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Bajaj · Shim-adjusted overhead-cam four-stroke, wet sump, gearbox shares engine oil, chain drive

Dominar 400

Library entry covers 2017-2026

53 factory 44 guideline

Published source

Bajaj Dominar 400 BS VI Owner's Manual, Doc. No. 71120238, Rev. 01, July 2025

Factory owner's handbook. Covers Dominar 400 BS VI manual, Rev. 01, July 2025.

97 items for a 2021 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: Replaceable cartridge or spin-on filter
Valve gear: Overhead cam, shim adjusted (incl. desmo)
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Fuel injection
Cooling: Liquid 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, single shock / cantilever
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Cast / alloy, tubeless
Sidecar: No sidecar

Maintenance schedule

2021 Bajaj Dominar 400

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

Factory

Manual: Drive chain (OKS chain lube spray). Factory: Owner spray every 500 km.

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 1,600 km or 6 months

1 item

Inspect tire tread, sidewalls and date codes

Wheels and tires

Guideline

Every 5,000 km or 12 months

9 items

Check throttle cable(s) free play and return

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

29 items

Check all bulbs / switches working

Engine

Factory

Factory: C,A at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Check fault code, clear fault history, update hex file

Engine

Factory

Factory: C at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Coolant level in expansion tank / hose clamp adjustment

Engine

Factory

Factory: C,A at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
EVAP system hoses: check for cracks

Engine

Factory

Factory: C,R at every service from 5,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Engine breather tube for cracks

Engine

Factory

Factory: C,R at every service from 10,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Fairing and windshield well nuts for rubber cracks

Engine

Factory

Factory: C,R at every service from 10,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
HT coil connections

Engine

Factory

Factory: C,T at every service from 5,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Headlight focus adjustment

Engine

Factory

Factory: C,A at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Mirror position and joint firmness

Engine

Factory

Factory: C,A at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Muffler drain hole cleaning

Engine

Factory

Factory: CL at every service from 10,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Radiator fins (check)

Engine

Factory

Factory: C,R at every service from 5,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Servicing with water wash

Engine

Factory

Factory: Ticked at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Starter motor and starter relay connections

Engine

Factory

Factory: C,T at every service from 5,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Step-pillion LH and RH, ball and plate (clean, lubricate)

Engine

Factory

Factory: CL,L at every service from 5,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Throttle body rubber duct (sleeve) for hardness / loose fitment

Engine

Factory

Factory: C,R at every service from 15,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
USB socket charger (check)

Engine

Factory

Factory: C,R at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Wiring harness connections, routing and conduit / PVC sleeve inspection

Engine

Factory

Factory: C,A,T at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Battery connections and health by load tester; +ve terminal cap fitment

Ignition and electrics

Factory

Factory: C,A,L,T at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Ignition switch contacts cleaning

Ignition and electrics

Factory

Factory: CL,L at every service from 10,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Oil pressure indicator check on console after ignition ON

Ignition and electrics

Factory

Factory: C,R at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Clutch cable free play

Primary and gearbox

Factory

Factory: C,A at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
General lubrication: clutch lever

Primary and gearbox

Factory

Factory: L at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Sealed drive chain: clean, lubricate and adjust

Final drive

Factory

Factory: CL,L,A at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Front fork oil and seal (check)

Front end

Factory

Factory: C,R at every service; replace oil, oil seal and dust seal every 30,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Steering play (check and adjust)

Front end

Factory

Factory: C,A at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
All fasteners tightness (axles, swing arm axle, engine foundation, footrests, pillion stay)

Rear suspension and frame

Factory

Factory: C,T at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Brake pads, front and rear, for wear limit

Brakes

Factory

Factory: C,R at every service (500-750 km, then every 5,000 km); R at 15,000 km steps Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Brake system leakage, brake hose condition and fluid level

Brakes

Factory

Factory: C,A,R at every service; replace DOT 4 brake oil and master / caliper seals every 30,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Tire air pressure (check and adjust)

Wheels and tires

Factory

Factory: C,A at every service (500-750 km, then every 5,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)

Every 6,500 km or 12 months

2 items

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 / 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.
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 10,000 km

9 items

Change engine oil

Engine

Factory

Manual: Engine oil. Factory: Replace at 1st (500-750 km) then every 10,000 km; top up every 5,000 km.
Drain tube cleaning.

Engine

Factory

Factory: As printed: Remarks: Clean drain tube at every 10,000 Kms.
Engine oil strainer and evacuation oil strainer (clean)

Engine

Factory

Factory: CL at 1st service, then every 10,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Rear sprocket fasteners for looseness

Engine

Factory

Factory: C,T at 1st service, then every 10,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Replace oil filter

Engine

Factory

Manual: Engine oil filter. Factory: Replace at 1st service and every 10,000 km.
Spark plug (clean and check gap)

Engine

Factory

Factory: CL,A at 10,000 and 20,000 km; replaced at 30,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Air cleaner drain tube cleaning

Fuel and air

Factory

Factory: Remarks: clean drain tube at every 10,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Steering stem bearing and cap steering bearing (check, clean, lubricate)

Front end

Factory

Factory: C,CL,L at 10,000, 20,000, 30,000 km and every 10,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Rear wheel rubber shock dampers for excess play

Wheels and tires

Factory

Factory: C,R every 10,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)

Every 16,000 km or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 19,500 km or 2 years

3 items

Synchronize throttle bodies

Fuel and air

Guideline
Clean and grease rear suspension linkage

Rear suspension and frame

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 20,000 km

4 items

Valve tappet clearance (check and adjust)

Engine

Factory

Factory: C,A at 20,000, 40,000, 60,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Air cleaner element and air filter cover O-ring (replace)

Fuel and air

Factory

Factory: R at 20,000 and 40,000 km (replace viscous filter every 20,000 km) Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Replace air filter element

Fuel and air

Factory

Manual: Viscous filter. Factory: Replace every 20,000 km. Chart columns every 5,000 km.
Side stand pivot pin (check, lubricate)

Rear suspension and frame

Factory

Factory: C,L at 20,000, 40,000, 60,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)

Every 24,000 km 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 24,000 km or 4 years

1 item

Check valve clearances (shim adjusted)

Engine

Guideline

Every 25,500 km or 4 years

1 item

Replace spark plugs

Engine

Guideline

Every 29,000 km

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 30,000 km

6 items

Coolant and radiator hoses (replace)

Engine

Factory

Factory: Replacement at every 30,000 km or 3 years, whichever occurs earlier Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Spark plug (replace)

Engine

Factory

Factory: Remarks: replace at every 30,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Front fork oil, oil seal and dust seal (replace)

Front end

Factory

Factory: Remarks: replace in pair at every 30,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Brake fluid and master cylinder / caliper seals (replace)

Brakes

Factory

Factory: Remarks: replace DOT 4 brake oil and master / caliper seals at every 30,000 km Re-read from Bajaj Dominar 400 owner's manual pp.50-56 (cdn.bajajauto.com)
Rebuild calipers and master cylinders (seals)

Brakes

Factory

Manual: Master cylinder and caliper seals. Factory: Replaced with brake fluid every 30,000 km.
Replace brake fluid

Brakes

Factory

Manual: Brake fluid (DOT 4). Factory: Check/top up each service; replace fluid every 30,000 km.

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 38,500 km or 4 years

1 item

Replace fuel filter

Fuel and air

Guideline

Every 40,000 km or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 40,000 km

3 items

Water pump oil seals (replace)

Engine

Factory

Factory: R at 40,000 km; remarks: replace water pump oil seals at every 40,000 km Re-read from Bajaj Dominar 400 owner's manual pp.52-53 (cdn.bajajauto.com)
Water pump oil seals: replace

Engine

Factory

Factory: Replace every 40,000 km.
Swing arm NRB (lubricate)

Rear suspension and frame

Factory

Factory: As printed: Remarks: Lubricate NRB at every 40,000 Kms. Use AP grease.

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 2 years

3 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

Every 4 years

2 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

Every 6 years

1 item

Replace tires on age (regardless of tread)

Wheels and tires

Guideline

No interval set

1 item

Drive chain wear** (replace)

Final drive

Factory

Factory: As printed: Replace if required

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.