Two-Stroke Agility: Tuned for Cross Country and Hare Scrambles Racing The YZ125X is optimized for the unique demands of Hare Scrambles and GNCC® racing. The YPVS™-equipped 125cc two-stroke engine is mated to a six-speed transmission for the ultimate cross country powerplant.
Lightweight Aluminum Frame Ultra-lightweight YZ125-spec frame features a carefully engineered combination of aluminum castings, forgings and extrusions for the perfect balance of rigidity and flex for competition-ready handling character and composure.
Industry-Leading Suspension Yamaha’s renowned KYB® speed sensitive spring-type front fork is matched with a high performance KYB® long-travel rear shock, both fully adjustable and tuned for the demands of cross country racing.
GNCC®-Specific Features Cross country focused suspension setup and Dunlop® Geomax AT81 tires, 18-inch rear wheel, sealed O-ring chain, a standard side stand and fuel tank petcock with reserve position are perfect for GNCC® racing.
Racing Style and Ergonomics The YZ125X carries the racing heritage of the YZ motocrosser with its aggressive styling from the front fender to the rear brake protector. Complete with an aluminum tapered handlebar, YZ-F-style foot pegs, gripper seat and Dunlop® Geomax AT81 tires, the YZ125X is competition-ready straight out of the crate.
GNCC®-Tuned YZ125 Power Based on the legendary 125cc liquid-cooled, reed-valve-inducted YZ two-stroke engine, the YZ125X utilizes a revised compression ratio, Yamaha Power Valve System (YPVS™) timing and a model-specific CDI unit—all focused on creating broad power delivery that suits off-road terrain and a wide range of rider skill levels.
Revised Power Valve The YZ125X features the patented Yamaha Power Valve System—with broader opening timing compared to the motocross version for smoother power—to create a smooth balance of power across the rev range.
Narrow Exhaust Pipe The compact exhaust expansion chamber provides both horizontal and vertical clearance on tight, technical trails while still providing excellent exhaust efficiency.
Racing Intake System Specially designed carbon fiber reed-valve petals improve throttle response and engine performance across the entire rpm range.
Six-Speed Transmission Smooth-shifting six-speed transmission ensures proper gearing, from tight woods to wide-open fire roads, optimizing power delivery from the two-stroke powerplant.
YZ125 Cooling System Large-capacity radiator features a large cooling core with protective louvers for maximum cooling efficiency and durability in racing conditions.
Digital Ignition Specifically tuned for the needs of the YZ125X, the digital CDI ignition system delivers precise spark for faster, stronger response anywhere in the powerband.
Industry-Leading KYB® Fork The industry-leading, fully adjustable KYB® spring-type fork with speed-sensitive damping uses piston speed to control the damping force for super-precise handling and a smooth ride. With minimal wasted stroke or abrupt shocks for the rider, this bike is tuned for the demands of cross country racing.
Smooth KYB® Shock Fully adjustable KYB® rear shock features 12.4 inches of travel, separate adjusters for high- and low-speed compression damping and a full lock oil rebound system for increased comfort, control and fantastic rear wheel traction in challenging conditions.
YZ-Based Frame A carefully engineered aluminum frame and swingarm give the YZ125X the famous handling proven by the championship-winning YZ motocross riders on tracks around the world.
Lightweight Subframe Removable aluminum rear subframe is constructed of square-section tubing for reduced weight.
270mm Front Brake Large 270mm front rotor coupled with high performance pad material offer excellent machine control and performance with exceptional stopping power and controllability.
Enduro-Specific Wheels and Tires Cross country-spec Dunlop® Geomax AT81 tires are competition-ready, while the 18-inch rear tire has a taller sidewall to improve comfort and reduce pinch flats.
Cross Country Ergonomics A racy "gripper"-type seat and narrow fuel tank combined with a tapered aluminum handlebar and adjustable mounts create greater freedom of movement and more comfortable ergonomics for riders.
Cross Country Features The YZ125X is focused on cross country competition with an 18-inch rear wheel, larger rear sprocket, a side stand, sealed O-ring chain and a reserve fuel petcock.