Yamaha PW 50 — Example photo: Galka rem, CC BY-SA 3.0, Wikimedia Commons

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Yamaha · Two-stroke single, oil injection, shaft drive

PW 50

Library entry covers 2002-2025

18 factory 31 guideline

Published source

Yamaha 2009 PW50 Owner's Manual LIT-11626-22-24, Periodic maintenance charts pp.7-3 to 7-5

Factory owner's handbook. Covers 2009 (PW50, US owner's manual LIT-11626-22-24, printed Mar 2008).

Open the source

49 items for a 2009 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: Electronic (CDI / transistor / ECU)
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: Shaft
Front suspension: Telescopic fork
Rear suspension: Swingarm, single shock / cantilever
Front brake: Drum (or band / stirrup)
Rear brake: Drum (or band / belt rim)
Wheels: Cast / alloy, tubeless
Sidecar: No sidecar

Maintenance schedule

2009 Yamaha PW 50

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 3,000 mi or 12 months

5 items

Clean fuel tap filter / sediment bowl

Fuel and air

Guideline
Adjust automatic / semi-automatic clutch

Primary and gearbox

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

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

Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Check final drive for leaks and bearing play

Final drive

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 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

3 items

Replace air filter element

Fuel and air

Guideline
Clean and grease rear suspension linkage

Rear suspension and frame

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

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 16,000 mi or 4 years

1 item

Replace spark plugs

Engine

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 30,000 mi or 6 years

1 item

Rebuild forks: seals, bushes, springs

Front end

Guideline

Every 6 months

14 items

Chassis fasteners (check all fittings and fasteners)

Engine

Factory

Factory: Initial 1/3/6 months, thereafter every 6 months
Check / bleed / adjust oil injection pump cable

Engine

Factory

Manual: Autolube pump (check operation, correct, bleed). Factory: Initial 1/3/6 months, thereafter every 6 months
Decarbonize exhaust ports, pipes and baffles

Engine

Factory

Manual: Cylinder head and exhaust system (check leakage, decarbonize). Factory: Initial 3/6 months, thereafter every 6 months
Replace spark plugs (two-stroke)

Engine

Factory

Manual: Spark plug (check condition, clean, regap, replace if necessary). Factory: Initial 1/3/6 months, thereafter every 6 months
Spark arrester (clean)

Engine

Factory

Factory: Initial 6 months, thereafter every 6 months
Check throttle cable(s) free play and return

Fuel and air

Factory

Manual: Throttle grip housing and cable (check free play, lubricate). Factory: Initial 1/3/6 months, thereafter every 6 months
Clean / inspect air filter

Fuel and air

Factory

Manual: Air filter element (clean with solvent, replace if necessary). Factory: Initial 3/6 months, thereafter every 6 months
Clean carburetor float bowl(s), check float level and jets

Fuel and air

Factory

Manual: Carburetor (check idling speed and starter operation; clean). Factory: Idle check every 6 months; clean at 6 months then every 12 months
Clean battery terminals, check charge and strap

Ignition and electrics

Guideline
Grease and check center / side stand and springs

Rear suspension and frame

Factory

Manual: Centerstand pivot (check operation, lubricate). Factory: Initial 3/6 months, thereafter every 6 months
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Shock absorber assemblies (check operation and oil leakage). Factory: Initial 1/3/6 months, thereafter every 6 months
Adjust front drum brake

Brakes

Factory

Manual: Front brake (check operation, adjust lever free play). Factory: Initial 1/3/6 months, thereafter every 6 months
Adjust rear drum brake and rod / cable linkage

Brakes

Factory

Manual: Rear brake (check operation, adjust lever free play). Factory: Initial 1/3/6 months, thereafter every 6 months
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Tires (check tread depth, damage, pressure). Factory: Initial 1/3/6 months, thereafter every 6 months

Every 12 months

4 items

Change final drive (rear drive) oil

Final drive

Factory

Manual: Transmission oil (change). Factory: Change at 1 and 6 months, thereafter every 12 months
Repack / replace steering head bearings

Front end

Factory

Manual: Steering bearings (check, moderately repack lithium-soap grease). Factory: Initial 6 months, thereafter every 12 months; grease every 2 years
Check wheel bearings for play

Wheels and tires

Factory

Manual: Wheel bearings (check smooth operation). Factory: Every 12 months
Lubricate control cables and lever pivots

Controls and cables

Factory

Manual: Control cable (apply chain and cable lube or engine oil 10W-30). Factory: Initial 3/6 months, thereafter every 12 months

Every 2 years

3 items

Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Lubricate drive shaft splines / check U-joint

Final drive

Factory

Manual: Middle and final gear cases (check gears, lubricate lithium-soap grease). Factory: Every 2 years; check for grease leakage every 6 months
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline

Every 4 years

2 items

Replace oil injection delivery lines

Engine

Guideline
Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.

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.