Honda MONKEY Z 125 (2018–2021) — Specs

Identity

Manufacturer: Honda

Model: MONKEY Z 125

Category: Motorcycle

Type: Motorcycle

Years: 2018 → 2021

Engine

Displacement (cc): 125

Cylinders: 1

Power (hp): 9.4

Power (kW): 6.9

Torque (Nm): 11

Dimensions

Overall length: 1710 mm

Overall width: 755 mm

Overall height: 1030 mm

Wheelbase: 1200 mm

Ground clearance: 180 mm

Weight (kg): 107

Seat height (mm): 776

Tank (L): 5.6

Tires

Front tire: 120/80-12

Rear tire: 130/80-12

Front pressure (bar): 2

Rear pressure (bar): 2

Drivetrain

Drive chain: 420 chain, 98 links

Sprockets (front / rear): 15 / 34

Ignition

Spark plug: NGK CPR6EA-9

Plug gap: 0.8-0.9 mm

Fluids & Filters

Engine oil: SAE10W-30, API SG

Engine oil (without filter, L): 0.9

Oil filter: Hiflofiltro HF117

Air filter: Hiflofiltro HFA1112

Brake fluid: DOT 4

Fuel consumption

Estimated range: ~186 km on a full tank (5.6 L)

Service

Battery: YTX4L-BS

Service interval (km): 6000

Service interval (months): 12

Valve check (km): 12000

Parts and consumables for this motorcycle

Data is gathered with care, but without guarantee. Always confirm critical information with your dealer or workshop.

Service notes

Service interval: every 6,000 km or 12 months, whichever comes first. Valve clearance check every 12,000 km. Valve clearance — intake cold 0.08-0.12 mm, exhaust cold 0.15-0.19 mm. Engine oil: oil grade SAE10W-30, API SG, 0.9 L without filter change. Spark plug: NGK CPR6EA-9 (gap 0.8-0.9 mm). Brake fluid: DOT 4. Chain: 98 links, sprockets 15/34 teeth. Tire pressure: front 2 bar, rear 2 bar (cold). Tire size: front 120/80-12, rear 130/80-12. Always confirm critical values with the workshop manual or an authorised dealer.

OEM and quality aftermarket parts that fit this bike. Always confirm with your dealer before ordering.

Engine oil

Spec: SAE 10W-30, 0.9 L (with filter)

OEM OEM recommended engine oil (SAE 10W-30)
Premium Motul 7100 4T (100% Synthetic, Ester)
Premium Motul 5100 4T Technosynthese (Semi-Synthetic)

Which Motul for this bike?

	Motul 7100 4T ✓	Motul 5100 4T
Product	Motul 7100 4T — 100% fully synthetic	Motul 5100 4T — semi-synthetic
Best for	Sport, Naked, Adventure (600cc+), track	Standard, Cruiser, Scooter, daily use
RPM protection	Excellent — ester base, stable under load	Good — for normal riding conditions

Standard Repsol Moto Racing 4T (Synthetic)
Standard Elf Moto 4 Tech (Semi-Synthetic)

Fully Synthetic vs Semi-Synthetic

	Fully Synthetic	Semi-Synthetic
Base oil	100% chemical synthesis (ester or PAO)	Mineral oil + synthetic additives
Heat resistance	Excellent — stable at extreme heat & RPM	Good — suitable for normal temperatures
Cold start	Better — reaches engine faster when cold	Good — adequate for normal climates
Change interval	Longer (up to 10,000 km)	Shorter (5,000–7,000 km typical)
Price	Higher	Lower

Oil filter

Spec: Hiflofiltro HF117

Premium Hiflofiltro HF117
Premium K&N KN-117

Air filter

Spec: Hiflofiltro HFA1112

Standard Hiflofiltro HFA1112

Spark plug

Spec: NGK CPR7EA-9, gap 0.8-0.9 mm

OEM NGK CPR7EA-9
Premium NGK CPR7EAIX-9
Standard NGK CPR7EA-9

Front brake pads

Spec: OEM front pad (EBC equivalent: FA85HH)

Premium EBC FA85HH
Standard EBC FA85 (organic)

Rear brake pads

Spec: OEM rear pad (EBC equivalent: FA85HH)

Premium EBC FA85HH
Standard EBC FA85 (organic)

Drive chain

Spec: 98 links | Sprockets 15/34 teeth / 98 links

Front tire

Spec: 120/80-12, 2.0 bar

OEM OEM 120/80-12

Rear tire

Spec: 130/80-12, 2.0 bar

OEM OEM 130/80-12

Battery

Spec: OEM battery: Yuasa YTX4L-BS

Premium Yuasa YTX7L-BS or YTX7A-BS (typical 125-250cc)

Brake fluid

Spec: DOT 4

Standard TotalEnergies HBF4

Coolant

Service interval

Spec: 6 000 km / 12 months

OEM Engine oil + oil filter change
OEM Air filter inspection
OEM Spark plug check
OEM Brake fluid replacement: every 2 years

Valve check

Spec: 12 000 km

OEM Intake clearance: cold 0.08-0.12 mm
OEM Exhaust clearance: cold 0.15-0.19 mm

Suspension

Spec: telescopic fork / 216 ml SAE 10W

OEM Fork: telescopic fork
OEM Fork oil grade: 216 ml SAE 10W