2023 Yamaha YZ125X

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Engine Type

125cc liquid-cooled 2-stroke; reed-valve inducted

Bore x Stroke

54.0 mm x 54.5 mm

Compression Ratio

7.8~10.2:1

Fuel Delivery

Hitachi Astemo® Keihin PWK38S

Transmission

6-speed; multiplate wet clutch

Final Drive

Chain

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