2026 Yamaha YZ250X Base

Information

2026 Yamaha YZ250X

Engineered with all the reliability and durability you've come to expect from Yamaha, this two-stroke was born to win Cross Country races. Featuring a robust 250cc engine, optimized rider ergonomics, and a long list of XC details that solidifies its position as the king of woods!

Features may include:

Lightweight, compact, liquid-cooled, 249cc, piston-reed-valve-inducted, 2-stroke.

super crisp, instant "right now" engine power (when in the "power band")

easy & economical to maintain, service & rebuild

Key engine differences Vs YZ250.

revised cylinder head volume Vs. YZ250 (slight increase in volume Vs. YZ250)

7.9:1 compression ratio (slightly less than YZ250)

revised YPVS power valve (actuation rpm & shape)

revised exhaust port (main) size & timing

Lightweight, aluminum, semi-double-cradle frame.

combines with compact engine to provide an awesome power to weight ratio

Removable rear subframe.

constructed of square-section, lightweight aluminum

detachable design allows easy access when servicing rear suspension components

reduces costs in the event of a loop out

Photos

Highlights

  • Penticton, British Columbia
  • 2026
  • Yamaha
  • YZ250X Base
  • Constant mesh, 5-speed
  • Available
  • 825 mm (32.5")
  • 1,290 mm (50.8")

Specifications

  • 2026
  • Yamaha
  • YZ250X
  • Base
  • Off-Road
  • 2-stroke, reed-valve, single
  • 249 cc
  • Liquid-cooled
  • 66.4 mm
  • 72 mm
  • 7.9 ~ 9.4:1
  • Keihin PWK38S
  • CDI
  • Kick
  • Constant mesh, 5-speed
  • Chain
  • Fully adjustable 48 mm inverted fork
  • Fully adjustable link Monocross
  • 270 mm floating disc / twin piston caliper
  • 240 mm disc / single piston caliper
  • 110/100-18
  • 300 mm (11.8")
  • 315 mm (12.4")
  • 2,185 mm (86")
  • 825 mm (32.5")
  • 1,290 mm (50.8")
  • 1,485 mm (58.5")
  • 360 mm (14.2")
  • 975 mm (38.4")
  • 8 litres (1.8 imp. gallons)
  • Wet: 104 kg (229 lbs)
  • Yamaha Racing Blue