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Honda · Overhead-cam four-stroke single, wet sump, separate gearbox oil, CVT belt drive

Forza 125

Library entry covers 2015-2023

29 factory 34 guideline

Published source

Honda NSS125AD Owner's Manual 32K40L300 (English), Maintenance Schedule pp.75-76

Factory owner's handbook. Covers NSS125AD Forza 125; 2021 EU owner's manual 32K40L300.

63 items for a 2019 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: Liquid cooled
Primary drive: Gear or chain inside engine, shares engine oil
Gearbox oil: Separate gearbox oil
Clutch control: Automatic or semi-automatic
Final drive: Belt CVT, scooter automatic
Front suspension: Telescopic fork
Rear suspension: Swingarm, twin shocks
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Cast / alloy, tubeless
Sidecar: No sidecar

Maintenance schedule

2019 Honda Forza 125

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

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

1 item

Check coolant level

Pre-ride / on the road

Guideline

Every 5,000 km or 12 months

4 items

Adjust automatic / semi-automatic clutch

Primary and gearbox

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
Check wheel bearings for play

Wheels and tires

Guideline

Every 6,000 km or 12 months

11 items

Change engine oil

Engine

Factory

Manual: Engine oil (replace). Factory: Replace at 1000 km initial, then every 6000 km; annual check
Engine idle speed (inspect)

Engine

Factory

Factory: Every 6000 km; annual check
Headlight Aim

Engine

Factory

Factory: Maintenance schedule pp.72-73 of the German edition (Wartungsplan; columns pre-ride check, 1, 6, 12, 18, 24, 30, 36 x 1,000 km / 0.6, 4, 8, 12, 16, 20, 24 x 1,000 mi, annual check; note 1: at higher odometer readings repeat at the intervals given): Scheinwerfereinstellung, I at 6, 12, 18, 24, 30 and 36 x 1,000 km and at the annual check. (Read from the page images, ManualsLib.de Honda NSS125AD (Forza 125) German owner's manual pp.72-73; this edition prints no evaporative emission row.)
Check throttle cable(s) free play and return

Fuel and air

Factory

Manual: Throttle operation (inspect). Factory: Every 6000 km; annual check
Replace fuel lines

Fuel and air

Factory

Manual: Fuel line (inspect). Factory: Every 6000 km; annual check
Battery (inspect)

Ignition and electrics

Factory

Factory: Every 6000 km
Grease and check center / side stand and springs

Rear suspension and frame

Factory

Manual: Side stand (inspect). Factory: Every 6000 km; annual check
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Suspension (inspect). Factory: Every 6000 km; annual check
Brake System

Brakes

Factory

Factory: Maintenance schedule pp.72-73 of the German edition (Wartungsplan; columns pre-ride check, 1, 6, 12, 18, 24, 30, 36 x 1,000 km / 0.6, 4, 8, 12, 16, 20, 24 x 1,000 mi, annual check; note 1: at higher odometer readings repeat at the intervals given): Bremsanlage, I at 6, 12, 18, 24, 30 and 36 x 1,000 km and at the annual check. (Read from the page images, ManualsLib.de Honda NSS125AD (Forza 125) German owner's manual pp.72-73; this edition prints no evaporative emission row.)
Check brake pads and discs

Brakes

Factory

Manual: Brake pads wear (inspect). Factory: Every 6000 km; annual check
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Wheels/tires (inspect). Factory: Every 6000 km; pre-ride check

Every 6,000 km

2 items

Check and adjust valve clearances

Engine

Factory

Manual: Valve clearance (inspect). Factory: Every 6000 km; dealer item
Check engine breather and oil return

Engine

Factory

Manual: Crankcase breather (clean). Factory: Clean every 6000 km; more often in rain or at full throttle

Every 6,500 km or 12 months

2 items

Inspect, clean and gap spark plugs

Engine

Guideline
Inspect CVT drive belt, rollers / sliders and clutch shoes

Final drive

Guideline

Typical scooter interval. Your owner's manual figure governs; check belt width against the service limit.

Every 8,000 km or 12 months

1 item

Replace oil filter

Engine

Guideline

Every 9,500 km or 12 months

6 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
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

4 items

Cooling System

Engine

Factory

Factory: Maintenance schedule pp.72-73 of the German edition (Wartungsplan; columns pre-ride check, 1, 6, 12, 18, 24, 30, 36 x 1,000 km / 0.6, 4, 8, 12, 16, 20, 24 x 1,000 mi, annual check; note 1: at higher odometer readings repeat at the intervals given): Kuehlsystem, I at 12, 24 and 36 x 1,000 km and at the annual check. (Read from the page images, ManualsLib.de Honda NSS125AD (Forza 125) German owner's manual pp.72-73; this edition prints no evaporative emission row.)
Nuts, Bolts, Fasteners

Engine

Factory

Factory: Maintenance schedule pp.72-73 of the German edition (Wartungsplan; columns pre-ride check, 1, 6, 12, 18, 24, 30, 36 x 1,000 km / 0.6, 4, 8, 12, 16, 20, 24 x 1,000 mi, annual check; note 1: at higher odometer readings repeat at the intervals given): Muttern, Schrauben, Befestigungsteile, I at 12, 24 and 36 x 1,000 km and at the annual check. (Read from the page images, ManualsLib.de Honda NSS125AD (Forza 125) German owner's manual pp.72-73; this edition prints no evaporative emission row.)
Radiator coolant (inspect)

Engine

Factory

Factory: pre-ride check, I at 12, 24, 36 x1,000 km and annual check; replace every 3 years (Maintenance schedule p.75, NSS125AD English edition rendered from the Honda PDF in the browser; columns 1, 6, 12, 18, 24, 30, 36 x1,000 km (0.6, 4, 8, 12, 16, 20, 24 x1,000 mi))
Check steering head bearing adjustment

Front end

Factory

Manual: Steering head bearings (inspect). Factory: Every 12000 km; annual check; dealer item

Every 12,000 km

4 items

Clean oil strainers / mesh screens

Engine

Factory

Manual: Engine oil strainer screen (clean). Factory: Clean at 12000, 24000, 36000 km
Drive belt (inspect)

Engine

Factory

Factory: I at 12 and 36 x1,000 km; replace at 24 x1,000 km (Maintenance schedule p.75, NSS125AD English edition rendered from the Honda PDF in the browser; columns 1, 6, 12, 18, 24, 30, 36 x1,000 km (0.6, 4, 8, 12, 16, 20, 24 x1,000 mi))
Replace spark plugs

Engine

Factory

Manual: Spark plug (replace). Factory: Inspect at 6000/18000/30000 km, replace at 12000/24000/36000 km
Clutch shoes wear (inspect)

Primary and gearbox

Factory

Factory: Every 12000 km; dealer item

Every 16,000 km or 2 years

2 items

Compression test (or leak-down)

Engine

Guideline
Change gearbox oil

Primary and gearbox

Guideline

Every 18,000 km

2 items

Replace air filter element

Fuel and air

Factory

Manual: Air cleaner (replace). Factory: Replace at 18000 and 36000 km; sooner in wet or dusty areas
Evaporative Emission Control System (inspect)

Controls and cables

Factory

Factory: I at 18 and 36 x1,000 km (Maintenance schedule p.75, NSS125AD English edition rendered from the Honda PDF in the browser; columns 1, 6, 12, 18, 24, 30, 36 x1,000 km (0.6, 4, 8, 12, 16, 20, 24 x1,000 mi))

Every 19,500 km or 2 years

2 items

Synchronize throttle bodies

Fuel and air

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 19,500 km or 3 years

1 item

Replace CVT drive belt

Final drive

Guideline

Typical scooter interval, or sooner if the belt is cracked, glazed or below its width limit.

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

1 item

Replace drive belt (wear or damage based)

Final drive

Factory

Manual: Drive belt (replace). Factory: Inspect at 12000 and 36000 km, replace at 24000 km; dealer item

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
Change final drive (rear drive) oil

Final drive

Factory

Manual: Final drive oil (replace). Factory: Every 2 years; replacement requires mechanical skill
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Replace brake fluid

Brakes

Factory

Manual: Brake fluid (replace). Factory: Every 2 years; check level every 6000 km and pre-ride

Every 3 years

1 item

Replace coolant

Engine

Factory

Manual: Radiator coolant (replace). Factory: Every 3 years; inspect every 12000 km, annually and pre-ride

Every 4 years

2 items

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

No interval set

2 items

Lights/Horn (pre-ride check)

Engine

Factory

Factory: Maintenance schedule pp.72-73 of the German edition (Wartungsplan; columns pre-ride check, 1, 6, 12, 18, 24, 30, 36 x 1,000 km / 0.6, 4, 8, 12, 16, 20, 24 x 1,000 mi, annual check; note 1: at higher odometer readings repeat at the intervals given): Beleuchtung/Hupe, I in the pre-ride check column only. (Read from the page images, ManualsLib.de Honda NSS125AD (Forza 125) German owner's manual pp.72-73; this edition prints no evaporative emission row.)
Fuel Level (pre-ride check)

Fuel and air

Factory

Factory: Maintenance schedule pp.72-73 of the German edition (Wartungsplan; columns pre-ride check, 1, 6, 12, 18, 24, 30, 36 x 1,000 km / 0.6, 4, 8, 12, 16, 20, 24 x 1,000 mi, annual check; note 1: at higher odometer readings repeat at the intervals given): Kraftstoffstand, I in the pre-ride check column only. (Read from the page images, ManualsLib.de Honda NSS125AD (Forza 125) German owner's manual pp.72-73; this edition prints no evaporative emission row.)

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.