MZ 125 SX Operating instructions

RepairManual
MZ 125 SXJSM
Reproduced for
---"l-
MOTORRAO- UNO ZWEIRAOWERK GMBH
8080116ENG

-~
Foreword
This repair manual explains the mostimportantwork proceduresfor the main components of the MZ
125 SXlSM. Itis primarily oriented toward MZ service stations with qualified, trained personnel and
individuals with atechnical understanding
of the mechanical concepts and processes. All indications
and descriptions refer to amotorcycle as delivered by the factory. Work on accessories and their
mounting are not covered here. Repairs and maintenance work should only be performed with
sufficient knowledge and experience and not based on this manual alone.
We are not liable for damages due to:
unauthorized technical modifications
installation
of parts which are not original replacement parts or accessories
installation of accessories not intended for the specific model
improper repair work on MZ vehicles!
This repair manual contains various hazard warnings, important information and tips.
Please pay careful attention to this information to eliminate the risk
of injury during maintenance and
repair work. Incorrect maintenance
or repairs can endanger life and health or damage the vehicle.
Pleasealso notethat the hazard warnings, importantinformation and tips are notexhaustive. Itwould
be impossibleto warn against all possible hazards and consequenceswhich could result from failure
to follow these instructions.
We are constantly working on the further development of our vehicles. For this reason, we reserve
the
rightto makechanges in the interests oftechnical progress (equipment, shape, technology, etc.).
This repair manual is based on the most recent information available atthe time
of publishing. There-
fore, no claims may be derived from the information, figures and descriptions
in this repair manual.
The illustrations also do not necessarily perfectly depict the vehicle to
be repaired.
This repair manual is protected by copyright. Reprinting, reproduction or
translation, even
of excerpts, is not permitted without approval by MZ. MZ Motorrad- und Zweirad-
werk GmbH expressly retains all rights granted under copyright law.
©2002 Motorrad- und Zweiradwerk GmbH
PF 1170,
Alte Marienberger Straf),e 30 -35
D-09401 Zschopau-Hohndorf, Germany
Technical Customer Service
Telephone: [phone]
Fax: [phone]
e-mail: [email protected]
Internet: http://www.muz.de
MZ 125 SXlSM RepairManual 05/02

05/02
MZ 125SXlSM Repair Manual

1
1.1
1.2
1.3
1.4
15
2
2.1
2.2
2.3
2.4
2.5
2.5.1
2.5.2
3
3.1
3.2
3.3
3.4
3.4.1
3.4.2
3.4.3
3.5
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.5.6
3.6
3.6.1
3.6.2
3.6.3
3.6.4
3.7
3.8
3.9
3.9.1
3.9.2
3.9.3
3.10
3.10.1
3.10.2
3.10.3
3.10.4
3.10.5
3.10.6
3.10.7
3.10.8
3.10.9
3.10.10
3.10.11
Table of Contents
Table of Contents
Safety Regulations and Information 5
Important Information .. 5
Safety Regulations 6
Important Work Information..
.. 6
Important Maintenance Instructions . 6
Identification .... 7
Data Sheets 9
Technical Data 9
Inspection .. 13
Lubrication Points 15
Special Tools..... .. 16
Tightening torques.......... . 18
Chassis 18
Engine .20
Chassis 23
Seat .. 23
Locking Hoop
.... 24
Side Panelling .. 24
Fuel Tank .. 25
Filter Valve
.. 26
Tank Cap..............
.. 27
Fuel Filter 27
Lighting/Signal System.
.. 28
Headlight
.. 28
Tum Indicator Lights.....................................
.. 30
Headlight Casing
31
Adjusting the Headlight... .. 32
Tail Ligh!..........................
.. 32
Ignition Steering Lock.................
.. 33
Instruments........... .34
Speedometer and Lighting
34
Indication Lights .. 34
Reset Button.......... .. 35
Instrument Mount.... .. 35
Ignition Lock 36
Front Wheel Mud Guard 37
Rear Wheel Mud Guard 38
Rear Wheel Mud Guard
.. 38
Rear Reflector 38
Shock Absorber Protector 38
Handlebar 39
Mirror 39
Bowden cables
39
Throttle Twist Grip 40
Rubber Grips 40
Handlebar
41
Swingarm 42
Hand Brake Lever 42
Front Brake Light Switch 43
Clutch Lever 43
Switch/Mount 44
Starting Carburettor Lever 44
MZ 125 SXlSM Repair Manual 05/02 1

3.11
3.12
3.13
3.13.1
3.13.2
3.14
3.14.1
3.14.2
3.15
3.16
3.16.1
3.16.2
3.17
3.17.1
3.17.2
3.17.3
3.17.4
3.17.5
3.18
3.18.1
3.18.2
3.18.3
3.18.4
3.19
4
4.1
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
4.1.7
4.1.8
4.1.9
4.1.10
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.3
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3.6
4.3.7
4.3.8
4.3.9
4.3.10
4.3.11
4.3.12
4.3.13
4.4
4.4.1
4.4.2
4.4.3
Table of Contents
Air Filter .. .45
Shock Absorber
.. .46
Foot Rests
.. ..48
Rear Foot Rest .48
Front Foot Rest... .48
Side Stand........
.. ..49
Side Stand Switch 49
Side Stand
.. 50
Intake Muffler
51
Muffler.............................................. .. 52
Exhaust Mount Plate...
.. 53
Manifold .. 54
Cooiing System...... .. 55
Cooiant 55
Radiator Cap 56
Radiator Hoses .. 56
Radiator.......... .. 57
Thermostat.
58
Telescopic Fork 60
Fork Spars
61
Dismantling the Telescopic Fork 62
Fork Bridges..
.. 65
Steering Bearing
.. 66
Swing Fork 69
Brakes and Wheels 71
Brakes Front 71
Front Wheel Brake Adjustment... 72
Brake Fluid 73
Bleeding the Brake System .75
Main Brake Cyiinder . '" to
Inspection Window 7,7
Replacing the Seal SeL 77
Entire Brake Caliper 78
Brake Pads 79
Brake Caliper/Components 80
Brake Hose 81
Front Wheel............................................. . 82
Replacing the Front Wheel 83
Front Brake Disc 85
Wheel Bearing
86
Speedometer Drive 87
Rear Brake 88
Brake Fluid 89
Bleeding the Brake System 91
Storage Tank 92
Hose 92
Brake Hose 93
Adhesive Pads 94
Brake Caliper 94
Brake Caliper/Components 95
Brake Pads 96
Brake Lever 97
Rear Brake Light Switch 99
Main Brake Cylinder 100
Seal Set 100
RearWheel 1
01
Replacing the Rear WheeL 102
Chain Plate and Dog 1
04
Wheel Bearing 105
205/02 MZ 125 SXJSM Repair Manual

4.4.4
4.5
4.5.1
4.5.2
4.5.3
45.4
4.6
4.7
4.7.1
4.7.2
4.7.3
5
5.1
5.2
5.3
5.3.1
5.3.2
5.3.3
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
5.4.8
5.5
5.5.1
5.5.2
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
5.13.1
5.13.2
6
6.1
6.2
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.3
6.4
6.4.1
6.4.2
6.4.3
Table of Contents
Brake Disc 106
Chain .107
Chain Maintenance 107
Adjusting the Chain
Siack. .107
Chain Se!........................ .108
Replacing the Chain Slider 109
Tyres 110
Spoke Fitting
111
General Procedure. . . 111
Spoke Fitting Values for SX 111
Spoke Fitting Values for SM 112
Electrical Installation 113
General Principles 113
Fuses.................... .113
Battery 114
Checking the Electrolyte Level 114
Replacing the Battery 115
Charging the Battery .116
Ignition 117
Block Circuit Diagrams .117
Spark Plug............................ .118
Spark Plug Connector with Ignition Cable 119
Ignition Coil. 120
Ignition Box........................... .122
Ignition Box Inspection .123
Conversion
to the 80 km/h Varian!................ .124
Regulator/Rectifier............
.. 125
Alternator .127
Stator. .127
Rotor.......... .128
Flasher Relay 130
Starter Relay......................... .130
Shut-off Relay
131
Thermal Switch 132
Horn 133
Starter .134
Fan 135
Diodes .136
Position and function........ .136
Test Diodes 136
Engine 137
General Information 137
Inspection.... .137
Compression Pressure 137
Oil Level
.. .138
Oil Change 138
Oil Filter 140
Oil Return Plug .
141
Oil Pressure Sensor 141
Checking the Oil Pressure 142
Engine Removal.......................... .142
Clutch .144
Adjustment 144
Clutch Activation Lever. 145
Removing the Clutch 146
MZ 125 SXlSM Repair Manual
05/02 3

I.J.J .. .r j
6.4.4
6.5
6.5.1
6.5.2
6.6
6.6.1
6.6.2
6.6.3
6.7
6.7.1
6.7.2
6.7.3
6.7.4
6.7.5
6.8
6.8.1
6.8.2
6.9
6.9.1
6.9.2
6.9.3
6.9.4
6.9.5
6.9.6
6.10
6.10.1
6.10.2
6.10.3
6.10.4
6.11
6.12
6.12.1
6.12.2
6.12.3
6.12.4
7
Table of Contents
Installation 149
Gearshift....... .150
Selector Shaft 150
Free 'M1eel.
.. . 151
Pumps 152
Oil Pump........... .152
Water Pump...... .153
Oil Pressure Regulator.. .154
Cylinder Head 155
Removal 155
Valve Train 158
Timing Chain, Tension and Guide Rails 158
Chain 'M1eel, Camshaft......................................... .160
Installation
161
Valves.... .163
Valve Seat.
.. .165
Adjusting Valve Clearance 169
Cylinders
171
Removal......................................... . 171
Cylinder Dimensions.... .172
Piston................. .172
Piston Rings 174
Installation.......... .175
Intake Manifold 176
Transmission 177
Removal 177
Inspection .179
Crankshaft and Balance Shaft
181
Installation 182
Engine Installation and Adjustment 183
Carburettor...... .188
Settings 188
Removal 190
Dismantling and Inspecting
191
Installation 193
Index 197
405/02 MZ
125 SXlSM Repair Manual

!..Jjf1
Safety Regulations and Information
1Safety Regulations and Information
1.1 Important Information
Important information in this manual is designated as follows:
DANGER!
Immediate danger!
Failure to heed the warning may result
in serious injury or death.
Attention!
Dangerous situation!
Failure to heed the warning may result in injuries or property damage.
Note:
Useful supplemental information or user tips.
Environment!
Possible dangers for the environment and information on how to prevent them.
.ItiZl Tightening torque:
<ft Special tightening torques to be observed.
Every safety item explains: -which danger exists,
-what can happen,
-what you can do to prevent injuries.
Warning of hazards when handling
batteries Warning against corrosive liquids
AWarning against hazardous voltage
#c!,,':
Warning about flammable materials and
substances
Warnings about the risk
of crushing inju-
ries caused by the driving chain
Danger
of crushing
Warning about hot surfaces
AWarning aboutexplosive substances
MZ 125 SXlSM Repair Manual 05/02 5

u.:.tL1
1.2 Safety Regulations
Safety Regulations and Information
Attention!
Installation errors can endangerthe health or even the life of the vehicle operator and
other persons
in traffic.
For this reason, please observe all safety regulations and information when
performing work.
Work safely and with your full attention! Follow the procedures described in the manual!
Only operate engines in awell ventilated work area and for no longerthan necessary (health and environment!
Use only original replacement parts and accessories from MZ Motorrad- und Zweiradwerk GmbH!
Dispose
of brake fluid, fuel remains and oily rags according to the regulations!
Install the parts using the specified tightening torques!
When working
on the vehicle, secure it against tipping or rolling away!
Observe the BGR 157 safety rules
of the Professional Association of Vehicle Maintenance, WorkshopOrdinance
ZH1/525 and the general regulations as per BGVA1.
1.3 ImportantWork Information
Always de-energize the electrical installation (disconnect the batteries and/or remove the fuses) before starting
any repair on this installation.
•Label all removed parts as necessary in the order in which they were moved. This helps ensure that the parts
are returned to their original locations.
•When working
on the vehicle, protect painted surfaces and seats with a clean cloth or other suitable cover.
•Carefully inspect all parts before removal to determine the purpose ofthe repair.
Use special tools when specified.
When removing multiple screws or nuts, start with the middle or largest screw.
Tighten the screws in crosswise alternation in two or more steps.
1.4 lmpor+.ant Maintenance Instructions
The dealer is responsible for performing the following work in coordination with the vehicle owner to guarantee the
vehicle's operating safety and roadworthiness whenever inspections are made and/or during any unscheduled visit
to aworkshop.
•Replace the brake fluid and the gaskets ofthe brake cylinders and the brake calipers every 2years and after
every repair performed on the brake systems.
Replace the coolant every two years.
Replace the engine oil at the mandatory inspections
or at least once per year.
Replace the brake hoses in case
of damage or cracking or every 4years.
Replace rubber components, fuel and vent hoses in case
of damage or cracking or every 4years.
Replace cooling system hoses in case
of damage or cracking.
605/02 MZ 125
SXJSM Repair Manual

1.5 Identification
Fig.1: Location of the engine number (1)
MZ 125 SXlSM Repair Manual 05/02
Safety Regulations and Information
Fig.2: Location of the vehicle identification number (2)
7

805/02
Notes
MZ 125 SXlSM Repair Manual

u.:JL1
2Data Sheets
2.1 Technical Data
Technical Data
iiiiH',iii'·.···.······ ••... , ..ii:''.[ . ............ 1 MZ:1l'-b::i'" ...HHe ....... :.
' ... .,.. .. .,,,."' .. .,.
.,·.:';,!;i···i .• ·
k(/ 1"''''\'·.
.~:/
Overall length 2185
mm 2010 mm
Overall width with/without mirror/ 960/770 mm 9601770 mm
with hand protection 860
mm
860mm
\Mdth of handlebars 770mm 770mm
Height withlwithout mirror 1340/1220 mm 1280/1160 mm
Seat height
860mm
830mm
'Mleel base 1440 ±
15 mm 1440 ±15 mm
Caster 107 mm
73mm
Steering angle 63S
64.50
Steering angle left/right 400each 400each
Turning circle 3.5 m
3.5m
Ground clearance with max. permissible load 200/250 mm 170/220 mm
with/without base protection
Unladen weight (ready to ride) 127.5
kg 129.5 kg
Unladen front axle load 58.5 kg 60 kg
Unladen rear axle load 69 kg 69.5
Total weight permitted 320
kg
320 kg
_,ii·'·i;·'[·iiiic',ii'i.iii ••• iimiiii;, •••.•• , ••• ;".,. iiimiiiiii·ii'i;"';m;,.i'i;·.i .• i·ii;·iii"iii·,,;·iii·i:iii·ii;ii·iiiii;iii~
Engine type MZ 125
Method
of operation /control 4-stroke ignition engine, DOHC, 4valves operated with bucket tappets
Number
of cylinders 1, vertical, inclined 100forward
Cylinder capacity 124 cm3
Piston stroke 44.0 mm
Hole 60.0 mm
Output at rpm
11 kW/9000 rpm
Cooling method/operating pressure Liquid cooling, 1.4 bar
Nominal set value ofthe engine temperature Thermostat opening beginning 80 0 - 84 °C
regulator
Maximum torque at rpm 11.7 Nm
/8500 rpm
Compression ratio
11.2±1 :1
Camshafts
·Drive control chain 92 RH 2010
/122 chain links
·External diameter
of the camshaft at the 19.967 -19.980 mm
bearing
·Clearance between the bearing neck and 0.020 -0.040 mm
bearing cap
Tappet clearance
·Intake 0.09 -
0.11 mm
·Exhaust 0.12 -0.14 mm
MZ 125 SXlSM Repair Manual 05/02 9

Technical Data
,Engine
:7 ,.
ee-
"7
~.!,
:7
...••• ii!'.'!'·>
.····.n'
.•....
. .......
,.
Bucket tappet
·Bucket tappet outside diameter 24.967 -24.980 mm
·Bucket diameter in cylinder head 25.000 -25.021 mm
·Clearance 0,020 -0.040 mm
Lubrication wet sump lubrication
Clutch wet multi-plate clutch
Air Filter o900 dry paper filter
Manufacturer FILTRAK
I..;...."J .... ,
i~i-~. ······ii.!"
,'"
1':::ili.i;li;",iim'liiii'iniiii,',
.• ,............ ...... ················,,·,···'··'·:i·:',;!·:,,·
'T'7"
;;7";';; ;;.
i; ,. 'i'''c'''!''''
Manufacturer, identification, type MIKUNI
VM24
Main jet
100
Needlejet
0-0
Idling jet 15
Needle adjustment 5L10/4 th notch from top
Idle air adjusting screw 1 - 2.5 turn out
Idling speed 1800+
100
rpm
Fuel level 32 mm beyond the carburetor centre
Float height 20+1mm from sealing surface
of the carburetor casing
Exhaust gas setting max. 4.5Vol% CO
"'iiii·i.i·.·.'i";:i:····"i'iiiii:i,!
liiiiii:iiii,ii'iii,i"-~ii:.ii'iiiiii;·i::·i:i ,;;,;g:i;;iiii,ii'iii~';:.i·';'i:ii:·iiji'·i,·iiii:iii·iiii:::!
;.;;0"'"
Number of gears 6
Idling speed indicator
pilot lamp tiN"
Lubrication wet sump drip lubrication
Type
of transmission spur pinion-change (wheel) gear with dog-type lock shift
Operating system left foot centrols
Primary step-down gear system spur gears
Secendary step-down gear system Chain 1/2" x5/16", 134 links Chain 1/2" x5/16", 132 links
Ratios Variant MZ 125
8X Variant MZ 125 8M
Primary ratio 24/91 (1;3,792)
Seccndary ratio 16/52
(1 :3,25) 16/49 (1:3,063)
1st gear 12/35 1:35,942 1:33,868
2nd gear 16/30 1:23,105 1:21,772
3rd gear 17/24 1:17,397 1:16,393
4th gear 21/24 1:14,083 1:13,271
5th gear 23/22 1:11,787 1:11,107
6th gear 22/18 1:10,082 1:9,501
10 05/02
MZ 125 SXlSM Repair Manual

Technical Data
.. i, .••• '.·.·········
•i .• ·:' .. ,............; .:
.....
.·.·:i'::?;·ii.::.:ni:i·i·:.··!, •• i!.;i: •• ·q!:.i:.iii •• , .. :::i •• :: ••............ ..•• ;.··::;'..:.i .
Iii.'
i.··":···.,,·· •... ·
Type offrame tubular frame
Front suspension
·Design Telescopic fork
·Spring travel 220
mm
Rear suspension
·Design long swinging fork
·Spring travel/adjustment 220 mm/adjustable spring base
Steering bearing Deep groove ball bearing
Clutch lever and throttle twist grip
·Play in the clutch lever 3 - 5
mm at the end ofthe clutch
·Play in throttle Bowden cable 2 - 3 mm at the twist grip flange
Wheels - spoked wheels Variant MZ 125 8X Variant MZ 125 8M
Front tire 90/90 - 21 110170-17
Tire pressure 190 kPa/1,9 bar/28
psi
180 kPal1,8 bar/26 psi
Rim size
1.85x21
3.00 x17
Rim wobble limit vertical
0,5mm 0,5mm
side
0,5mm 0,5mm
Rear tire 120/80 - 18 130170-17
TIre pressure (value at perm. axle load) 200 (250) kPa/2 (2,5) bar/29 (36)
psi 230 (260) kPal2,3 (2,6) bar/33 (66)
psi
Rim size 2.50 x18 3.50 x17
Rim wobble limit
vertical 0,5mm
0,5mm
side 0,5mm 0,5mm
Front wheel brake
·Design hydraulic single-disc brake with atwo-piston floating caliper I
and manually operated cylinder
·Outside diameter xplate thickness
280x4mm
·Thickness ofthe brake pad 5,Omm
·Wear limit
<2,Omm
·
Main brake cylinder inside diameter
11 mm
·Brake caliper cylinder inside diameter
2x25,4 mm
·Brake fluid DOT 4
Rear
wheel brake
·Design hydraulic single-disc brake with atwo-piston floating caliper
and manuallyoperated cylinder
·Outside diameter xplate thickness
220x4mm
·Thickness
of the brake pad (wear limit) 5,Omm
·Wear limit
<2,Omm
·Main brake cylinder inside diameter
13mm
·Brake caliper cylinder inside diameter 2 x 25,4
mm
·Brake fluid DOT 4
Brake level and brake pedal
·Play in brake lever 2 - 5 mm atthe end
of the brake lever
·Position of brake pedal 25
mm under the footrest rubber surface
MZ 125 SX/$M Repair Manual 05/02
11

!.J,J.L 1Technical Data
··.1';11·
i!,I;"Cj','"il
11;11,1'"
, ... ,.,.
.
.,
• ··I·;'.·!II .
,.,.
"
. ......• ., .........
Nominal voltage 12V
Ignition oontract-free capacitor ignition (CDI)
Ignition unit
rpm limitation above 10,500 rpm
·Resistance
of the ignition ooil 324 ±32 Ohm at 23°C
·
Ignition unit Imanufacturer 16.754.126/1skra, AET
MZ 125 SX: 16.754.134/Iskra, AET (80 km/h variant)
MZ 125 SM: 16.754.127I1skra, AET (80 km/h variant)
Ignition coil:
·Model/manufacturer 16.725.102/Iskra, AET
·
Minimum sparking distance
6mm
·Resistance of the primary coil
0,790 ±15% at 20°C
·Resistance
of the seoondary coil 7,6
kO ±20% at 20°C
Ignition time point depends on rpm, stationary 6°, dynamically up to 34 ±2° before the
top dead centre (TDC)
80 km/h variant:
•Riding speed less than 2km/h ignition event at 6,700 rpm
·Riding speed more than 2km/h and less rpm limitation above 10,500 rpm
than 80 kmlh
·Riding speed more than 80 km/h
ignition events to reduce performance
Spark plug, air gap NGK CR8E, 0,7 mm
Alternator alternating current generator 180
Wat 5000 rpm
Battery 12V/9 Ah
High and low beam bulb
H4 12V-60/55W
Parking light 12V-5W
Direction indicators
12V-10W
Taillight 12V-21/5W
Speedometer illumination 12V-2W
Indication lights 12V-1,2W
Main fuse (light blue) 15A
Indicator fuse (violet)
3,OA
Fan fuse (brown) 7,5A
,.' •.. ,~
"J!'II!!"iCj!il"lli,111JI'I', !'il,·II'·i
o
,. 'I "!"Ii. Ilii.lll'''11'1111·;I',.·:,.,·,.,:.,'
•...•. , ..
••
Fuel type Super unleaded, min. ROZ 95
Fuel volume 12,51
Fuel reserve 3,61
Engine oil 1.2 I
SAE 15W-50 API SG/SH
1.2 I
SAE 15W-40 API SG/SH
Total ooolant volume 900-50 cm3
Telesoopic fork volume per spar 445 cm3
Oil type Fork oil SAE 7,5 -
10W
Shock absorber Hydro-pneumatic
(no maintenance can be performed by aoontraet workshop)
12
05/02
MZ 125 SXJSM Repair Manual

u:.t .. C1
Maximum speed
Fuel consumption
Method
of determination
2.2 Inspection
Inspection
110 km/h or 80 km/h (reduced performance version)
3.21/100km
Point-to-point fuel consumption
Check/adjust clutch clearance 144 • • •
Check/adjust valve clearance 169 •• •
Coolant •••Replacing
level/density/anti-freeze compound
Check oil level/add oil 138 after every 1,000
km
Oil change, clean the coarse filter •••
Tighten the exhaust pipe attachment to the • • •
cylinder
Check the engine mountings. •••
Clean the carburettor 192 •••
Check the carburettor settings •••
Measure the exhaust fume values annually
Check the brake fluid level
Change the brake fluid
Check the thickness ofthe brake linings
Grease the ball joint between the shock
absorber and the swingarm
Check and service the telescopic fork
Change the fork oil
Check the air pressure and condition ofthe
tires
Check thewheel rim eccentricity
Check the clearance
on the wheel bearings
Check the damping of the rear wheel drive
Clean the fuel filter
in the fuel cock
Clean the airfilter
MZ 125 SXlSM Repair Manual
73,89
before every ride •
every 2,000 km
• •
•••
before every ride
••
••
••
•••
45 every 6,000 km (or more often, depending on riding condi-
tions)
05/02 13

[kif j
Replace the airfilter
Inspection
every 12,000 km (or more often, depending on riding condi-
tions)
Empty the condensate collector under the
intake
Check that all bolts, screws and hose ciips are
tight •
•
•
•
•
Check the chain slack and wheel tracking
Clean and lubricate the chain
Lubricate the hand lever and throttle twist grip
Check and lubricate the bowden cables
Lubricate speedometer shaft
107
39
every 500 km (or more often, depending on riding condi-
tions)
every 500 km (or more often, depending on riding condi-
tions)
1 x year (or more often, depending on riding conditions)
1 x year (or more often, depending on riding conditions)
1 x year (or more often, depending on riding conditions)
Clean and lubricate all sliding surfaces and
bearings
Check the side stand switch •
•
•
•
•
Check the lighting and signaling systems before every ride
Check
the headlight adjustment
32
• • •
(also after every adjustment of the spring
preload
of the shock absorber)
Check all accessible contacts, treatwith con- ••
tact spray
Spark plugs: check, c1eanlreplace
118
• • •
Check the air gap of the pick-up sensor 129 •
Check the electrolyte level in the battery and 114 every 6weeks
the cable terminals
14
05/02
MZ 125 SXlSM RepairManual

!.J:.tX1
2.3 Lubrication Points
Lubrication Points
6
13
456
13
7 8 9
10
11 12
1Clutch Lever Oil
2Bowden cables Oil
3Steering bearing roller bearing grease
4Side stand bearing roller bearing grease
5Chain chain spray for
a-ring chains
6
VVheel Bearing
roller bearing grease
7Ball joint on the shock-absorbing leg, bottom Grease
or spray (MoS2)
8Brake pedal roller bearing grease
9Throttle twist grip roller bearing grease
10 Hand brake lever roller bearing greaseIoil
11 Speedometer drive Oil
12 Speedometer drive in the front wheel
roller bearing grease
13 Brake caliper sliding pin grease MoS2
MZ 125 SXlSM Repair Manual 05/02 15

2.4 Special Tools
The term "special tool" is abbreviated in the text as "ST".
Special Tools
2
3
4
5
6
8999200000
8999201000
8999202000
8999203000
8999204000
8999205000
Locking bolt,
Crankshaft
Sleeve for
Valve shaft seal
Piston installation plate
Pick-up
adjusting tool
Locking tool
Clutch
Alternator rotor
removal tool
~-------E-
16 05/02 MZ 125 SXlSM Repair Manual