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CZ · Two-stroke single, premix, chain drive

125

Library entry covers 1974-2001

15 factory 50 guideline

Published source

CZ Sport 125 type 488.3 Workshop Manual, III.2 Lubrication chart printed p.12 (viewer p.13)

Factory service manual. Covers CZ Sport 125 type 488.3 Workshop Manual (ManualsLib 1015587), lubrication chart only; the catalog CZ 125 row spans 1974-2001 and several types, the 488.3 match to the whole row is not confirmed.

65 items for a 1994 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
Two-stroke
Engine lubrication
Two-stroke premix (oil in fuel)
Oil filtration
None (no filter)
Valve gear
None (two-stroke porting)
Ignition
Magneto (incl. magdyno, flywheel magneto)
Charging
Alternator / stator with rectifier
Battery
Wet cell (flooded lead-acid, needs topping up)
Fuel system
Single carburetor
Cooling
Air / oil cooled
Primary drive
Gear or chain inside engine, shares engine oil
Gearbox oil
Separate gearbox oil
Clutch control
Hand lever, cable
Final drive
Chain
Front suspension
Telescopic fork
Rear suspension
Swingarm, twin shocks
Front brake
Drum (or band / stirrup)
Rear brake
Drum (or band / belt rim)
Wheels
Spoked, tubed
Sidecar
No sidecar
Maintenance schedule

1994 CZ 125

On the road: every 150 mi

1 item
  • Check two-stroke oil tank / carry premix oil
    Pre-ride / on the road
    Guideline

    Running a two-stroke out of oil seizes it. Injection bikes: check the tank. Premix: carry oil and a measure.

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 1,000 mi or 1 month

1 item
  • Check battery electrolyte, top up with distilled water
    Ignition and electrics
    Guideline

    Wet-cell batteries on old machines need regular topping up, more in hot weather.

Every 1,000 mi or 6 months

3 items
  • Adjust front drum brake
    Brakes
    Guideline
  • Adjust rear drum brake and rod / cable linkage
    Brakes
    Guideline
  • Inspect tire tread, sidewalls and date codes
    Wheels and tires
    Guideline

Every 1,800 mi

6 items
  • Breaker arm pin (oil M2T)
    Engine
    Factory

    Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 3000 km (1,800 mls)

  • Breaker felt lip (oil M2T)
    Engine
    Factory

    Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 3000 km (1,800 mls)

  • Speedometer drive (oil M2T)
    Engine
    Factory

    Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 3000 km (1,800 mls)

  • Check throttle cable(s) free play and return
    Fuel and air
    Factory

    Manual: Twist-grip (grease A00 and oil M2T). Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 3000 km (1,800 mls)

  • Gearbox oil change (PP7 SAE 80)
    Primary and gearbox
    Factory

    Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed after 500 km covered, at 3000 km (1,800 mls) and at 8000 km (5,000 mls)

  • Semi-automatic clutch release (grease A00)
    Primary and gearbox
    Factory

    Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 3000 km (1,800 mls)

Every 2,000 mi or 12 months

1 item
  • Replace spark plugs (two-stroke)
    Engine
    Guideline

Every 3,000 mi or 12 months

10 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.

  • Clean fuel tap filter / sediment bowl
    Fuel and air
    Guideline
  • Check / set ignition timing
    Ignition and electrics
    Guideline
  • Clean and gap contact breaker points, oil cam felt
    Ignition and electrics
    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
  • 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 spoke tension and wheel true
    Wheels and tires
    Guideline

Every 3,000 mi or 2 years

1 item
  • Decarbonize exhaust ports, pipes and baffles
    Engine
    Guideline

    Two-strokes coke up the exhaust port and muffler baffles; power falls off gradually.

Every 3,100 mi

3 items
  • Adjust clutch free play, lubricate cable and lever pivot
    Primary and gearbox
    Factory

    Manual: Bowden cables (oil M2T). Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 5000 km (3,100 mls)

  • Change fork oil
    Front end
    Factory

    Manual: Front fork oil change (damper oil). Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed after 500 km covered and at 5000 km (3,100 mls)

  • Brake cams (grease A00)
    Brakes
    Factory

    Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 5000 km (3,100 mls)

Every 4,000 mi or 12 months

2 items
  • Inspect, clean and gap spark plugs
    Engine
    Guideline
  • Lubricate brake cam spindles, check linings and drums
    Brakes
    Guideline

Every 5,000 mi

3 items
  • Check steering head bearing adjustment
    Front end
    Factory

    Manual: Steering balls (grease A00). Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 8000 km (5,000 mls)

  • Inspect rear shocks for leaks and damping
    Rear suspension and frame
    Factory

    Manual: Rear suspension (damper oil). Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 8000 km (5,000 mls)

  • Check wheel bearings for play
    Wheels and tires
    Factory

    Manual: Wheel bearings (grease AV2). Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed at 8000 km (5,000 mls)

Every 6,000 mi or 12 months

5 items
  • Clean carburetor float bowl(s), check float level and jets
    Fuel and air
    Guideline

    Ethanol fuel varnishes old carbs quickly in storage.

  • Check charging voltage and regulator / cut-out
    Ignition and electrics
    Guideline
  • Check swingarm bushes for play
    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 6,000 mi or 2 years

3 items
  • Lubricate and check automatic advance unit
    Ignition and electrics
    Guideline
  • Magneto: clean slip ring and pickup brush, check HT lead
    Ignition and electrics
    Guideline
  • Change gearbox oil
    Primary and gearbox
    Guideline

Every 8,000 mi or 2 years

1 item
  • Replace spark plugs
    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

2 items
  • Replace air filter element
    Fuel and air
    Guideline
  • Grease swingarm pivot
    Rear suspension and frame
    Guideline

Every 12,000 mi or 3 years

1 item
  • Replace points and condenser
    Ignition and electrics
    Guideline

Every 15,000 mi

1 item
  • Replace brake linings / skim drums (wear based)
    Brakes
    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 25,000 mi or 6 years

1 item
  • Replace swingarm bushes / bearings
    Rear suspension and frame
    Guideline

Every 25,000 mi or 10 years

1 item
  • Magneto overhaul / re-magnetize, replace capacitor
    Ignition and electrics
    Guideline

    Weak spark when hot is the classic symptom. Old capacitors fail with age, not miles.

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

1 item
  • Check speedometer / odometer against a known distance
    Controls and cables
    Guideline

    Old speedos drift with tire size and drive wear. Use phone GPS over a measured 10 miles / km.

Every 2 years

2 items
  • Inspect wiring, bullet connectors and ground points
    Ignition and electrics
    Guideline
  • Inspect frame, welds and lugs for cracks
    Rear suspension and frame
    Guideline

Every 4 years

1 item
  • Replace fuel lines
    Fuel and air
    Guideline

    Old rubber and modern ethanol fuel do not mix well.

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

3 items
  • Swinging fork pin (grease A00)
    Front end
    Factory

    Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed after 500 km covered

  • Brake pedal pin (grease A00)
    Brakes
    Factory

    Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed after 500 km covered

  • Leverage pins, brake and clutch (oil M2T)
    Brakes
    Factory

    Factory: 2. Lubrication chart p.12 (groups: after 500 km (300 mls) covered, 3000 km (1,800 mls), 5000 km (3,100 mls), 8000 km (5,000 mls); lubricants: AV2 / A00 grease, PP7 SAE 80 gear oil, M2T SAE 40-50, damper oil): listed after 500 km covered

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.

Keep up with this schedule on your phone

Add the bike in the app and this chart loads itself, ready to log against and edit.

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Other 1994 CZ models

All 1994 CZ
CZ Road and motocross two-strokes
1946-1997
Road and motocross two-strokes
Guideline
1994
CZ
Guideline