Ducati · Ducati bevel single (narrow and wide case 1961-1974)

Wide case 250 / 350 / 450 Mark 3 / Desmo

Library entry covers 1968-1974

13 factory 52 guideline

Published source

Ducati 450 Mark 3 Use and Maintenance (Ducati Meccanica), Maintenance pp.44-45 and Lubrication p.22

Factory owner's handbook. Covers 450 Mark 3 / Desmo / Scrambler use and maintenance book (Ducati), intervals in km and miles.

Open the source

65 items for a 1968 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: Mesh screens / strainers only
Valve gear: Overhead cam, screw/locknut adjusters
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: Shares engine 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

1968 Ducati Wide case 250 / 350 / 450 Mark 3 / Desmo

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

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 500 mi

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 600 mi

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

On the road: every 1,000 mi

1 item

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

Pre-ride / on the road

Guideline

Every 310 mi

1 item

Check cylinder head bolt torque

Engine

Factory

Manual: Cylinder head bolts: tighten; brakes: readjust. Factory: Maintenance pp.44-45: tire pressures checked at the same interval

Every 620 mi

3 items

Check and adjust valve clearances

Engine

Factory

Manual: Valve to rocker clearances: check (shim at the valve stem). Factory: Maintenance pp.44-45: also checked every 500 km in the list
Inspect, clean and gap spark plugs

Engine

Factory

Manual: Spark plug: clean and gap 0.8 mm. Factory: Maintenance pp.44-45
Clean and gap contact breaker points, oil cam felt

Ignition and electrics

Factory

Manual: Contact breaker points: clean, gap 0.3-0.4 mm. Factory: Maintenance pp.44-45: 2 drops of thin oil on the cam wick every 2,000 km

Every 930 mi

1 item

Lubricate speedometer / tachometer cables, check drive

Controls and cables

Factory

Manual: Speedometer drive: lubricate. Factory: Maintenance pp.44-45

Every 1,000 mi 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 1,000 mi or 6 months

4 items

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
Lubricate control cables and lever pivots

Controls and cables

Guideline

Every 1,240 mi

6 items

Change engine oil

Engine

Factory

Manual: Engine oil: drain hot and refill. Factory: Maintenance pp.44-45: top up the level every 500 km (310 mi)
Clean / inspect air filter

Fuel and air

Factory

Manual: Carburetor air filter: wash and blow out. Factory: Maintenance pp.44-45
Synchronize carburetors

Fuel and air

Factory

Manual: Carburetor float chamber, main and idle jets: clean. Factory: Maintenance pp.44-45
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Factory

Manual: Clutch: readjust. Factory: Maintenance pp.44-45
Grease swingarm pivot

Rear suspension and frame

Factory

Manual: Rear fork hinge: lubricate. Factory: Maintenance pp.44-45
Check spoke tension and wheel true

Wheels and tires

Factory

Manual: Spoke nipples and wheel nuts: tighten. Factory: Maintenance pp.44-45

Every 1,500 mi 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 3,000 mi or 12 months

13 items

Check engine mounting bolts and plates

Engine

Guideline
Check throttle cable(s) free play and return

Fuel and air

Guideline
Clean fuel tap filter / sediment bowl

Fuel and air

Guideline
Check / set ignition timing

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 wheel bearings for play

Wheels and tires

Guideline

Every 4,000 mi or 12 months

2 items

Replace 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
Inspect rear shocks for leaks and damping

Rear suspension and frame

Guideline

Every 6,000 mi or 2 years

4 items

Check engine breather and oil return

Engine

Guideline
Lubricate and check automatic advance unit

Ignition and electrics

Guideline
Change fork oil

Front end

Guideline

Some early telescopic forks are grease filled or use very small oil quantities. Check your manual.
Repack / replace wheel bearings

Wheels and tires

Guideline

Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Every 6,200 mi

1 item

Clean oil strainers / mesh screens

Engine

Factory

Manual: Centrifugal oil filter (crankshaft plug B): clean. Factory: Maintenance pp.44-45: the carburetor oil filter is washed every 2,000 km

Every 10,000 mi or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 10,000 mi or 3 years

1 item

Repack / replace steering head bearings

Front end

Guideline

Many old machines use loose balls in cups and cones. Taper roller conversions are common.

Every 10,000 mi

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 12,000 mi or 3 years

1 item

Replace points and condenser

Ignition and electrics

Guideline

Every 12,400 mi

1 item

Decarbonize head, grind / lap valves (top-end decoke)

Engine

Factory

Manual: Exhaust and cylinder: decarbonize head and piston. Factory: Maintenance pp.44-45: Ducati dealer job

Every 15,000 mi or 5 years

1 item

Inspect clutch plates and springs

Primary and gearbox

Guideline

Every 15,000 mi

1 item

Replace brake linings / skim drums (wear based)

Brakes

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 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

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.

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