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2018 Yamaha YZ250FX
2018 Yamaha YZ250FX

Specs

General Information

Manufacturer
Yamaha
Yamaha
Model Year
2018
2018
Model
YZ250FX
YZ250FX
Model Code
YZ250FXJ
YZ250FXJ
Color
Team Yamaha Blue
Team Yamaha Blue

Brakes/Wheels/Tires

Brakes

Front - 270 mm hydraulic disc

Rear - 245 mm hydraulic disc

Front - 270 mm hydraulic disc

Rear - 245 mm hydraulic disc

Tires

Front - 90/90-21 Dunlop® AT81F

Rear - 110/100-18 Dunlop® AT81

Front - 90/90-21 Dunlop® AT81F

Rear - 110/100-18 Dunlop® AT81

Dimensions

Length
85.2 in.
85.2 in.
Height
50.4 in.
50.4 in.
Width
32.5 in.
32.5 in.
Weight
Wet - 249 lb.
Wet - 249 lb.
Ground Clearance
12.8 in.
12.8 in.
Wheelbase
57.7 in.
57.7 in.
Seat Height
38 in.
38 in.

Drivetrain

Transmission
Wide-ratio constant-mesh 6-speed
Wide-ratio constant-mesh 6-speed
Final Drive
O-ring chain
O-ring chain

Engine

Engine
DOHC, 4-stroke, 4 titanium valves
DOHC, 4-stroke, 4 titanium valves
Cooling
Liquid
Liquid
Displacement
250 cc
250 cc
Bore x Stroke
77 x 53.6 mm
77 x 53.6 mm
Clutch
Multi-plate wet
Multi-plate wet
Fuel System
Keihin® fuel injection, 44 mm
Keihin® fuel injection, 44 mm
Ignition
TCI (Transistor Controlled Ignition)
TCI (Transistor Controlled Ignition)
Fuel Capacity
2 gal.
2 gal.

Operational

Suspension

Front - KYB® spring-type fork with speed sensitive damping, fully adjustable; 12.2 in. travel

Rear - KYB® single shock, fully adjustable; 12.5 in. travel

Front - KYB® spring-type fork with speed sensitive damping, fully adjustable; 12.2 in. travel

Rear - KYB® single shock, fully adjustable; 12.5 in. travel

Rake
26.3°
26.3°
Trail
4.5 in.
4.5 in.

Other

Warranty
30 Day (Limited Factory Warranty)
30 Day (Limited Factory Warranty)

Features

Chassis / Suspension

  • LIGHT AND STRONG ALUMINUM FRAME: An all-aluminum bilateral beam frame similar to the YZ250F provides strength, lightness and durability for race conditions, and for 2017 comes with a rugged plastic skid plate.
  • ADVANCED SUSPENSION: Industry favorite KYB® fully adjustable spring-type forks with speed sensitive damping and Kashima Coat™ and a KYB® rear shock, also with Kashima Coat™ and featuring a large 50mm piston. Both the fork and rear shock are tuned specifically for cross country racing, with updated fork seals for improved durability in harsh conditions.
  • PURPOSE-BUILT TIRES: Special cross-country racing Dunlop® AT81 tires are used to maximize traction while delivering excellent wear.
  • 270 MM FRONT BRAKE: Large 270mm front disc brake coupled with high-performance pad material offers outstanding machine control and performance, with exceptional stopping power and controllability.

Engine

  • UNIQUE ENGINE TUNING: The revolutionary, rearward slanted, high-performance liquid-cooled, 4-stroke, 4-valve, fuel-injected engine has been tuned to challenge for race victories in the very competitive GNCC® and Hare Scrambles race series.
  • MASS-CENTRALIZED POWERPLANT: The position of the engine moves the rotational mass of the cams towards the center of the bike which allows for a straight shot, down draft intake and straight exhaust port for maximized engine performance. Additional, this layout keeps the air box up high, out of dust and mud/water.
  • FUEL INJECTION: The fuel injection system uses 3D mapped electronic control for the fuel and ignition timing that are optimized for cross-country racing.
  • 6-SPEED GEARBOX: A wide-ratio 6-speed transmission is used to insure the right gear is available for the wide variety of terrain found in cross-country racing.
  • ELECTRIC START: Push button electric start makes starting the YZ250FX easy and convenient.

Other Features

  • GYTR® POWER TUNER READY: Accessory GYTR Power Tuner lets owners adjust air/fuel mixture and ignition timing maps to match engine performance characteristics to the rider and race conditions in a matter of seconds with the push of a few buttons.
  • PRACTICAL TOUCHES: Quick-adjust clutch, wide 55mm platform footpegs, four-position rubber- mounted handlebar clamps, aluminum handlebars, and a side stand are standard for added rider convenience. The YZ250FX is also pre-wired for an optional radiator fan for the most grueling conditions.
  • EASY SERVICING: Redesigned air cleaner cover helps prevent contact with the quick-release quarter-turn Dzus® air box fasteners for tool-less access to the air filter.
  • SEALED O-RING CHAIN: High-quality O-ring chain is tough and durable.

Top Features

  • INNOVATIVE HARE SCRAMBLE/GNCC® ENGINE DESIGN: Based on the championship-winning YZ250F™, featuring Yamaha’s revolutionary rearward slanted, liquid-cooled, DOHC 4-stroke power plant with forward-positioned straight downdraft symmetrical intake, and with an added sixth gear and wide ratio transmission, the YZ250FX™ is an “out-of-the-box” Hare Scrambles/GNCC® competition machine.
  • UPDATED ENGINE: The engine is based on the 2017 YZ250F, and includes a wide variety of updates: cylinder head:; lightweight forged, two-ring, flat-top piston; a shorter, more durable piston pin with diamond like carbon (DLC) coating; a revised piston oil jet, and connecting rod, crankshaft, and counterbalancer designs. Together, these updates improve peak power, power delivery and overall durability.
  • 6-SPEED TRANSMISSION: A wide-ratio 6-speed transmission is used to insure the right gear is available for the wide variety of terrain found in cross-country racing.
  • CHASSIS: Nearly the same bilateral beam frame that is found on the championship winning YZ250F is used on the YZ250FX. Changes for 2017 include a forged section at the swingarm pivot, and revised engine mounting brackets for nimble lightweight feeling in the tight technical terrain while still providing stability in fast sections.
  • ADVANCED SUSPENSION: Industry-leading, fully adjustable KYB® spring-type fork with speed sensitive damping features revised valving for improved suspension feel and balance. The linkage type rear suspension features a KYB rear shock with updated settings optimized for cross country racing.
  • CROSS COUNTRY FEATURES: With the electric starting system, a 2-gallon fuel tank, rugged plastic skid plate, 18-inch rear wheel and XC racing tires, the YZ250FX is ready to win right out of the box.

Chassis / Suspension

  • LIGHT AND STRONG ALUMINUM FRAME: An all-aluminum bilateral beam frame similar to the YZ250F provides strength, lightness and durability for race conditions, and for 2017 comes with a rugged plastic skid plate.
  • ADVANCED SUSPENSION: Industry favorite KYB® fully adjustable spring-type forks with speed sensitive damping and Kashima Coat™ and a KYB® rear shock, also with Kashima Coat™ and featuring a large 50mm piston. Both the fork and rear shock are tuned specifically for cross country racing, with updated fork seals for improved durability in harsh conditions.
  • PURPOSE-BUILT TIRES: Special cross-country racing Dunlop® AT81 tires are used to maximize traction while delivering excellent wear.
  • 270 MM FRONT BRAKE: Large 270mm front disc brake coupled with high-performance pad material offers outstanding machine control and performance, with exceptional stopping power and controllability.

Engine

  • UNIQUE ENGINE TUNING: The revolutionary, rearward slanted, high-performance liquid-cooled, 4-stroke, 4-valve, fuel-injected engine has been tuned to challenge for race victories in the very competitive GNCC® and Hare Scrambles race series.
  • MASS-CENTRALIZED POWERPLANT: The position of the engine moves the rotational mass of the cams towards the center of the bike which allows for a straight shot, down draft intake and straight exhaust port for maximized engine performance. Additional, this layout keeps the air box up high, out of dust and mud/water.
  • FUEL INJECTION: The fuel injection system uses 3D mapped electronic control for the fuel and ignition timing that are optimized for cross-country racing.
  • 6-SPEED GEARBOX: A wide-ratio 6-speed transmission is used to insure the right gear is available for the wide variety of terrain found in cross-country racing.
  • ELECTRIC START: Push button electric start makes starting the YZ250FX easy and convenient.

Other Features

  • GYTR® POWER TUNER READY: Accessory GYTR Power Tuner lets owners adjust air/fuel mixture and ignition timing maps to match engine performance characteristics to the rider and race conditions in a matter of seconds with the push of a few buttons.
  • PRACTICAL TOUCHES: Quick-adjust clutch, wide 55mm platform footpegs, four-position rubber- mounted handlebar clamps, aluminum handlebars, and a side stand are standard for added rider convenience. The YZ250FX is also pre-wired for an optional radiator fan for the most grueling conditions.
  • EASY SERVICING: Redesigned air cleaner cover helps prevent contact with the quick-release quarter-turn Dzus® air box fasteners for tool-less access to the air filter.
  • SEALED O-RING CHAIN: High-quality O-ring chain is tough and durable.

Top Features

  • INNOVATIVE HARE SCRAMBLE/GNCC® ENGINE DESIGN: Based on the championship-winning YZ250F™, featuring Yamaha’s revolutionary rearward slanted, liquid-cooled, DOHC 4-stroke power plant with forward-positioned straight downdraft symmetrical intake, and with an added sixth gear and wide ratio transmission, the YZ250FX™ is an “out-of-the-box” Hare Scrambles/GNCC® competition machine.
  • UPDATED ENGINE: The engine is based on the 2017 YZ250F, and includes a wide variety of updates: cylinder head:; lightweight forged, two-ring, flat-top piston; a shorter, more durable piston pin with diamond like carbon (DLC) coating; a revised piston oil jet, and connecting rod, crankshaft, and counterbalancer designs. Together, these updates improve peak power, power delivery and overall durability.
  • 6-SPEED TRANSMISSION: A wide-ratio 6-speed transmission is used to insure the right gear is available for the wide variety of terrain found in cross-country racing.
  • CHASSIS: Nearly the same bilateral beam frame that is found on the championship winning YZ250F is used on the YZ250FX. Changes for 2017 include a forged section at the swingarm pivot, and revised engine mounting brackets for nimble lightweight feeling in the tight technical terrain while still providing stability in fast sections.
  • ADVANCED SUSPENSION: Industry-leading, fully adjustable KYB® spring-type fork with speed sensitive damping features revised valving for improved suspension feel and balance. The linkage type rear suspension features a KYB rear shock with updated settings optimized for cross country racing.
  • CROSS COUNTRY FEATURES: With the electric starting system, a 2-gallon fuel tank, rugged plastic skid plate, 18-inch rear wheel and XC racing tires, the YZ250FX is ready to win right out of the box.