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Honda · Two-stroke triple, oil injection, chain drive

NS 400

Library entry covers 1985-1987

28 factory 54 guideline

Published source

Honda NS400R owner's manual, maintenance schedule printed pp.116-117 (ManualsLib 922836 pp.122-123)

Factory owner's handbook. Covers Honda NS400R owner's manual; no edition year seen.

82 items for a 1985 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: 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, single shock / cantilever
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Cast / alloy, tubeless
Sidecar: No sidecar

Maintenance schedule

1985 Honda NS 400

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

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

Check coolant level

Pre-ride / on the road

Guideline

On the road: every 1,000 km

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

Every 1,000 km

1 item

Drive chain (inspect, lubricate)

Final drive

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I, L every 1,000 km (600 mi).

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

1 item

Inspect tire tread, sidewalls and date codes

Wheels and tires

Guideline

Every 3,000 km or 12 months

1 item

Replace spark plugs (two-stroke)

Engine

Guideline

Every 3,000 km

1 item

Spark plugs (inspect)

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 3,000 km (1,875 mi).

Every 5,000 km or 12 months

11 items

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
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.
Inspect chain and sprockets for wear (measure stretch)

Final drive

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 brake pads and discs

Brakes

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 6,000 km

7 items

Spark plugs (replace)

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. R every 6,000 km (3,750 mi).
Air cleaner (clean) *

Fuel and air

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. C every 6,000 km (3,750 mi); note 1: more often in dusty areas.
Carburetor idle speed (inspect) *

Fuel and air

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I at 1,000 km, then every 6,000 km (3,750 mi).
Fuel strainer screen (clean) *

Fuel and air

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. C every 6,000 km (3,750 mi).
Clutch system (inspect)

Primary and gearbox

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 6,000 km from 12,000 km as printed; one cell is under the site watermark.
Brake fluid (inspect)

Brakes

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I at 6,000, 12,000, 24,000 and 30,000 km.
Brake pad wear (inspect)

Brakes

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 6,000 km (3,750 mi).

Every 6,500 km or 12 months

3 items

Check / bleed / adjust oil injection pump cable

Engine

Guideline
Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline

Every 9,500 km or 12 months

7 items

Inspect coolant hoses and clamps

Engine

Guideline
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 control cables and lever pivots

Controls and cables

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

1 item

Change gearbox oil

Primary and gearbox

Guideline

Every 12,000 km

16 items

Cooling system (inspect) *

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).
Headlight aim (inspect) *

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).
Nuts, bolts, fasteners (inspect) **

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I at 1,000 km, then every 12,000 km (7,500 mi).
Oil pump and oil lines (inspect) **

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).
Radiator coolant (inspect)

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I at 12,000 and 24,000 km.
Suspension (inspect) *

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).
Throttle operation (inspect) *

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).
Carburetor choke (inspect) *

Fuel and air

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).
Carburetor synchronization (inspect) *

Fuel and air

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I at 1,000 km, then every 12,000 km (7,500 mi).
Decarbonizing **

Fuel and air

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. C every 12,000 km (7,500 mi).
Fuel lines (inspect) *

Fuel and air

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).
Steering head bearing (inspect) **

Front end

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I at 1,000 km, then every 12,000 km (7,500 mi).
Side stand (inspect)

Rear suspension and frame

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).
Brake light switch (inspect) *

Brakes

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).
Brake system (inspect)

Brakes

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I at 1,000 km, then every 12,000 km (7,500 mi).
Wheels (inspect) **

Wheels and tires

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. I every 12,000 km (7,500 mi).

Every 13,000 km or 2 years

1 item

Replace spark plugs

Engine

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 18,000 km or 2 years

1 item

Brake fluid (replace)

Brakes

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. R every 2 years; R marked at 18,000 and 36,000 km.

Every 18,000 km

1 item

Transmission oil (replace)

Primary and gearbox

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. R every 18,000 km (11,250 mi).

Every 19,500 km 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 29,000 km

1 item

Replace chain and sprockets (wear based)

Final drive

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 36,000 km or 2 years

1 item

Radiator coolant (replace)

Engine

Factory

Factory: Maintenance schedule (Honda NS400R owner's manual, printed pp.116-117; odometer reading whichever comes first: 1,000 km (600 mi), 6,000 km (3,750 mi), 12,000 (7,500), 18,000 (11,250), 24,000 (15,000), 30,000 (18,750), 36,000 km (22,500 mi); note 2: at higher readings repeat at the interval shown). Codes: I inspect and clean, adjust, lubricate or replace if necessary; C clean; R replace; A adjust; L lubricate. * dealer item unless mechanically qualified; ** dealer item for safety. R every 2 years; R marked at 36,000 km.

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

4 items

Replace coolant

Engine

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

Guideline

Every 4 years

4 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.
Inspect brake hoses; replace old rubber

Brakes

Guideline
Rebuild calipers and master cylinders (seals)

Brakes

Guideline

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.