.4 mm (5.53 in)
Air filter
Air filter element Oil-coated paper element
V-belt filter element Wet element
Fuel injector
Resistance 12.0 
Idling condition
Engine idling speed 1200–1400 r/min
O2feedback control Active
Engine temperature 75–85 °C (167–185 °F)
CO% 0.0–0.5 %
Exhaust gas sampling point Muffler tail pipe
Fuel line pressure (at idle) 300–390 kPa (3.0–3.9 kgf/cm², 43.5–56.6 psi)
Throttle grip free play 3.0–7.0 mm (0.12–0.28 in)
B7JF8197E1.book Page 4 Tuesday, June 29, 2021 2:28 PM

CHASSIS SPECIFICATIONS
2-5
SPEC
CHASSIS SPECIFICATIONS
Chassis
Frame type Underbone
Caster angle 26.4 °
Trail 91 mm (3.6 in)
Front wheel
Wheel type Cast wheel
Rim size J12 1.85
Radial wheel runout limit 2.0 mm (0.08 in)
Lateral wheel runout limit 0.5 mm (0.02 in)
Wheel axle bending limit 0.25 mm (0.01 in)
Rear wheel
Wheel type Cast wheel
Rim size J10 2.15
Radial wheel runout limit 2.0 mm (0.08 in)
Lateral wheel runout limit 0.5 mm (0.02 in)
Wheel axle bending limit 0.25 mm (0.01 in)
Front tire
Type Tubeless
Size 90/90–12
Manufacturer/model MAXXIS/M6307
Manufacturer/model TVS/CONTA775F
Rear tire
Type Tubeless
Size 110/90–10
Manufacturer/model MAXXIS/M6220
Manufacturer/model TVS/CONTA775R
Tire air pressure (measured on cold tires)
1 person
Front 150 kPa (1.50 kgf/cm², 22 psi, 1.50 bar)
Rear 200 kPa (2.00 kgf/cm², 29 psi, 2.00 bar)
2 persons
Front 150 kPa (1.50 kgf/cm², 22 psi, 1.50 bar)
Rear 200 kPa (2.00 kgf/cm², 29 psi, 2.00 bar)
Brake
Type Unified brake system
Operation Activated by rear brake
Front brake (Drum)
Front brake lever free play 10.0–20.0 mm (0.39–0.79 in)
Brake drum inside diameter limit 131.0 mm (5.16 in)
Lining thickness limit 2.0 mm (0.08 in)
Brake cable UBS free play 0.1–1 mm
B7JF8197E1.book Page 5 Tuesday, June 29, 2021 2:28 PM