Honda Grom / MSX125 — Example photo: big-ashb, CC BY 2.0, Wikimedia Commons

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Honda · Overhead-cam four-stroke single, wet sump, gearbox shares engine oil, chain drive

Grom / MSX125

Library entry covers 2013-2026

36 factory 41 guideline

Published source

Honda MSX125 Owner's Manual 2013, Maintenance Schedule pp.35-36

Factory owner's handbook. Covers 2013 (MSX125, Thai-market manual).

77 items for a 2016 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, screw/locknut adjusters
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Fuel injection
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, single shock / cantilever
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

2016 Honda Grom / MSX125

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. Factory: Every 500 km (300 mi): I L

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 4,000 km or 12 months

14 items

Change engine oil

Engine

Factory

Manual: Engine Oil. Factory: R every column incl. initial, and annual
Check engine breather and oil return

Engine

Factory

Manual: Crankcase Breather (clean). Factory: C every column after initial and annual
Engine Idle Speed

Engine

Factory

Factory: As printed: I at 1 (0.6 mi), 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check
Headlight Aim

Engine

Factory

Factory: As printed: I at 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check
Suspension

Engine

Factory

Factory: As printed: I at 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check
Throttle Operation

Engine

Factory

Factory: As printed: I at 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check; also Pre-ride Check
Fuel Line

Fuel and air

Factory

Factory: As printed: I at 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Factory

Manual: Clutch System. Factory: I every column incl. initial and annual
Side Stand

Rear suspension and frame

Factory

Factory: As printed: I at 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check; also Pre-ride Check
Brake Fluid (inspect)

Brakes

Factory

Factory: Maintenance schedule pp.35-36 (archive.org PDF pages 38-39, re-read from the page images; columns 1, 4, 8, 12, 16, 20, 24 x1,000 km (0.6, 2.5, 5, 7.5, 10, 12.5, 15 x1,000 mi), annual check): I at 4 to 24 x1,000 km and annual check; replace every 2 years
Brake Light Switch

Brakes

Factory

Factory: As printed: I at 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check
Brake Pads Wear

Brakes

Factory

Factory: As printed: I at 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check; also Pre-ride Check
Brake System

Brakes

Factory

Factory: As printed: I at 1 (0.6 mi), 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check
Wheels/Tires

Wheels and tires

Factory

Factory: As printed: I at 4, 8, 12, 16, 20, 24 (x 1,000 km) / 2.5 ... 15 (x 1,000 mi) and Annual Check; also Pre-ride Check

Every 4,000 km

1 item

Check and adjust valve clearances

Engine

Factory

Manual: Valve Clearance. Factory: I every column incl. initial

Every 5,000 km or 12 months

10 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 spoke tension and wheel true

Wheels and tires

Guideline
Check wheel bearings for play

Wheels and tires

Guideline

Every 8,000 km or 12 months

2 items

Nuts, Bolts, Fasteners

Engine

Factory

Factory: As printed: I at 1, 8, 16, 24 (x 1,000 km) / 0.6, 5, 10, 15 (x 1,000 mi) and Annual Check
Replace oil filter

Engine

Guideline

Every 8,000 km

2 items

Inspect, clean and gap spark plugs

Engine

Factory

Manual: Spark Plug (inspect). Factory: I at 4, 12, 20 (x1000km)
Replace spark plugs

Engine

Factory

Manual: Spark Plug (replace). Factory: R at 8, 16, 24 (x1000km)

Every 9,500 km or 12 months

6 items

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 12,000 km or 12 months

1 item

Steering Head Bearings

Front end

Factory

Factory: As printed: I at 1, 12, 24 (x 1,000 km) / 0.6, 7.5, 15 (x 1,000 mi) and Annual Check

Every 12,000 km

2 items

Clean centrifugal oil filter (rotor / slinger)

Engine

Factory

Manual: Engine Oil Centrifugal Filter (clean). Factory: C at 12 and 24 (x1000km)
Clean oil strainers / mesh screens

Engine

Factory

Manual: Engine Oil Strainer Screen (clean). Factory: C at 12 and 24 (x1000km)

Every 16,000 km or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 16,000 km

1 item

Replace air filter element

Fuel and air

Factory

Manual: Air Cleaner. Factory: R at 16 (x1000km) only; Cols x1000km 1/4/8/12/16/20/24 (x1000mi 0.6/2.5/5/7.5/10/12.5/15) plus annual

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 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 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 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 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

4 items

Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Brake Fluid *4 (regular replace)

Brakes

Factory

Factory: As printed: Regular Replace: 2 Years; *4: Replacement requires mechanical skill.
Replace brake fluid

Brakes

Factory

Manual: Brake Fluid. Factory: Regular replace 2 Years

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

No interval set

11 items

Engine Oil (pre-ride check)

Engine

Factory

Factory: As printed: I: Pre-ride Check (P. 37)
Engine Stop Switch

Engine

Factory

Factory: Maintenance schedule pp.35-36 (archive.org PDF pages 38-39, re-read from the page images; columns 1, 4, 8, 12, 16, 20, 24 x1,000 km (0.6, 2.5, 5, 7.5, 10, 12.5, 15 x1,000 mi), annual check): pre-ride check
Lights/Horn

Engine

Factory

Factory: Maintenance schedule pp.35-36 (archive.org PDF pages 38-39, re-read from the page images; columns 1, 4, 8, 12, 16, 20, 24 x1,000 km (0.6, 2.5, 5, 7.5, 10, 12.5, 15 x1,000 mi), annual check): pre-ride check
Throttle Operation (pre-ride check)

Engine

Factory

Factory: Maintenance schedule pp.35-36 (archive.org PDF pages 38-39, re-read from the page images; columns 1, 4, 8, 12, 16, 20, 24 x1,000 km (0.6, 2.5, 5, 7.5, 10, 12.5, 15 x1,000 mi), annual check): pre-ride check
Fuel Level

Fuel and air

Factory

Factory: Maintenance schedule pp.35-36 (archive.org PDF pages 38-39, re-read from the page images; columns 1, 4, 8, 12, 16, 20, 24 x1,000 km (0.6, 2.5, 5, 7.5, 10, 12.5, 15 x1,000 mi), annual check): pre-ride check
Clutch System (pre-ride check)

Primary and gearbox

Factory

Factory: As printed: I: Pre-ride Check (P. 37)
Drive Chain (pre-ride check)

Final drive

Factory

Factory: As printed: I: Pre-ride Check (P. 37)
Side Stand (pre-ride check)

Rear suspension and frame

Factory

Factory: Maintenance schedule pp.35-36 (archive.org PDF pages 38-39, re-read from the page images; columns 1, 4, 8, 12, 16, 20, 24 x1,000 km (0.6, 2.5, 5, 7.5, 10, 12.5, 15 x1,000 mi), annual check): pre-ride check
Brake Fluid *4 (pre-ride check)

Brakes

Factory

Factory: As printed: I: Pre-ride Check (P. 37)
Brake Pads Wear (pre-ride check)

Brakes

Factory

Factory: Maintenance schedule pp.35-36 (archive.org PDF pages 38-39, re-read from the page images; columns 1, 4, 8, 12, 16, 20, 24 x1,000 km (0.6, 2.5, 5, 7.5, 10, 12.5, 15 x1,000 mi), annual check): pre-ride check
Wheels/Tires (pre-ride check)

Wheels and tires

Factory

Factory: Maintenance schedule pp.35-36 (archive.org PDF pages 38-39, re-read from the page images; columns 1, 4, 8, 12, 16, 20, 24 x1,000 km (0.6, 2.5, 5, 7.5, 10, 12.5, 15 x1,000 mi), annual check): pre-ride check

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.