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MZ · Overhead-cam four-stroke single, wet sump, gearbox shares engine oil, chain drive

SX 125

Library entry covers 2001-2009

40 factory 49 guideline

Published source

MZ 125 SX/SM Repair Manual (05/02), Inspection tables (printed pp.13-14, ManualsLib)

Factory service manual. Covers MZ 125 SX/SM repair manual, edition 05/02 (printed in the page footer); other years not checked.

89 items for a 2008 model, grouped by interval the way a factory chart is laid out.

How this bike is built (what the schedule is based on)

Engine cycle: Four-stroke
Engine lubrication: Wet sump (oil in crankcase)
Oil filtration: Replaceable cartridge or spin-on filter
Valve gear: Overhead cam, screw/locknut adjusters
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Fuel injection
Cooling: Air / oil cooled
Primary drive: Gear or chain inside engine, shares engine oil
Gearbox oil: Shares engine oil
Clutch control: Hand lever, cable
Final drive: Chain
Front suspension: Telescopic fork
Rear suspension: Swingarm, single shock / cantilever
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

2008 MZ SX 125

On the road: every 200 mi

1 item

Check engine oil level

Pre-ride / on the road

Guideline

Each fuel stop on old machines. Dry sump: check the tank hot, engine idling or just stopped, per your manual.

On the road: every 300 mi

3 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline
Lubricate drive chain

Pre-ride / on the road

Guideline

Lube warm, ideally at the end of the riding day so it soaks in overnight. Sooner after rain.

On the road: every 600 mi

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

Every 311 mi

2 items

Chain (clean and lubricate)

Final drive

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 500 km (or more often, depending on riding conditions). Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Chain slack and wheel tracking (check)

Final drive

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 500 km (or more often, depending on riding conditions). Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.

Every 621 mi

1 item

Oil level (check/add)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after every 1,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.

Every 1,000 mi or 6 months

1 item

Inspect tire tread, sidewalls and date codes

Wheels and tires

Guideline

Every 1,243 mi

1 item

Brake lining thickness (check)

Brakes

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 2,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.

Every 3,000 mi or 12 months

10 items

Check throttle cable(s) free play and return

Fuel and air

Guideline
Clean drive chain thoroughly (remove and soak, re-lube)

Final drive

Guideline

Non O-ring chains on old machines: remove, clean, soak in hot chain grease or lube, refit with the master link clip closed end leading.
Inspect chain and sprockets for wear (measure stretch)

Final drive

Guideline
Check steering head bearing adjustment

Front end

Guideline
Inspect fork seals, stanchions and fork boots

Front end

Guideline
Check footrests, pegs, rear brake and gear lever pivots

Rear suspension and frame

Guideline
Grease and check center / side stand and springs

Rear suspension and frame

Guideline
Check brake pads and discs

Brakes

Guideline
Check spoke tension and wheel true

Wheels and tires

Guideline
Check wheel bearings for play

Wheels and tires

Guideline

Every 3,728 mi or 12 months

22 items

Bolts, screws and hose clips (check tightness)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Braking efficiency (check)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Condensate collector under the intake (empty)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Coolant level, density and anti-freeze (check)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Engine mountings (check)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Engine oil (change); clean the coarse filter

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Exhaust pipe attachment to the cylinder (tighten)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Sliding surfaces and bearings (clean and lubricate)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Spark plugs (check, clean/replace)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Valve clearance (check/adjust)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Carburetor (clean)

Fuel and air

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Carburetor settings (check)

Fuel and air

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Fuel filter in the fuel cock (clean)

Fuel and air

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Accessible electrical contacts (check, treat with contact spray)

Ignition and electrics

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Clutch clearance (check/adjust)

Primary and gearbox

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Telescopic fork (check and service)

Front end

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Ball joint between shock absorber and swingarm (grease)

Rear suspension and frame

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Headlight adjustment (check; also after every shock preload adjustment)

Rear suspension and frame

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Side stand switch (check)

Rear suspension and frame

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): after 1,000 km, then every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Rear wheel drive damping (check)

Wheels and tires

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Wheel bearing clearance (check)

Wheels and tires

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Wheel rim eccentricity (check)

Wheels and tires

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km or 1x year, and at every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.

Every 3,728 mi

1 item

Air filter (clean)

Fuel and air

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6,000 km (or more often, depending on riding conditions). Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.

Every 4,000 mi or 12 months

2 items

Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline

Every 5,000 mi or 12 months

2 items

Change engine oil

Engine

Guideline

Pre-1970 machines: many owners run non-detergent or classic-spec oil with no filter, so short intervals matter. Dry sump: drain the tank and the crankcase/sump, flush the tank and clean the feed and return screens.
Replace oil filter

Engine

Guideline

Every 6,000 mi or 12 months

6 items

Clean / inspect air filter

Fuel and air

Guideline

Mesh or oiled foam: clean and re-oil. Paper: blow out or replace. Some very early machines have no filter at all.
Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Check swingarm bushes for play

Rear suspension and frame

Guideline
Inspect rear shocks for leaks and damping

Rear suspension and frame

Guideline
Lubricate control cables and lever pivots

Controls and cables

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Guideline

A dry speedo cable whips the needle and eventually kills the instrument.

Every 7,456 mi

2 items

Pick-up sensor air gap (check)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 12,000 km. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Air filter (replace)

Fuel and air

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 12,000 km (or more often, depending on riding conditions). Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.

Every 8,000 mi or 2 years

1 item

Check and adjust valve clearances

Engine

Guideline

Every 10,000 mi or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 12,000 mi or 2 years

4 items

Replace air filter element

Fuel and air

Guideline
Synchronize throttle bodies

Fuel and air

Guideline
Clean and grease rear suspension linkage

Rear suspension and frame

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 15,000 mi or 3 years

1 item

Change fork oil

Front end

Guideline

Some early telescopic forks are grease filled or use very small oil quantities. Check your manual.

Every 16,000 mi or 4 years

1 item

Replace spark plugs

Engine

Guideline

Every 18,000 mi

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 20,000 mi or 4 years

2 items

Repack / replace steering head bearings

Front end

Guideline

Many old machines use loose balls in cups and cones. Taper roller conversions are common.
Repack / replace wheel bearings

Wheels and tires

Guideline

Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Every 24,000 mi or 4 years

1 item

Replace fuel filter

Fuel and air

Guideline

Every 25,000 mi or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 30,000 mi or 6 years

1 item

Rebuild forks: seals, bushes, springs

Front end

Guideline

Every 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 12 months

4 items

Exhaust fume values (measure)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): annually. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Speedometer shaft (lubricate)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): 1x year (or more often, depending on riding conditions). Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Bowden cables (check and lubricate)

Controls and cables

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): 1x year (or more often, depending on riding conditions). Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Hand lever and throttle twist grip (lubricate)

Controls and cables

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): 1x year (or more often, depending on riding conditions). Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.

Every 2 years

6 items

Coolant (replace)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 2 years. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Fork oil (change)

Front end

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 2 years. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Brake fluid (change)

Brakes

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 2 years. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Replace brake fluid

Brakes

Guideline

Every 4 years

3 items

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.
Inspect brake hoses; replace old rubber

Brakes

Guideline
Rebuild calipers and master cylinders (seals)

Brakes

Guideline

Every 6 years

2 items

Replace inner tubes and rim tape with tires

Wheels and tires

Guideline
Replace tires on age (regardless of tread)

Wheels and tires

Guideline

No interval set

4 items

Lighting and signaling systems (check)

Engine

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): before every ride. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Brake fluid level (check)

Brakes

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): before every ride. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Tire air pressure and condition (check)

Wheels and tires

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): before every ride. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.
Battery electrolyte level and cable terminals (check)

Controls and cables

Factory

Factory: Inspection tables, engine and gearbox, chassis and electrics (repair manual printed pp.13-14, ManualsLib viewer pp.17-18): every 6 weeks. Columns as printed: after 1,000 km; every 6,000 km or 1x year; every 12,000 km; every 2 years.

Guideline lines: Intervals here are general guidelines for the machine's era and layout, compiled for this app. They are not factory manual figures. Check your workshop manual, and edit any interval in the bike's Schedule tab.