KYMCO K-XCT 125i User manual

K-XCT 125i
By KWANG YANG Motor Co., Ltd.
1st Edition, Aug. 2012
All rights reserved. Any reproduction or
unauthorized use without the written
permission of KWANG YANG Motor Co., Ltd.
is expressly prohibited.
T100-LKG5-A1

K-XCT 125i
PREFACE
This Service Manual describes the
technical features and servicing
procedures for the KYMCO
K-XCT 125i.
Section 1 contains the precautions for
all operations stated in this manual.
Read them carefully before any
operation is started.
Section 2 is the removal/installation
procedures for the frame covers
which are subject to
removal/installation frequency during
maintenance and servicing
operations.
Section 3 describes the inspection/
adjustment procedures, safety rules
and service information for each part,
starting from periodic maintenance.
Sections 5 to 11 give instructions for
disassembly, assembly and
adjustment of engine parts. Section
13-14 is the AFI system. Section 15 to
16 is the removal/ installation of
chassis. Section 17 to 20 states the
testing and measuring methods of
electrical equipment.
Most sections start with an assembly
or system illustration and
troubleshooting for the section. The
subsequent pages give detailed
procedures for the section.
KWANG YANG MOTOR CO., LTD.
QUALITY TECHNOLOGY DEPT.
EDUCATION SECTION
TABLE OF CONTENTS
GENERAL INFORMATION 1
EXHAUST MUFFLER/FRAME
COVERS 2
INSPECTION/ADJUSTMENT 3
LUBRICATION SYSTEM 4
ENGINE REMOVAL/INSTALLATION 5
CYLINDER HEAD/VALVES 6
CYLINDER/PISTON 7
DRIVE AND DRIVEN PULLEYS 8
FINAL REDUCTION 9
A.C. GENERATOR/STARTER
CLUTCH 10
CRANKCASE/CRANKSHAFT 11
COOLING SYSTEM 12
Fi DIAGNOSTIC TOOL OPERATION 13
FUEL INJECTION SYSTEM 14
HANDLEBAR/FRONT
WHEEL/FRONT BRAKE/FRONT
SHOCK ABSORBER/STEERING
STEM
15
REAR BRAKE/REAR FORK/REAR
WHEEL/REAR SHOCK ABSORBER` 16
BATTERY/CHARGING SYSTEM 17
IGNITION SYSTEM 18
STARTING SYSTEM 19
LIGHTS/METERS/SWITCHES 20
The information and contents
included in this manual may be
different from the motorcycle in case
specifications are changed.
CHASSIS ELE
C
TRI
C
AL
EQUIPMENT
ENGINE

1. GENERAL INFORMATION
1-0
K-XCT 125i
1
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
GENERAL INFORMATION
________________________________________________________________________________
SERIAL NUMBER------------------------------------------------------------------------------------1-1
SPECIFICATION -------------------------------------------------------------------------------------1-2
SERVICE PRECAUTIONS-------------------------------------------------------------------------1-3
TORQUE VALUES-----------------------------------------------------------------------------------1-8
SPECIAL TOOLS----------------------------------------------------------------------------------- 1-10
LUBRICATION POINTS -------------------------------------------------------------------------- 1-12
TROUBLESHOOTING ---------------------------------------------------------------------------- 1-14
1

1. GENERAL INFORMATION
1-1
K-XCT 125i
Identification Numbers Record

1. GENERAL INFORMATION
1-2
K-XCT 125i
SPECIFICATIONS
Name K-XCT 125i
Model No. SK25BA
Overall length 2120 mm
Overall width 785 mm
Overall height 1280 mm
Wheel base 1450 mm
Engine type 4strokeO.H.C.
Displacement 124.8 cc
Fuel Used 92# nonleaded
gasoline above
Curb weight
(kg)
Front wheel -
Rear wheel -
Total 157
Max. weight
capacity (kg)
Front wheel -
Rear wheel -
Total 247
Ground clearance (mm) 140
Braking distance (m) 7.9m / 40 km/hr
Min. turning radius (mm) 2450
Engine part
Starting system Starting motor
Type Gasoline 4-cycle
C
y
linder arran
g
ement Sin
g
le c
y
linde
r
Combustion chamber t
y
p
e
Semi-sphere
Valve arran
g
ement O.H.C.4V
Bore x stroke (mm) φ54 * 54.5
Compression ratio 11.2:1
Compression pressure
(
k
g
/c
m
²
)
15
Max. output (ps/rpm) 10.6
/
9000
Max. torque (k
g
-m/rpm) 12.0 / 7000
Intake Timing Open 8° BTDC
Close 31° BTDC
Exhaust
Timing Open 6° BTDC
Close 32° BTDC
Valve
clearance Intake 0.10
Exhaust 0.10
Idle speed (rpm) 1800±100 rp
m
Cooling Type Liquid coolin
g
Lubrication type Forced pressure &
wet sum
p
Oil pump t
y
pe Inner/outer roto
r
Oil filter t
y
pe Full-flow filtration
Oil capacit
y
1.2 lite
r
Exchan
g
in
g
capacit
y
1.0 lite
r
Fi in
j
ection s
y
stem
Air cleaner type & No Paper element, wet
Fuel capacity 10 liters
Brand Synerject
Throttle Body Butterfly type
Venturi diameter (mm) 27
Fuel pump pressure 3 bar
Electrical system
Ignition type ECU
Ignition timing 4°～32°
Spark plu
g
CR7E
Spark plu
g
g
ap 0.7m
m
Batter
y
Capacit
y
12V10AH
Transmission s
y
stem
Clutch t
y
pe Dry multi-disc
Transmission type CVT
Operation type Auto centrifugal
Reduction
g
ear t
y
pe Two-stage reduction
Reduction ratio 1st 0.83 ~ 2.2
2nd 10.41
Movin
g
device
Tire type Tubeless
Tire spec. Front wheel 120/70-14
Rear wheel 150/70-13
Tire pressure
(
k
g
/c
m
²
)
Front wheel 2.0
Rear wheel 2.25
Wheel material Aluminiu
m
Turning angle Left 40
Right 40
Brake type Front Disk brake
Rear Disk brake
Damping Device
Suspension
type
Front Telescope
Rear Swing arm
Shock absorber
stroke
Front 110 mm
Rear 93 mm