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Aprilia · Two-stroke single, oil injection, chain drive

ETX 125

Library entry covers 1987-2001

38 factory 64 guideline

Published source

Aprilia ETX 125 use and maintenance book (part# 8102852), ManualsLib

Factory owner's handbook. Covers edition year not shown.

102 items for a 1991 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 oil injection (Autolube, Injectolube, Pilgrim pump...)
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: Liquid 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: Disc, hydraulic
Rear brake: Drum (or band / belt rim)
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

1991 Aprilia ETX 125

On the road: every 200 km

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 500 km

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 800 km

1 item

Check coolant level

Pre-ride / on the road

Guideline

On the road: every 1,000 km

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

Every 500 km

3 items

2-stroke oil level (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 500 km.
Drive chain (check)

Final drive

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 500 km.
Drive chain tension and lubrication

Final drive

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 500 km.

Every 1,000 km

1 item

Suspensions (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in (dealer).

Every 1,600 km 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 1,600 km or 6 months

2 items

Adjust rear drum brake and rod / cable linkage

Brakes

Guideline
Inspect tire tread, sidewalls and date codes

Wheels and tires

Guideline

Every 2,000 km

1 item

Coolant (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 2000 km.

Every 3,000 km or 12 months

1 item

Replace spark plugs (two-stroke)

Engine

Guideline

Every 4,000 km or 8 months

20 items

2-stroke oil reserve warning light (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months.
Braking systems (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months (dealer).
Cooling system (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months (dealer).
Engine idling rpm (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Adjust after running-in; check every 4000 km or 8 months.
Exhaust muffler (check; catalytic version excluded)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months.
Light system (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months.
Nut, bolt and screw tightening (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months (dealer).
Spark plug (clean)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months.
Air cleaner (clean)

Fuel and air

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 4000 km or 8 months.
Carburetor (clean)

Fuel and air

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Check after running-in; clean every 4000 km or 8 months.
Fuel cock (check)

Fuel and air

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months.
Fuel pipes (check)

Fuel and air

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months.
Battery electrolyte level (check)

Ignition and electrics

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months.
Clutch clearance (adjust)

Primary and gearbox

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months.
Transmission oil (check)

Primary and gearbox

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 4000 km or 8 months.
Steering bearings and steering (check)

Front end

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months (dealer).
Brake fluid (check)

Brakes

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months.
Wheel balancing (check)

Wheels and tires

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 4000 km or 8 months (dealer).
Wheel bearings (check)

Wheels and tires

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 4000 km or 8 months (dealer).
Wheel spoke tension (check)

Wheels and tires

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in and every 4000 km or 8 months (dealer).

Every 5,000 km or 12 months

14 items

Check throttle cable(s) free play and return

Fuel and air

Guideline
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
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 5,000 km 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 6,500 km or 12 months

4 items

Check / bleed / adjust oil injection pump cable

Engine

Guideline
Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline
Lubricate brake cam spindles, check linings and drums

Brakes

Guideline

Every 8,000 km or 16 months

3 items

2-stroke oil pump and air bleeding (adjust)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Check after running-in; adjust every 8000 km or 16 months (dealer).
Spark plug (change)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 8000 km or 16 months.
Air cleaner (check or change)

Fuel and air

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 8000 km or 16 months.

Every 8,000 km

3 items

Piston and linings (check)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 8000 km (dealer).
Fork oil (check)

Front end

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 8000 km (dealer).
Start lever pin (lubricate with water-repellent grease)

Controls and cables

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 8000 km.

Every 9,500 km or 12 months

7 items

Inspect coolant hoses and clamps

Engine

Guideline
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
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 9,500 km 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 12,000 km

1 item

Transmission oil (change)

Primary and gearbox

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. After running-in, then every 12000 km.

Every 13,000 km or 2 years

1 item

Replace spark plugs

Engine

Guideline

Every 16,000 km or 2 years

2 items

Compression test (or leak-down)

Engine

Guideline
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 km

2 items

Piston and linings (change)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 16000 km (dealer).
Fork oil (change)

Front end

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 16000 km (dealer).

Every 19,500 km or 2 years

2 items

Replace air filter element

Fuel and air

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 19,500 km or 3 years

1 item

Replace points and condenser

Ignition and electrics

Guideline

Every 24,000 km

1 item

Replace brake linings / skim drums (wear based)

Brakes

Guideline

Every 29,000 km

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 32,000 km 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 40,000 km or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 40,000 km 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 48,500 km or 6 years

1 item

Rebuild forks: seals, bushes, springs

Front end

Guideline

Every 1 month

1 item

Tire pressure (check)

Wheels and tires

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Adjust after running-in; check every month.

Every 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 12 months

2 items

Brake fluid (change)

Brakes

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every year.
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

5 items

Coolant (change)

Engine

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 2 years.
Replace coolant

Engine

Guideline
Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Replace brake fluid

Brakes

Guideline

Every 4 years

5 items

Replace oil injection delivery lines

Engine

Guideline
Fuel pipes (change)

Fuel and air

Factory

Factory: Regular service intervals chart (Aprilia ETX 125 use and maintenance book, part# 8102852, edition year not shown, printed p.39). Columns: after running-in (1000 km) or 4 months; every 4000 km or 8 months; every 8000 km or 16 months. Key: C check, clean, adjust, lubricate or change if necessary; P clean; S change; R adjust. Service more often in rainy or dusty areas or on uneven ground. Every 4 years.
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

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.