2022 Yamaha YZ125X Specifications

Name: 2022 Yamaha YZ125X
Brand: Yamaha

Enduro / Off-Road • Specs last verified 13 July 2026

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2022 Yamaha YZ125X Overview

Yamaha YZ125X is an enduro / off-road motorcycle, displacing 125 cc. Power comes from a Single cylinder, two-stroke engine, a compression ratio of 8.8:1. Bore and stroke come in at 54 x 54.5 mm. On the road, the 2022 YZ125X tips the scales at 94.8 kg, carries a 8-litre fuel tank, offers a seat height of 975 mm and spans a 1455 mm wheelbase. That's roughly 104 kg lighter than the average enduro / off-road motorcycle in our database. The full 2022 Yamaha YZ125X spec sheet below covers every technical detail, from suspension travel to tyre sizes.

2022 YZ125X - Pros & Cons

Strengths

Factory engineering: Yamaha built the YZ125X around a straightforward, purposeful specification rather than chasing any single standout feature.

Considerations

Carburetor fuelling: Expect to spend more time keeping the carbs in tune, especially after long storage periods or a change in altitude.
Tall seat height: At 975 mm, shorter riders will likely be on tiptoes at a standstill - worth sitting on one before you buy.
Modest fuel capacity: Range between stops is limited by the 8-litre tank - plan fuel stops accordingly on longer routes.
Chain final drive upkeep: Budget time for routine chain maintenance - it's cheap to replace but needs consistent attention to avoid premature sprocket wear.

Wear Points & Servicing Notes

Carburetor maintenance

Carburetors on the YZ125X need periodic attention - pilot jets and float needles are the first parts to gum up after the bike sits, and the first thing to check if idle or throttle response degrades.

Brake disc and pad wear

Braking up front comes from Single disc. Hydraulic. - solid stopping power, with disc and pad wear best checked on the same schedule as tyre changes.

Suspension condition on used examples

The YZ125X's suspension runs KYB® Speed-Sensitive System inverted fork; fully adjustable at the front. The rear uses KYB® single shock; fully adjustable. Fork-seal condition and rear linkage play are the two things worth checking before buying used.

Final drive maintenance

The YZ125X uses chain final drive, which is cheap to replace but needs regular cleaning, lubrication and tension checks to get a full service life out of the sprockets.

Frame & chassis check

Built around a Semi-double cradle aluminium frame, the YZ125X's chassis is straightforward to inspect: look for corrosion, cracks or repair welds around stress points like the head-stock and swingarm mounts.

Low-speed handling

94.8 kg keeps the YZ125X easy to move around in tight spaces, car parks and on the stand alike.

YZ125X - Buying & Maintenance Guide

What to check before buying

Before handing over money for a used 2022 Yamaha YZ125X, cover the fundamentals: service book and oil change history, chain and sprocket wear, and any sign of oil weeping around the casings. Cold-starting it yourself tells you a lot - a healthy YZ125X should catch quickly and settle into a smooth idle.

Oil and filter changes

Nothing protects a YZ125X's engine like disciplined oil changes - stay on the manufacturer's schedule (roughly every 6,000 km or annually). The sump holds 0.70 litres, so budget for that volume of quality motorcycle-specific engine oil. Match the viscosity grade to what the owner's manual specifies, not what's cheapest.

Carburetor upkeep

Deposits in the carbs are the usual culprit behind poor running on a stored YZ125X - strip and clean the float bowls before the first start. Pilot jets clog first and get overlooked most, so make a point of checking them.

2022 Yamaha YZ125X - Frequently Asked Questions

What engine does the 2022 Yamaha YZ125X have?

The 2022 Yamaha YZ125X uses a Single cylinder, two-stroke engine with 125 cc of displacement.

How much does the 2022 Yamaha YZ125X weigh?

The 2022 Yamaha YZ125X weighs 94.8 kg. This is the manufacturer's wet figure.

What is the fuel tank capacity of the 2022 Yamaha YZ125X?

The 2022 Yamaha YZ125X has a 8-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 133-160 km between stops.

Is the 2022 Yamaha YZ125X suitable for shorter riders?

The 2022 Yamaha YZ125X has a seat height of 975 mm. This is towards the tall end of the spectrum and will require most riders under 175 cm to tiptoe at stops.

What brakes does the 2022 Yamaha YZ125X have?

The 2022 Yamaha YZ125X uses Single disc. Hydraulic. at the front and Single disc. Hydraulic. at the rear.

What tyre sizes does the 2022 Yamaha YZ125X use?

The front tyre size on the 2022 Yamaha YZ125X is 90/90-21.

How much oil does the 2022 Yamaha YZ125X take?

The 2022 Yamaha YZ125X takes 0.70 litres of engine oil at a full oil and filter change. Always verify against the dipstick or sight glass after filling.

Yamaha YZ125X Spec Evolution

The Yamaha YZ125X was produced across 5 model years (2017-2023). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	2017	2020	2021	2022	2023
Wet Weight	93.5 kg / 206.1 lbs	94.8 kg / 209.0 lbs	94.8 kg / 209.0 lbs	94.8 kg / 209.0 lbs	96.2 kg / 212.0 lbs
Seat Height	-	975 mm / 38.4 in.	975 mm / 38.4 in.	975 mm / 38.4 in.	970 mm / 38.2 in.
Fuel Capacity	8.00 litres / 2.11 gallons	8.00 litres / 2.11 US gallons	8.00 litres / 2.11 US gallons	8.00 litres / 2.11 US gallons	6.81 litres / 1.80 US gallons
Displacement (cc)	124.00 cc	125.0 cc	125.0 cc	125.0 cc	125.0 cc
Displacement (ci)	7.57 cubic inches	7.63 cubic inches	7.63 cubic inches	7.63 cubic inches	7.63 cubic inches
Oil Capacity (Quarts)	0.05 quarts	0.74 US quarts	0.74 US quarts	0.74 US quarts	0.74 US quarts
Frame Type	Semi-double cradle aluminium frame	Semi-double cradle aluminium frame	Semi-double cradle aluminium frame	Semi-double cradle aluminium frame	Semi-double cradle aluminium
Wheelbase	1,443 mm / 56.8 in.	1455 mm / 57.3 in.	1455 mm / 57.3 in.	1455 mm / 57.3 in.	1455 mm / 57.3 in.

Key Specifications

Engine

Single cylinder, two-stroke

Power

Not published by manufacturer

Torque

Not published by manufacturer

Top Speed

Not published by manufacturer

Weight

94.8 kg / 209.0 lbs

Fuel Capacity

8.00 litres / 2.11 US gallons

Full 2022 Yamaha YZ125X Specifications

Colours Team Yamaha Blue

Warranty 30 Day Limited Factory Warranty

Ground Clearance (in.) 13.8 inches

Ground Clearance (mm) 351 mm

Seat Height 975 mm / 38.4 in.

Wheelbase 1455 mm / 57.3 in.

Height 1285 mm / 50.6 in.

Length 2141 mm / 84.3 in.

Width 825 mm / 32.5 in.

Oil Capacity (l) 0.70 litres

Oil Capacity (Quarts) 0.74 US quarts

Fuel Capacity 8.00 litres / 2.11 US gallons

Wet Weight 94.8 kg / 209.0 lbs

Bore x Stroke (in,) 2.1 x 2.1 inches

Bore x Stroke (mm) 54.0 x 54.5 mm

Displacement (cc) 125.0 cc

Displacement (ci) 7.63 cubic inches

Engine Type Single cylinder, two-stroke

Engine Detail Reed-valve-inducted

Fuel System Carburettor. Mikuni TMX 38

Compression Ratio 8.8:1

Engine Lubrication Premix

Ignition CDI

Starter Kick

Clutch O-ring chain

Final Drive Chain (final drive)

Gearbox 6-speed

Frame Type Semi-double cradle aluminium frame

Suspension - Front KYB® Speed-Sensitive System inverted fork; fully adjustable

Suspension - Rear KYB® single shock; fully adjustable

Rake 26.8°

Trail 117 mm / 4.6 in.

Wheel Travel - Front 300 mm / 11.8 in.

Wheel Travel - Rear 315 mm / 12.4 in.

Brakes - Front Single disc. Hydraulic.

Brakes - Rear Single disc. Hydraulic.

Rims Dunlop® Geomax AT81 tires

Tyres - Front 90/90-21

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.