Yamaha · Modern air-cooled single (2000-)

MT-125

Library entry covers 2015-2024

29 factory 28 guideline

Published source

Yamaha MT125/MT125A Owner's Manual 5D7-F8199-E4 (English), Periodic maintenance charts pp.6-3 to 6-7

Factory owner's handbook. Covers 2014 (MT125 / MT125A, EU owner's manual 5D7-F8199-E4, printed 2014).

Open the source

57 items for a 2015 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, twin shocks
Front brake: Disc, hydraulic
Rear brake: Drum (or band / belt rim)
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

2015 Yamaha MT-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

2 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline

On the road: every 600 mi

2 items

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline
Lubricate drive chain

Pre-ride / on the road

Factory

Manual: Drive chain (check slack, alignment; adjust and lubricate). Factory: Every 1000 km (600 mi) and after washing or riding in rain

Every 1,000 mi or 6 months

1 item

Adjust rear drum brake and rod / cable linkage

Brakes

Guideline

Every 1,800 mi

1 item

Change engine oil

Engine

Factory

Manual: Engine oil (change). Factory: Indicator: 1000km(600mi) initial, 2000km later, then every 3000km(1800mi)

Every 3,000 mi or 12 months

4 items

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 footrests, pegs, rear brake and gear lever pivots

Rear suspension and frame

Guideline
Check spoke tension and wheel true

Wheels and tires

Guideline

Every 3,500 mi or 12 months

9 items

Chassis fasteners (check tightness)

Engine

Factory

Factory: 6000km columns and annual check
Inspect coolant hoses and clamps

Engine

Factory

Manual: Cooling system (check coolant level and leakage). Factory: 6000km columns and annual check
Check throttle cable(s) free play and return

Fuel and air

Factory

Manual: Throttle grip (check free play, lubricate cable and housing). Factory: 6000km columns and annual check
Fuel injection (check engine idle speed)

Fuel and air

Factory

Factory: 6000km columns and annual check
Check battery electrolyte, top up with distilled water

Ignition and electrics

Factory

Manual: Battery (check electrolyte level and specific gravity, breather hose). Factory: 6000km columns and annual check
Grease and check center / side stand and springs

Rear suspension and frame

Factory

Manual: Sidestand (check operation, lubricate). Factory: 6000km columns and annual check
Check brake pads and discs

Brakes

Factory

Manual: Front/rear brake (check operation, fluid level, leakage). Factory: Every column incl. initial; pads replaced whenever worn to limit
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Tires (check tread depth, damage, pressure). Factory: 6000km columns and annual check
Lubricate control cables and lever pivots

Controls and cables

Factory

Manual: Moving parts and cables; lever and pedal pivots (lubricate). Factory: 6000km columns and annual check

Every 3,500 mi

8 items

Check and adjust valve clearances

Engine

Factory

Manual: Valves (check clearance, adjust). Factory: 6000km(3500mi) columns; from 30000km repeat from 6000km
Replace oil filter

Engine

Factory

Manual: Engine oil filter element (replace). Factory: Marked 1000km initial, then every 6000km column
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Factory

Manual: Clutch (check operation, adjust). Factory: Marked 1000km initial, then every 6000km
Check steering head bearing adjustment

Front end

Factory

Manual: Steering bearings (check play and roughness). Factory: Marked 1000km initial, then every 6000km
Inspect fork seals, stanchions and fork boots

Front end

Factory

Manual: Front fork (check operation and oil leakage). Factory: 6000km columns
Check swingarm bushes for play

Rear suspension and frame

Factory

Manual: Swingarm (check operation and excessive play). Factory: 6000km columns
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Shock absorber assembly (check operation and oil leakage). Factory: 6000km columns
Check wheel bearings for play

Wheels and tires

Factory

Manual: Wheel bearings (check looseness or damage). Factory: 6000km columns

Every 4,000 mi or 12 months

1 item

Lubricate brake cam spindles, check linings and drums

Brakes

Guideline

Every 6,000 mi or 12 months

2 items

Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Guideline

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

Every 7,000 mi

5 items

Inspect, clean and gap spark plugs

Engine

Factory

Manual: Spark plug (check condition, clean, regap). Factory: Marked at 6000km and 18000km; cols 1000/6000/12000/18000/24000km
Replace spark plugs

Engine

Factory

Manual: Spark plug (replace). Factory: Marked at 12000km and 24000km
Clean / inspect air filter

Fuel and air

Factory

Manual: Air filter element (clean). Factory: Clean at 6000km and 18000km
Replace air filter element

Fuel and air

Factory

Manual: Air filter element (replace). Factory: Marked at 12000km and 24000km
Clean and grease rear suspension linkage

Rear suspension and frame

Factory

Manual: Rear suspension relay arm and connecting arm pivots (lubricate). Factory: Lubricate at 12000km and 24000km; check every 6000km

Every 10,000 mi or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 12,000 mi or 2 years

1 item

Synchronize throttle bodies

Fuel and air

Guideline

Every 14,000 mi

2 items

Repack / replace steering head bearings

Front end

Factory

Manual: Steering bearings (lubricate, lithium-soap grease). Factory: Every 24000 km (14000 mi)
Grease swingarm pivot

Rear suspension and frame

Factory

Manual: Swingarm (lubricate, lithium-soap grease). Factory: Every 24000 km (14000 mi)

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 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

1 item

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 2 years

3 items

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

Factory

Manual: Brake fluid (replace). Factory: Every 2 years

Every 3 years

1 item

Replace coolant

Engine

Factory

Manual: Cooling system (change coolant). Factory: Every 3 years

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

Factory

Manual: Brake hoses (replace). Factory: Every 4 years; checked every 6000km and annually
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.