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Honda · Honda two-stroke (Elsinore CR / MT / MR 1973-1984)

CR 250

Library entry covers 1981-2007, Liquid-cooled

33 factory 49 guideline

Published source

Honda 2007 CR250R Owner's Manual & Competition Handbook, Maintenance Schedule p.21 (manual page 26 of 149)

Factory owner's handbook. Covers 2007 CR250R owner's manual; chart columns are races, with the hours printed in the column headers.

82 items for a 1984 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: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Single carburetor
Cooling: Liquid 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: Disc, hydraulic
Rear brake: Drum (or band / belt rim)
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

1984 Honda CR 250

On the road: every 200 km

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 500 km

2 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline

On the road: every 800 km

2 items

Check coolant level

Pre-ride / on the road

Guideline
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

On the road: every 2.5 h

1 item

Lubricate drive chain

Pre-ride / on the road

Factory

Manual: Drive Chain (inspect, lubricate). Factory: I, L each race (about 2.5 hours).

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

2 items

Check gearbox oil level

Primary and gearbox

Guideline
Adjust rear drum brake and rod / cable linkage

Brakes

Guideline

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

Replace spark plugs (two-stroke)

Engine

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline
Lubricate control cables and lever pivots

Controls and cables

Guideline

Every 5,000 km or 12 months

10 items

Check engine mounting bolts and plates

Engine

Guideline
Clean fuel tap filter / sediment bowl

Fuel and air

Guideline
Adjust clutch pushrod / clutch adjuster

Primary and gearbox

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

Final drive

Guideline
Check steering damper (friction or hydraulic)

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 5,000 km 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 6,500 km or 12 months

1 item

Lubricate brake cam spindles, check linings and drums

Brakes

Guideline

Every 9,500 km 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 16,000 km or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 19,500 km or 2 years

1 item

Replace air filter element

Fuel and air

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 2.5 h

18 items

Driven Sprocket (inspect)

Engine

Factory

Factory: I each race (about 2.5 hours).
Expansion Chamber/Muffler (inspect)

Engine

Factory

Factory: I each race (about 2.5 hours).
Inspect coolant hoses and clamps

Engine

Factory

Manual: Cooling System (inspect). Factory: I each race (about 2.5 hours).
Inspect, clean and gap spark plugs

Engine

Factory

Manual: Spark Plug (inspect). Factory: I each race (about 2.5 hours).
Nuts, Bolts, Fasteners (inspect)

Engine

Factory

Factory: I each race (about 2.5 hours).
Radiator Coolant (inspect)

Engine

Factory

Factory: I each race (about 2.5 hours). Note 2: Replace every 2 years. Replacement requires mechanical skill.
Check throttle cable(s) free play and return

Fuel and air

Factory

Manual: Throttle Operation (inspect). Factory: I each race (about 2.5 hours).
Clean / inspect air filter

Fuel and air

Factory

Manual: Air Cleaner (clean). Factory: C each race (about 2.5 hours). Note 1: Clean after every moto for dusty riding conditions.
Clutch System (inspect)

Primary and gearbox

Factory

Factory: I each race (about 2.5 hours).
Drive Chain Rollers (inspect)

Final drive

Factory

Factory: I each race (about 2.5 hours).
Drive Chain Sliders (inspect)

Final drive

Factory

Factory: I each race (about 2.5 hours).
Inspect chain and sprockets for wear (measure stretch)

Final drive

Factory

Manual: Drive Sprocket (inspect). Factory: I each race (about 2.5 hours).
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Suspension (inspect). Factory: I each race (about 2.5 hours).
Brake Fluid (inspect)

Brakes

Factory

Factory: I each race (about 2.5 hours). Note 2: Replace every 2 years. Replacement requires mechanical skill.
Brake System (inspect)

Brakes

Factory

Factory: I each race (about 2.5 hours).
Check brake pads and discs

Brakes

Factory

Manual: Brake Pad Wear (inspect). Factory: I each race (about 2.5 hours).
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Wheels/Tires (inspect). Factory: I each race (about 2.5 hours).
Control Cables (inspect, lubricate)

Controls and cables

Factory

Factory: I, L each race (about 2.5 hours).

Every 7.5 h

9 items

Piston and Piston Ring (replace)

Engine

Factory

Factory: R every 3 races (about 7.5 hours).
Reed Valve Only (replace)

Engine

Factory

Factory: R every 3 races (about 7.5 hours).
Replace spark plugs

Engine

Factory

Manual: Spark Plug (replace). Factory: R every 3 races (about 7.5 hours).
Cylinder Head Decarbonizing (clean)

Fuel and air

Factory

Factory: C every 3 races (about 7.5 hours).
Exhaust Valve and Linkage Decarbonizing (clean)

Fuel and air

Factory

Factory: C every 3 races (about 7.5 hours).
Change gearbox oil

Primary and gearbox

Factory

Manual: Transmission Oil (replace). Factory: R every 3 races (about 7.5 hours).
Replace chain and sprockets (wear based)

Final drive

Factory

Manual: Drive Chain (replace). Factory: R every 3 races (about 7.5 hours).
Change fork oil

Front end

Factory

Manual: Fork Oil, Fork Tube/Slider (replace). Factory: R every 3 races (about 7.5 hours). Note 3: Replace after the first break-in ride.
Clean and grease rear suspension linkage

Rear suspension and frame

Factory

Manual: Swingarm/Shock Linkage (lubricate). Factory: L every 3 races (about 7.5 hours).

Every 22.5 h

3 items

Piston Pin and Connecting Rod Small End Bearing (replace)

Engine

Factory

Factory: R every 9 races (about 22.5 hours).
Check steering head bearing adjustment

Front end

Factory

Manual: Steering Head Bearing (inspect). Factory: I every 9 races (about 22.5 hours).
Fork Oil, Damper (replace)

Front end

Factory

Factory: R every 9 races (about 22.5 hours).

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

5 items

Replace coolant

Engine

Factory

Manual: Radiator Coolant (replace). Factory: Note 2: Replace every 2 years. Replacement requires mechanical skill.
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
Replace brake fluid

Brakes

Factory

Manual: Brake Fluid (replace). Factory: Note 2: Replace every 2 years. Replacement requires mechanical skill.

Every 4 years

3 items

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.
Inspect brake hoses; replace old rubber

Brakes

Guideline
Rebuild calipers and master cylinders (seals)

Brakes

Guideline

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.