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2017 Yamaha YZ250FX on www.Totalmotorcycle.com
The Ultimate X-Country Racer...
YZ250FX is a light, powerful machine built to win cross country races.
The high flying, high paced action of motocross is not for everyone. As a result, the slightly less intense world of cross country / harescramble racing is experiencing solid growth and interest. The YZ250FX is a cross country focused model with the performance potential of the YZ250F. If you are serious about winning, the YZ250FX could be the machine for you. Check out the impressive list of improvements for 2017.
2017 Yamaha YZ250FX www.Totalmotorcycle.com Key Features
1. Innovative Hare Scramble/GNCC® Engine Design
Based on the championship-winning YZ250F, featuring Yamahas 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.
2. Updated Engine
The all-new engine is based on the 2017 YZ250F, and includes a wide variety of updates: an all-new 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 allnew connecting rod, crankshaft, and counterbalancer designs. Together, these updates improve peak power, power delivery and overall durability.
3. 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.
4. New Chassis
Nearly the same bilateral beam frame that is found on the championship winning YZ250F is used on the YZ250FX. Changes for 2017 include an all new 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.
5. 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.
6. 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.
Convenient, dependable electric start ensures hassle-free, push button start.
The YZ250FX uses the "Best in Class" YZ250F reversed cylinder,
rearward slanted engine with modified fuel injection settings, electric starting
and a 6-speed transmission. With the optional GYT-R YZ Power tuner, you can
adjust both fuel mapping and ignition mapping to best suit conditions and
2017 Yamaha YZ250FX www.Totalmotorcycle.com Features and Benefits
///Key Improvements for 2017
New cylinder head with revised intake & exhaust port shapes
Revised intake & exhaust camshafts & valve springs
Revised intake tract & intake manifold
Revised piston, piston pin & oil jet nozzle
Revised connecting rod & crankshaft
New crankcase heat treating process
Revised 6-speed transmission & gear shift lever
Revised airbox cover & fasteners
Revised wrap around exhaust header pipe
Revised frame & engine mounts
Revised fork seals
New larger 270 mm front disc
Optimized suspension settings
Revised fork seal design features a new scraper
New, engine trouble & low fuel warning lights
Kickstarter has been discontinued to save weight (available as an accessory)
///Key features for 2017
Latest generation YZ250F based rear slanting engine & Bilateral Beam chassis
Forward mounted fuel injection & wrap around exhaust
YZ based, fully adjustable KYB suspension
18 inch rear wheel
GYTR Power Tuner compatible
Revised, "reversed" liquid-cooled, 250cc, DOHC, 4-valve (titanium), single with fuel injection. The engine has been tuned for excellent "ride ability & controllability" and delivers a broad, easy to use power band with excellent power characteristics throughout the rev range. 2017 model changes improve power delivery in both low to mid and mid to top end performance.
Rearward slanted, reversed cylinder design.
rearward slant moves a significant amount of rotating weight toward the centre of the chassis
rearward slanted cylinder centralizes mass for excellent handling & a light, agile feel
"Reversed" engine design (FI system is front mounted, exhaust exits from rear of cylinder).
forward mounted FI provides straight intake path into the cylinder & provides optimum fuel/ air filling & flow for excellent power
front mounted intake design keeps fuel cooler since engine heat has less effect on incoming fuel (cooler fuel is more dense & increases power)
design also helps centralize mass for light, agile handling
Electric start with auto decompression system. Unit can be re-started in any gear.
NOTE: kick starter has been discontinued / removed (available as an accessory).
there is no main ignition switch on this model
electric start button (RHS handlebar) activates the entire electrical system
kill switch (LHS handlebar) if held for a few seconds shuts down entire electrical system
removal of kick starter & related gears etc. reduces weight
Revised, 4-valve cylinder head features a 13.5:1 compression ratio.
intake port has been raised 4 mm (Vs. '16) for improved flow
larger diameter intake valve seats improve flow
improved power delivery across the rev range (low, mid & top)
4-valve design offers optimum flow & excellent power
Lightweight titanium valves & revised load optimized valve springs.
titanium valves reduce reciprocating weight & allow for a higher rpm limit before valve float
intake & exhaust valve spring size have been increased to match revised cams
titanium valves means a faster-revving engine with smooth power delivery
31 mm titanium intake valves & 25 mm titanium exhaust valves
Shorter internal air box funnel & new intake manifold with larger cross section.
improved fuel - air flow for increased power
improved over-rev feeling
reduced horsepower losses in the mid to high rpm (reduced friction as fuel-air "charge"
travels thru the intake tract) Automatic cam chain tensioner.
special cam chain "sliders" reduce internal friction losses
Revised, intake & exhaust camshafts.
revised intake & exhaust cam profiles (working angle & lift) for improved power & "control-ability"
hollow design reduces weight
New, lightweight, short-skirt, forged aluminum piston.
new, lighter, flat top piston features lateral ribs on both sides of the piston pin area
7% reduction in piston weight means faster engine response
single compression ring & specially designed oil control ring increases surface contact area for better sealing
2-ring design decreases sliding resistance, reduces weight & provides faster throttle response
Revised, lighter weight piston pin features a diamond like coating (DLC) to reduce friction.
Revised, piston oil cooler jet nozzle directs oil to the desired portion of the cylinder & underside of piston.
reduces piston, cylinder & rod temperatures for excellent durability
"Liner-less" lightweight aluminum cylinder with ceramic composite coating.
ceramic coating sprayed directly on the aluminum block, eliminating the need for a liner & reducing weight
excellent heat dissipation for consistent power delivery
coating enhances the thin film of oil between cylinder & piston, reducing friction & increasing power
Cylinder & crankcase "cutaways" allow air "trapped" under the piston to enter special chambers or cutaways.
reduces horsepower-robbing "pumping losses"
crankcase cutaways match cylinder cutaways for maximum efficiency
New heating treating process for crankcases.
heating treating process increases crankcase strength by 5%
improved crankcase strength matches increased power output
Revised ball bearing style crankshaft.
new bronze thrust washers added between crank webs & rod
heat treated for strength & durability
balance ratio of the crank has been optimized to reduce vibration & improve torque feeling
New nickel-chromium-molybdenum connecting rod.
excellent strength & durability
increased strength to maintain precise big end roundness during high rpm & high load use
bronze thrust washers on either side of the rod to reduce friction Lightweight gear driven counter balancer shaft.
reduces vibration for improved rider comfort & less rider fatigue
Revised 6-speed transmission utilizes a 2-bar, floating shift guide system & a 14 mm shift shaft.
new surface treatment on selected gears for durability
new, stronger heat treated gear shift lever
transmission utilizes a 2-bar, floating shift guide system & a 14 mm shift shaft
good durability in the event of a crash (14 mm shift shaft)
see spec page for gear ratios
Revised, heavy duty, multi-plate, clutch features a quick access magnesium outer cover.
new low friction bushing on actuation arm reduces lever pull / effort
clutch is designed for the rigours of cross country
outer cover provides fast & easy clutch access
44mm Keihin throttle body fuel injection system.
maximizes fuel atomization for more complete combustion & excellent power delivery
FI benefits include automatic adjustments to insure the optimum fuel - air ratio regardless of outside air temperature & altitude
other benefits include excellent starting & excellent throttle response
cold start knob also doubles as an idle adjuster
Injector spray pattern, spray direction & distance to the intake valves have been optimized.
forward mounted straight intake tract maximizes benefits of the FI system & improves power output
New, handlebar mounted engine trouble & low fuel warning lights.
Optional, compact, hand held "GYTR Power Tuner" allows tailoring of both fuel injection duration & ignition mapping.
9- different setting points can be accessed for both fuel duration & ignition maps
maps can be stored & shared with other Power Tuners if desired
easy access GYTR Power Tuner connector port
Revised forward mounted air box features a washable, dual-stage, foam air filter.
airbox cover features flush mounted quick release fasteners
no tools required to access air filter
washable foam filter reduces tune up costs
Wet sump lubrication system.
reduces weight (no remote oil tank or oil lines)
eases maintenance (easier & faster oil changes)
oil volume is optimized to reduce oil related drag & weight
Easy access "cartridge-type" oil filter.
Compact, lightweight, single core, YZ250F based dual radiators.
outstanding cooling efficiency
pre-wired for accessory cooling fan... fits on right side rad only
Maintenance-free transistor controlled ignition (TCI).
produces a strong spark for fast starts
provides precise ignition timing / mapping for optimum engine performance at all rpms
Revised ECU with new ignition mapping & fuel mapping for improved power & over rev feeling.
High capacity AC magneto eliminates need for a battery.
Revised, wrap-around exhaust system to match head, cam & intake improvements.
header pipe diameters have been revised for a 12 to 16% flow improvement
exhaust exits from the rear of the engine & circles cylinder body
wrap-around design ensures the optimum tuned header length
maximizes exhaust "pulse effect" for excellent power delivery
centralizes mass by moving weight closer to the centre of the chassis
Lightweight, aluminum, re-packable muffler (aka silencer).
sound output is 94 dB meeting CMRC & AMA regulations
Works-style race-spec "barrel adjuster" for on-the-fly clutch lever free play adjustments.
New, heavy-duty plastic engine skid plate
Excessive lean angle sensor
Will shut down the engine if the bike lays on its side
helps prevent costly engine damage
no special procedure to re-start the bike... just kick it and go
Revised, compact "Bilateral Beam" aluminum frame.
revised frame with wider spars in the swingarm pivot area (up to 12 mm wider)
revised engine mounts
frame & engine designs centralize mass for exceptional handling & agility
frame offers an optimum rigidity balance between strength, rigidity & tuned flex, plus excellent shock absorbing qualities
frame design offers excellent "rider - machine communication" (a.k.a. feedback)
Lightweight, tapered aluminum swingarm.
lightweight design reduces unsprung weight for excellent suspension performance
excellent rear wheel traction & control
large 25 mm rear axle
Lightweight detachable rear sub frame.
constructed of square-section, lightweight aluminum pipe with no bends
allows easy access when servicing rear suspension components
Revised, YZ250F based, 48mm, adjustable, inverted, Kayaba "SSS" cartridge fork offers 310mm (12.2") of wheel travel.
revised fork seal design features a new scraper for improved cleaning performance in muddy conditions
revised valving & settings are optimized for cross country racing
front fork adjustments include: 20-way compression damping and 20-way rebound damping
optional fork springs are available through Genuine Yamaha parts.
Fork features a twin-chamber, "Speed Sensitive System" design
damper unit is in a separate structure (completely separated air & oil chambers)
helps prevent aerated fork oil from entering the inner damper assembly & degrading its damping abilities
since the inner damper is pressurized; it also eliminates bubbles forming in the oil
Fork also features a Transfer Control Valve (TCV).
TCV enhances damping from mid to full stroke & improves bottoming characteristics
TCV offers more precise control throughout the full suspension stroke
TCV is located on the upside of the spring & its function is controlled by piston speed, not piston position, hence the term "Speed Sensitive System fork".
Revised fork seal design features a new scraper for improved cleaning performance in muddy conditions
Large "wrap-around" plastic fork protectors provide excellent lower fork tube protection.
"self-supporting" design reduces friction for smoother fork operation.
Revised YZ250F based, Monocross link rear suspension features a fully adjustable Kayaba piggyback shock with 318 mm (12.5") of wheel travel.
revised valving & settings are optimized for cross country racing
shock features separate adjusters for high- and low-speed compression damping
shock adjustments include: threaded spring preload, 20-way low-speed compression damping, 2 turns of high speed compression damping & 30-way rebound damping
Adjustable handlebar holders offer a total of 4 different handlebar positions with an adjustment range of 30mm.
suits wide variety of rider sizes
handlebar holders are rubber mounted for reduced vibration & improved rider comfort
New, larger, 270mm floating front "wave-style" disc & compact Nissin twin piston caliper.
wave disc design reduces weight & improves cooling (wave design offer more surface area for better cooling)
high friction brake pads
excellent braking performance
"Shorty style" adjustable front brake lever can be adjusted to fit various hand sizes.
245 mm rear disc brake uses a "wave-style" disc & single piston Nissin caliper & Nissin master cylinder.
Rear caliper & lower portion of the disc are protected by heavy duty plastic protectors.
Lightweight, plastic resin 7.5 litre fuel tank is located under the seat.
reduces centre of gravity & centralizes mass for exceptional handling performance
tank can be flipped on its back without disconnecting fuel line (easy servicing under the tank)
compact in-tank electric fuel pump
New, handlebar mounted engine trouble & low fuel warning lights
Compact body work.
reduces weight & enhances the lightweight feel and look of the YZ250FX
flat design, "minimal" bodywork allows for fast, easy rider movements & a natural riding position
minimal design aids in keeping the body looking good (less plastic to scratch or damage)
graphics are impregnated directly into the plastic rad shrouds & will not peel off or get damaged by pressure washing
Flat seat design.
provides easy rider movements
features a "cap cover" to access the fuel cap
non-slip seat cover material resists clogging with dirt or mud
Rugged, 21" (1.60 x 21) front & 18" (1.85 x 18) D.I.D. rear rims.
reduce unsprung weight for optimal suspension performance & handling
18" rear wheel improves puncture resistance (Vs. 19" designs)
Dunlop AT81 tires
Convenient oil level sight glass
Lightweight, extra wide foot pegs
Folding shift lever tip helps prevent damage
Lightweight chain guide / support helps reduce chance of chain derailment & helps protect rear sprocket
Heavy duty rubber swingarm protector (chain)
Heavy duty sealed "O" ring drive chain
Clutch cable features integrated silicone grease & Teflon liner for smooth cable operation
Easy access GYTR Power Tuner & Yamaha Diagnostic tool connectors
Sealed, no spill, gel type, low maintenance battery (note: any motorcycle battery must be regularly charged during winter storage)
2017 Yamaha YZ250FX - www.Totalmotorcycle.com
USA Specifications/Technical Details
US MSRP Price: $7,999 USD
Engine Type 250cc liquid-cooled DOHC 4-stroke; 4 titanium
Bore x Stroke 77.0mm x 53.6mm
Compression Ratio 13.5:1
Fuel Delivery Keihin® fuel injection, 44mm
Ignition TCI: Transistor Controlled Ignition
Transmission Wide-ratio constant-mesh 6-speed; multiplate wet
Final Drive O-ring chain
Suspension / Front KYB® spring-type fork with speed sensitive
damping; fully adjustable, 12.2-in travel
Suspension / Rear KYB® single shock; fully adjustable, 12.5-in
Brakes / Front Hydraulic disc, 270mm
Brakes / Rear Hydraulic disc, 245mm
Tires / Front 90/90-21 Dunlop® AT81F
Tires / Rear 110/100-18 Dunlop® AT81
L x W x H 85.2 in x 32.5 in x 50.4 in
Seat Height 38.0 in
Wheelbase 57.7 in
Rake (Caster Angle) 26.3°
Trail 4.5 in
Ground Clearance 12.8 in
Fuel Capacity 2.0 gal
Wet Weight 249 lb
Warranty 30 Day (Limited Factory Warranty)
Color Team Yamaha Blue
2017 Yamaha YZ250FX - www.Totalmotorcycle.com
Canadian Specifications/Technical Details
Canada MSRP Price: $8999 CDN
Liquid-cooled, DOHC, 4-valve (titanium), single
Bore and Stroke
77 x 53.6 mm
44 mm Keihin throttle body F.I.
Ignition / Starting
TCI / Electric
Wide ratio 6-speed transmission
primary ratio 3.353 (57/17)
secondary ratio 3.923 (51/13)
1st gear - 2.385 (31/13)
2nd gear - 1.813 (29/16)
3rd gear - 1.444 (26/18)
4th gear - 1.143 (24/21)
5th gear - 0.957 (22/23)
6th gear - 0.815 (22/27)
"O" ring chain
Adj. 48 mm, inverted fork / 310 mm (12.2") wheel travel
Fully adj. Monocross / 318 mm (12.5") wheel travel
270 mm, floating disc / twin piston caliper
245 mm disc / single piston caliper
2,165 mm (85.2")
825 mm (32.5")
1,280 mm (50.4")
1,465 mm (57.7")
325 mm (12.8")
965 mm (38")
7.5 litres (1.7 imp. gallons)
113 kg (249 lb)
Yamaha Racing Blue
2017 Yamaha YZ250FX - www.Totalmotorcycle.com
European Specifications/Technical Details
Europe/UK MSRP Price: £ See Dealer for Pricing in GBP (On The Road inc 20% Vat)
Model not available
Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).