Yamaha YZ125 70th Anniversary Edition - 2026 Specifications and Reviews

The 2026 Yamaha YZ125 70th Anniversary Edition is a lightweight 125cc 2-stroke motocross bike engineered for amateur and intermediate off-road competitors. Known for its responsive power delivery and nimble handling characteristics, this model excels in technical terrain where its compact 212-pound frame and precise steering geometry provide superior maneuverability. The liquid-cooled engine and proven Keihin carburetor deliver consistent performance for riders developing advanced riding skills.

2026
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Engine and Transmission Specifications

Capacity125 cc
Final DriveChain
GearboxConstant-mesh 6-speed; multiplate wet clutch
InductionHitachi Astemo® Keihin PWK38S carburetor
Compression Ratio8.2~10.1:1
Bore x Stroke54.0mm x 54.5mm
Engine Type125cc liquid-cooled 2-stroke; reed-valve inducted
 
 

Physical measures and capacities

Ground Clearance365 mm (14.4´´)
Overall Height1,295 mm (51´´)
Overall Width825 mm (32.5´´)
Overall Length2,135 mm (84.1´´)
Wet Weight212 lb
Wheelbase56.9 in
Seat Height38.6 in
Fuel Capacity1.8 gal
 
 

Yamaha YZ125 70th Anniversary Edition dimensions and frame

Trail4.3 in

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track90%
City5%
Cornering88%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis machine is built for intermediate to expert off-road riders who understand how to manage a peaky 2-stroke motocross powerband.
PurposeIt's a pure motocross competition bike intended for closed-course racing on prepared dirt tracks, not general riding.
Rider FitThe tall 38.6-inch seat height and light 212 lb wet weight demand good leg length and standing-position strength but reward the rider with exceptional flickability.
CharacterIt has the raw, high-revving, explosive character typical of a premium 125cc 2-stroke motocrosser that rewards aggressive clutch and throttle work.
Not Ideal ForThis is not a bike for commuting, touring, carrying passengers, or riders seeking a smooth, forgiving, low-maintenance experience.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Reviews

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