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Yamaha · Overhead-cam four-stroke single, wet sump, separate gearbox oil, CVT belt drive

BWs 125

Library entry covers 2010-2020

30 factory 31 guideline

Published source

Yamaha YW125 BW'S 125 2011 Owner's Manual 1CX-F8199-E0 (UK, English), periodic maintenance charts pp.6-3 to 6-5, TIPs pp.6-3 and 6-6

Factory owner's handbook. Covers YW125 BW'S 125; 2011 UK owner's manual 1CX-F8199-E0, English. Chart columns 1000/6000/12000/18000/24000 km (600/3500/7000/10500/14000 mi) plus annual check; from 30000 km (17500 mi) repeat the intervals starting from 6000 km (3500 mi); annual checks every year except if a kilometer-based (UK: mileage-based) maintenance is performed instead. Air cooled, fuel injected, V-belt drive.

Open the source

61 items for a 2013 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: Separate gearbox oil
Clutch control: Automatic or semi-automatic
Final drive: Belt CVT, scooter automatic
Front suspension: Telescopic fork
Rear suspension: Swingarm, single shock / cantilever
Front brake: Disc, hydraulic
Rear brake: Drum (or band / belt rim)
Wheels: Cast / alloy, tubeless
Sidecar: No sidecar

Maintenance schedule

2013 Yamaha BWs 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

Every 1,800 mi

1 item

Change engine oil

Engine

Factory

Manual: Engine oil (change, check oil level and vehicle for oil leakage). Factory: Marked at 1000 km (600 mi) initial, then every 3000 km (1800 mi), printed as text spanning the 6000 km to annual columns (no separate annual check mark); not a dealer item (p.6-5)

Every 3,000 mi or 12 months

3 items

Adjust automatic / semi-automatic clutch

Primary and gearbox

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

Every 3,500 mi or 12 months

16 items

Chassis fasteners (make sure all nuts, bolts and screws are properly tightened)

Engine

Factory

Factory: Marked 6000-24000 km; annual check; dealer item (p.6-4)
Lights, signals and switches (check operation, adjust headlight beam)

Engine

Factory

Factory: Every column incl. 1000 km initial; annual check; dealer item (p.6-5)
Check throttle cable(s) free play and return

Fuel and air

Factory

Manual: Throttle grip (check operation, check throttle grip free play and adjust if necessary, lubricate cable and grip housing). Factory: Marked 6000-24000 km; not at initial; annual check; dealer item (p.6-5)
Fuel injection (check engine idle speed)

Fuel and air

Factory

Factory: Every column incl. 1000 km (600 mi) initial; annual check; dealer item (p.6-3)
Replace fuel lines

Fuel and air

Factory

Manual: Fuel line (check fuel hoses for cracks or damage). Factory: Marked 6000-24000 km (3500-14000 mi); not at 1000 km initial; annual check; dealer item (p.6-3)
Change final drive (rear drive) oil

Final drive

Factory

Manual: Final transmission oil (check vehicle for oil leakage, change). Factory: Single row combining 'check for oil leakage' and 'change', marked every column incl. 1000 km (600 mi) initial and annual check; the chart does not separate which columns are change versus leakage check, so read as printed (change interval may be longer in practice); not a dealer item (p.6-5)
Check steering head bearing adjustment

Front end

Factory

Manual: Steering bearings (check bearing assemblies for looseness). Factory: Check marked at 1000, 6000 and 18000 km (the 12000 and 24000 km columns read 'Repack'); annual check marked; dealer item (p.6-4)
Grease and check center / side stand and springs

Rear suspension and frame

Factory

Manual: Sidestand, centerstand (check operation, lubricate with lithium-soap-based grease). Factory: Marked 6000-24000 km; annual check; not a dealer item (p.6-5)
Sidestand switch (check operation)

Rear suspension and frame

Factory

Factory: Every column incl. 1000 km initial; annual check; dealer item (p.6-5)
Adjust rear drum brake and rod / cable linkage

Brakes

Factory

Manual: Rear brake (check operation and adjust brake lever free play; replace brake shoes whenever worn to the limit). Factory: Drum rear brake. Check marked every column incl. 1000 km (600 mi) initial; annual check; shoes replaced whenever worn to the limit; dealer item (p.6-4)
Check brake pads and discs

Brakes

Factory

Manual: Front brake (check operation, fluid level and vehicle for fluid leakage; adjust brake lever free play; replace brake pads whenever worn to the limit). Factory: Hydraulic disc. Check marked every column incl. 1000 km (600 mi) initial; annual check; pads replaced whenever worn to the limit; dealer item (p.6-4)
Front and rear brake switches (check operation)

Brakes

Factory

Factory: Every column incl. 1000 km initial; annual check; dealer item (p.6-5)
Front brake lever pivot shaft (lubricate with lithium-soap-based grease)

Brakes

Factory

Factory: Marked 6000-24000 km; annual check; not a dealer item; lithium-soap grease as printed (p.6-4)
Rear brake lever pivoting points (lubricate with silicone grease)

Brakes

Factory

Factory: Marked 6000-24000 km; annual check; dealer item; silicone grease as printed (p.6-4)
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Tires (check tread depth and for damage, replace if necessary, check and correct air pressure). Factory: Marked 6000-24000 km; annual check; dealer item (p.6-4)
Lubricate control cables and lever pivots

Controls and cables

Factory

Manual: Moving parts and cables (lubricate). Factory: Marked 6000-24000 km; annual check; not a dealer item (p.6-5)

Every 3,500 mi

9 items

Check and adjust valve clearances

Engine

Factory

Manual: Valves (check valve clearance, adjust). Factory: Every column incl. 1000 km (600 mi) initial; no annual check; dealer item (p.6-3)
Clean oil strainers / mesh screens

Engine

Factory

Manual: Engine oil strainer (clean). Factory: Marked at 1000 km (600 mi) initial, then every 6000 km (3500 mi), printed as text; dealer item (p.6-5)
Replace spark plugs

Engine

Factory

Manual: Spark plug (replace). Factory: Replace marked at 6000, 12000, 18000, 24000 km (3500-14000 mi); not at 1000 km initial; no annual check; no separate inspect row; not a dealer item (p.6-3)
Replace air filter element

Fuel and air

Factory

Manual: Air filter element (replace). Factory: Replace marked at 6000, 12000, 18000, 24000 km; not at initial; no annual check; not a dealer item. TIP: disposable oil-coated paper element, must not be cleaned with compressed air; replace more frequently in unusually wet or dusty areas (p.6-4, 6-6)
V-belt case air filter element (clean, replace if necessary)

Fuel and air

Factory

Factory: Marked 6000-24000 km; no annual check; dealer item. TIP: service more frequently in unusually wet or dusty areas (p.6-4, 6-6)
Front fork (check operation and for oil leakage)

Front end

Factory

Factory: Marked 6000-24000 km; no annual check; no fork oil change interval printed; dealer item (p.6-5)
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Shock absorber assemblies (check operation and shock absorber for oil leakage). Factory: Marked 6000-24000 km; no annual check; dealer item (p.6-5)
Check wheel bearings for play

Wheels and tires

Factory

Manual: Wheel bearings (check bearing for looseness or damage). Factory: Marked 6000-24000 km; no annual check; dealer item (p.6-4)
Wheels (check runout and for damage)

Wheels and tires

Factory

Factory: Marked 6000-24000 km; no annual check; dealer item (p.6-4)

Every 4,000 mi or 12 months

3 items

Inspect, clean and gap spark plugs

Engine

Guideline
Inspect CVT drive belt, rollers / sliders and clutch shoes

Final drive

Guideline

Typical scooter interval. Your owner's manual figure governs; check belt width against the service limit.
Lubricate brake cam spindles, check linings and drums

Brakes

Guideline

Every 5,000 mi or 12 months

1 item

Replace oil filter

Engine

Guideline

Every 6,000 mi or 12 months

4 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
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 or 2 years

1 item

Repack / replace steering head bearings

Front end

Factory

Manual: Steering bearings (moderately repack with lithium-soap-based grease). Factory: Job text says every 12000 km (7000 mi) or 24 months; 'Repack' printed in the 12000 and 24000 km columns; dealer item (p.6-4)

Every 10,000 mi or 2 years

2 items

Compression test (or leak-down)

Engine

Guideline
Change gearbox oil

Primary and gearbox

Guideline

Every 10,500 mi

1 item

Replace drive belt (wear or damage based)

Final drive

Factory

Manual: V-belt (replace). Factory: Every 18000 km (10500 mi), printed as text; no inspection row; dealer item (p.6-5)

Every 12,000 mi or 2 years

3 items

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 12,000 mi or 3 years

1 item

Replace CVT drive belt

Final drive

Guideline

Typical scooter interval, or sooner if the belt is cracked, glazed or below its width limit.

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 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 (change). Factory: From the hydraulic brake service TIP (p.6-6): every two years replace the internal components of the brake master cylinder and caliper and change the brake fluid; always change the fluid after disassembling master cylinder or caliper; not a chart row

Every 4 years

2 items

Inspect brake hoses; replace old rubber

Brakes

Factory

Manual: Brake hose (replace). Factory: Every 4 years, printed as text; check for cracks or damage and correct routing and clamping marked 6000-24000 km and annually; dealer item. TIP repeats: replace every four years and if cracked or damaged (p.6-4, 6-6)
Rebuild calipers and master cylinders (seals)

Brakes

Guideline

Every 6 years

1 item

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.