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Yamaha · European two-stroke single (DKW, Jawa, CZ, MZ, Puch, Bultaco, Montesa, Ossa)

BWs 50

Library entry covers 2006-2016

28 factory 38 guideline

Published source

Yamaha CW50 BW'S 2013 Owner's Manual 2B6-F8199-E1 (UK, English), periodic maintenance chart for the emission control system p.6-2 and general maintenance and lubrication chart pp.6-3 to 6-5

Factory owner's handbook. Covers CW50 BW'S; 2013 UK owner's manual 2B6-F8199-E1, English. Chart columns 1000/6000/12000/18000/24000 km (600/3500/7000/10500/14000 mi) plus annual check; from 30000 km (17500 mi) repeat starting from the 6000 km (3500 mi) column. Two-stroke with Autolube oil injection, air cooled: no engine oil, oil filter, valve or coolant rows in the chart.

Open the source

66 items for a 2006 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: Automatic or semi-automatic
Final drive: Leather or rubber V-belt (veteran)
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

2006 Yamaha BWs 50

On the road: every 100 mi

1 item

Check drive belt tension and belt fastener

Pre-ride / on the road

Guideline

Leather and early rubber belts stretch and slip when wet. Carry a spare fastener and a belt punch.

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

2 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline

Every 500 mi

1 item

Dress / clean V-belt and pulley rims

Final drive

Guideline

Every 1,000 mi or 6 months

1 item

Adjust front drum brake

Brakes

Guideline

Every 2,000 mi or 12 months

1 item

Replace spark plugs (two-stroke)

Engine

Guideline

Every 3,000 mi or 12 months

7 items

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
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
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 3,500 mi or 12 months

15 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)
Replace spark plugs

Engine

Factory

Manual: Spark plug (replace). Factory: Emission control chart. Replace marked at 6000, 12000, 18000, 24000 km (3500-14000 mi); not at initial; annual check marked; no separate inspect row; not a dealer item (p.6-2)
Carburetor (adjust engine idling speed)

Fuel and air

Factory

Factory: Emission control chart. Every column incl. 1000 km (600 mi) initial; annual check; dealer item (p.6-2)
Check throttle cable(s) free play and return

Fuel and air

Factory

Manual: Throttle grip (check operation and free play, adjust if necessary, lubricate cable and grip housing). Factory: Marked 6000-24000 km; not at initial; annual check; dealer item (p.6-5)
Replace fuel lines

Fuel and air

Factory

Manual: Fuel line (check fuel and vacuum hoses for cracks or damage). Factory: Emission control chart. Marked 6000-24000 km (3500-14000 mi); not at 1000 km initial; annual check; dealer item (p.6-2)
Battery (check electrolyte level and specific gravity, check breather hose routing)

Ignition and electrics

Factory

Factory: Marked 6000-24000 km; not at initial; annual check; dealer item (p.6-3)
Grease and check center / side stand and springs

Rear suspension and frame

Factory

Manual: Centerstand (check operation, lubricate). Factory: Marked 6000-24000 km; annual check (p.6-4)
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 with shoes. Check marked every column incl. 1000 km initial; annual check; shoes replaced whenever worn to the limit; dealer item (p.6-3)
Check brake pads and discs

Brakes

Factory

Manual: Front brake (check operation, fluid level and fluid leakage; replace brake pads whenever worn to the limit). Factory: Hydraulic front brake. Check marked every column incl. 1000 km (600 mi) initial; annual check; pads replaced whenever worn to the limit; dealer item (p.6-3)
Front and rear brake switches (check operation)

Brakes

Factory

Factory: Every column incl. 1000 km initial; annual check; dealer item (p.6-4)
Front brake lever pivot shaft (lubricate with silicone grease)

Brakes

Factory

Factory: Marked 6000-24000 km; annual check (p.6-4)
Rear brake lever pivot shaft (lubricate with lithium-soap-based grease)

Brakes

Factory

Factory: Marked 6000-24000 km; annual check (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.6-3)
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.6-4)

Every 3,500 mi

5 items

Check steering head bearing adjustment

Front end

Factory

Manual: Steering bearings (check bearing play and steering for roughness). Factory: Marked every column incl. 1000 km (600 mi) initial through 24000 km; no annual check; dealer item (p.6-4)
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.6-4)
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Shock absorber assembly (check operation and shock absorber for oil leakage). Factory: Marked 6000-24000 km; no annual check; dealer item (p.6-4)
Check wheel bearings for play

Wheels and tires

Factory

Manual: Wheel bearings (check for looseness or damage). Factory: Marked 6000-24000 km; no annual check; dealer item (p.6-3)
Wheels (check runout and for damage)

Wheels and tires

Factory

Factory: Marked 6000-24000 km; no annual check; dealer item (p.6-3)

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 6,000 mi or 12 months

4 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 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

2 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

Every 6,000 mi

1 item

Replace drive belt (wear or damage based)

Final drive

Factory

Manual: V-belt (replace). Factory: Every 10000 km (6000 mi), printed as text; no inspection row; dealer item (p.6-4)

Every 7,000 mi or 12 months

1 item

Autolube pump (check operation, bleed if necessary)

Engine

Factory

Factory: Two-stroke oil injection pump. Marked at 1000 km (600 mi) initial, 12000 and 24000 km; annual check; dealer item (p.6-4)

Every 7,000 mi

3 items

Clean / inspect air filter

Fuel and air

Factory

Manual: Air filter element (clean). Factory: Clean marked at 6000 and 18000 km (3500/10500 mi); with the repeat rule, every 12000 km offset by 6000 km; no annual check; not a dealer item. TIP: more frequent service in unusually wet or dusty areas (p.6-3, 6-5)
Replace air filter element

Fuel and air

Factory

Manual: Air filter element (replace). Factory: Replace marked at 12000 and 24000 km (7000/14000 mi); no annual check; not a dealer item (p.6-3)
Change final drive (rear drive) oil

Final drive

Factory

Manual: Final transmission oil (change). Factory: Change marked at 1000 km (600 mi) initial, 12000 and 24000 km (7000/14000 mi); check for oil leakage marked at 1000, 6000 and 18000 km; no annual check; not a dealer item. Quantity 0.11 L (p.6-4, 6-8)

Every 10,000 mi or 2 years

2 items

Compression test (or leak-down)

Engine

Guideline
Change gearbox oil

Primary and gearbox

Guideline

Every 12,000 mi or 2 years

1 item

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 14,000 mi

1 item

Repack / replace steering head bearings

Front end

Factory

Manual: Steering bearings (lubricate with lithium-soap-based grease). Factory: Every 24000 km (14000 mi), printed as text; dealer item (p.6-4)

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 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 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.6-5): change every two years; regularly check and correct fluid level; not a chart row

Every 4 years

1 item

Inspect brake hoses; replace old rubber

Brakes

Factory

Manual: Brake hose (replace). Factory: Every 4 years, printed as text; check for cracks, damage, routing and clamping marked 6000-24000 km and annually; dealer item. TIP repeats: replace every four years and if cracked or damaged (p.6-3, 6-5)

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.