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BSA · Pushrod four-stroke single, dry sump, separate gearbox oil, chain drive

Victor 500-Trail

Library entry covers 1971

40 factory 66 guideline

Published source

BSA Owners' handbook, 250 cc and 500 cc models (B25SS, B25T, B50SS, B50T, B50MX), printed April 1972: routine maintenance p.14, routine lubrication (ManualsLib viewer pp.9 and 15)

Factory owner's handbook. Covers BSA Owners' handbook for the 1972 250 cc and 500 cc models, printed April 1972; names Model B50SS Gold Star 500SS and Model B50T Victor 500.

106 items for a 1971 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: Dry sump (separate oil tank)
Oil filtration: Replaceable cartridge or spin-on filter
Valve gear: Overhead valve, pushrods, adjustable tappets
Ignition: Battery and coil with contact points
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: Hand lever, cable
Final drive: Chain
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

1971 BSA Victor 500-Trail

On the road: every 300 km

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 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

Walk-around: check nuts and bolts for vibration loosening

Pre-ride / on the road

Guideline

Old machines shake things loose: exhaust nuts, mudguard stays, footrests, tank mounts, battery strap.

On the road: every 1,000 km

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

On the road: every 1,600 km

1 item

Check road kit: plugs, points file, master link, tube patches, wire, tape

Pre-ride / on the road

Guideline

Every 402 km

1 item

Engine oil level (check)

Engine

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 250 miles. Mileages are for normal road use; machines used for competition need shorter service periods.

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

4 items

Check gearbox oil level

Primary and gearbox

Guideline
Adjust front drum brake

Brakes

Guideline
Adjust rear drum brake and rod / cable linkage

Brakes

Guideline
Inspect tire tread, sidewalls and date codes

Wheels and tires

Guideline

Every 1,609 km

1 item

Primary chaincase oil level (check)

Final drive

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 1,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.

Every 2,500 km or 6 months

1 item

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.

Every 2,500 km or 12 months

1 item

Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline

Every 3,000 km or 12 months

3 items

Inspect, clean and gap spark plugs

Engine

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline
Lubricate control cables and lever pivots

Controls and cables

Guideline

Every 3,219 km

15 items

Auto-advance mechanism (lubricate)

Engine

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Auto-advance unit (examine)

Engine

Factory

Factory: Routine maintenance (printed p.14): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Nuts and bolts tightness (check)

Engine

Factory

Factory: Routine maintenance (printed p.14): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Speedometer drive (grease)

Engine

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Contact breaker cam (lubricate)

Ignition and electrics

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Contact breaker points (clean, check gap)

Ignition and electrics

Factory

Factory: Routine maintenance (printed p.14): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Spark timing (check)

Ignition and electrics

Factory

Factory: Routine maintenance (printed p.14): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Clutch cable (grease)

Primary and gearbox

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Gearbox oil level (check)

Primary and gearbox

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Rear chain (lubricate)

Final drive

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Rear chain adjustment (check)

Final drive

Factory

Factory: Routine maintenance (printed p.14): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Center and side stand pivots (lubricate, oil)

Rear suspension and frame

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Brake adjustment (check)

Brakes

Factory

Factory: Routine maintenance (printed p.14): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Brake pedal pivot (lubricate)

Brakes

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Exposed cables and control rod joints (oil)

Controls and cables

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 2,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.

Every 4,000 km or 12 months

1 item

Change engine oil

Engine

Guideline

Pre-1970 machines: many owners run non-detergent or classic-spec oil with no filter, so short intervals matter. Dry sump: drain the tank and the crankcase/sump, flush the tank and clean the feed and return screens.

Every 5,000 km or 12 months

18 items

Check and adjust valve clearances

Engine

Guideline
Check engine mounting bolts and plates

Engine

Guideline
Replace oil filter

Engine

Guideline
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
Adjust clutch pushrod / clutch adjuster

Primary and gearbox

Guideline
Check chain guard, chain oiler (if fitted), rear chain case

Final drive

Guideline
Inspect chain and sprockets for wear (measure stretch)

Final drive

Guideline
Check steering damper (friction or hydraulic)

Front end

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 spoke tension and wheel true

Wheels and tires

Guideline
Check wheel bearings for play

Wheels and tires

Guideline

Every 6,437 km

14 items

Lights (check)

Engine

Factory

Factory: Routine maintenance (printed p.14): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Oil filters (clean)

Engine

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 4,000 miles (the external oil filter line is for 250 cc models only). Mileages are for normal road use; machines used for competition need shorter service periods.
Oil pump ball valve

Engine

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 4,000 miles (see page 18); the verb on this line is hidden by the host watermark. Mileages are for normal road use; machines used for competition need shorter service periods.
Oil reservoir (drain and refill)

Engine

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Spark plug (clean, adjust)

Engine

Factory

Factory: Routine maintenance (printed p.14): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Valve clearances (check)

Engine

Factory

Factory: Routine maintenance (printed p.14): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Air filter (clean)

Fuel and air

Factory

Factory: Routine maintenance (printed p.14): every 4,000 miles; the air filter section says attend to it at a maximum of 2,000 miles, more often in dusty climates. Mileages are for normal road use; machines used for competition need shorter service periods.
Clutch operation (check)

Primary and gearbox

Factory

Factory: Routine maintenance (printed p.14): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Gearbox oil (drain and refill)

Primary and gearbox

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Primary chain adjustment (check)

Final drive

Factory

Factory: Routine maintenance (printed p.14): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Primary chaincase oil (drain and refill)

Final drive

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Steering head adjustment (check)

Front end

Factory

Factory: Routine maintenance (printed p.14): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Rear brake cam spindle (grease)

Brakes

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 4,000 miles (page 33); this line is partly hidden by the host watermark. Mileages are for normal road use; machines used for competition need shorter service periods.
Wheel alignment (check)

Wheels and tires

Factory

Factory: Routine maintenance (printed p.14): every 4,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.

Every 6,500 km or 12 months

2 items

Replace spark plugs

Engine

Guideline
Lubricate brake cam spindles, check linings and drums

Brakes

Guideline

Every 8,000 km or 2 years

1 item

Check cylinder head bolt torque

Engine

Guideline

Air-cooled iron and alloy engines can lose head bolt tension; follow your manual's sequence and whether it is done hot or cold.

Every 9,500 km or 12 months

5 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
Inspect rear shocks for leaks and damping

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 9,500 km or 2 years

3 items

Check engine breather and oil return

Engine

Guideline
Lubricate and check automatic advance unit

Ignition and electrics

Guideline
Change gearbox oil

Primary and gearbox

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

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 16,093 km

6 items

Headlight beam setting (check)

Engine

Factory

Factory: Routine maintenance (printed p.14): every 10,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Rear suspension action (examine)

Engine

Factory

Factory: Routine maintenance (printed p.14): every 10,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Front fork action (examine)

Front end

Factory

Factory: Routine maintenance (printed p.14): every 10,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Front forks (drain and refill)

Front end

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 10,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Brake linings (examine) and brake drums (clean)

Brakes

Factory

Factory: Routine maintenance (printed p.14): every 10,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.
Wheel bearings (clean and repack with grease)

Wheels and tires

Factory

Factory: Routine lubrication (ManualsLib viewer p.15): every 10,000 miles. Mileages are for normal road use; machines used for competition need shorter service periods.

Every 19,500 km or 2 years

1 item

Replace air filter element

Fuel and air

Guideline

Every 19,500 km or 3 years

1 item

Replace points and condenser

Ignition and electrics

Guideline

Every 24,000 km or 5 years

1 item

Inspect clutch plates and springs

Primary and gearbox

Guideline

Every 24,000 km

1 item

Replace brake linings / skim drums (wear based)

Brakes

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 48,500 km 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 12 months

1 item

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

3 items

Inspect fuel tank for rust, sealer failure, leaks

Fuel and air

Guideline
Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline

Every 4 years

1 item

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.

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

No interval set

3 items

Gas tap filters

Engine

Factory

Factory: Routine maintenance (printed p.14): as required. Mileages are for normal road use; machines used for competition need shorter service periods.
Battery acid level (examine)

Ignition and electrics

Factory

Factory: Routine maintenance (printed p.14): every week. Mileages are for normal road use; machines used for competition need shorter service periods.
Tire pressures (check)

Wheels and tires

Factory

Factory: Routine maintenance (printed p.14): every week. Mileages are for normal road use; machines used for competition need shorter service periods.

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.