Yz250X
2026 Yamaha Yz250X Technical Analysis & Specification Breakdown
Built around Yamaha's motorcycle platform, the 2026 Yamaha Yz250X features a 249 cc engine configuration. Internal engine geometry specifies a bore and stroke of 66.4mm × 72.0mm with a 7.9~9.4:1 compression ratio.
On the scales, the Yz250X measures 229 kg (505 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 38 mm (1.5 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 58 mm (2.3 in) wheelbase engineered for quick, flickable steering geometry. The 1.8-liter (0.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 11 indexed model years from 2016 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
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