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YZ125X

YZ125X

Based on the celebrated YZ125 motocrosser, the YZ125X is optimised for the unique demands of enduro and cross country racing.

The powerful Yamaha Power Valve System (YPVS) equipped 125cc two-stroke engine is mated to a six-speed transmission for the ultimate cross country powerplant. An ultra-lightweight aluminium semi-double cradle frame is engineered to provide competition-ready handling character and composure.

It comes paired with best-in-class Speed Sensitive KYB® spring-type front fork and high performance KYB® long-travel rear shock, both fully adjustable and tuned for the specific demands of cross country racing.

Features

2 stroke power tuned for off road

2 stroke power tuned for off road

The YZ125's advanced, liquid-cooled YPVS-equipped 125cc two-stroke engine provides impressive acceleration, thrilling mid- to high-rpm power, along with supreme usability.
 

YZ based frame

YZ based frame

A race-proven, highly developed aluminium semi-double cradle frame is engineered to provide the perfect balance of rigidity and flex for competition-ready handling character and composure. Removable aluminium rear subframe is constructed of square-section tubing for reduced weight. 

Cross-country features

Cross-country features

The YZ125X comes equipped with an 18-inch rear wheel, standard side stand, sealed O-ring chain, reserve fuel petcock, lightweight bar pad, headlight and scraper between the fork's dust and oil seal, all adding up to exceptional off-road performance.

Enduro ergonomics

Enduro ergonomics

A racy ‘gripper’ type seat and narrow fuel tank combine with a tapered aluminium handlebar and adjustable mounts to create greater freedom of movement and more comfortable ergonomics for riders.

Enduro-specific wheels and tyres

Enduro-specific wheels and tyres

Cross-country-spec Dunlop Geomax MX33 tyres front and rear are ready to head straight to the races. An 18-inch rear tyre has a taller sidewall to improve comfort and reduce pinch flats.

Industry-leading KYB fork

Industry-leading KYB fork

Industry-leading, fully adjustable KYB spring-type forks now feature tool-free compression adjustment at the top of each fork leg. The speed sensitive damping uses piston speed to control damping force for super-precise handling and a smooth ride, with minimal wasted stroke or abrupt shocks for the rider – all tuned for the demands of off-road racing.

Technical Specification

Engine

Engine Type: Liquid-cooled, 2-stroke, reed-valve

Displacement (cc): 125.0

Bore x Stroke (mm): 54.0 x 54.5

Compression Ratio: 7.8 - 10.2 : 1

Lubrication System: Premix

Fuel Management: PWK38S

Ignition: CDI

Starter System: Kick

Fuel Tank Capacity (L): 7.0

Final Transmission: Chain

Transmission: Constant mesh 6-speed

Chassis

Frame Type: Aluminium controlled filled semi double cradle

Suspension Front: Telescopic forks, 300mm travel

Suspension Rear: Swingarm (link suspension), 315mm travel

Brakes Front: Hydraulic single disc, 270mm

Brakes Rear: Hydraulic single disc, 240mm

Tyres Front: 80/100-21 51M Tube type

Tyres Rear: 110/100-16 64M Tube type

Dimensions

Length (mm): 2155

Width (mm): 825

Height (mm): 1290

Seat Height (mm): 970

Wheelbase (mm): 1455

Ground Clearance (mm): 355

Wet Weight (kg): 97

Gallery

Resources

2026 Off Road Brochure

Download Specification Sheet

Next Steps

Interested? Call Racecourse Motors on 02 9314 7700
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