ENGINE

Potent, liquid-cooled, 250cc, DOHC, 4-valve power plant with super light titanium intake valves & electronic fuel injection. This engine out performs its 250cc displacement and offers best in class performance.

Electric starting & automatic decompression system.

• easy no hassle starting
• decompression system reduces battery power requirements... reducing weight

Lightweight magnesium cylinder head cover reduces weight.

Double overhead cam, 4-valve, compact combustion chamber.

• features a compact "pent-roof" combustion chamber design for optimum combustion
• maximum breathing efficiency for excellent power output

Lightweight titanium intake valves & load-reduced oval valve springs.

• titanium valves reduces reciprocating weight & allows for a higher rpm limit (40% lighter than steel valves)
• reduced friction (load reduced) valve springs
• faster-revving & smoother power delivery
• "Ti" intake valves are 30mm in diameter, steel exhaust valves are 24.5mm

Valve adjustment intervals are every 42,000 kms.

High performance intake & exhaust camshafts

• provide outstanding class leading power
• cams feature a WPC (Wonder Process Craft) treatment that increases surface hardness for excellent durability & reduced sliding resistance

Downdraft-type straight design intake port.

• most efficient intake flow for maximum engine performance

Automatic, hydraulic cam chain tensioner.

• reduces maintenance & mechanical engine noise
• special cam chain "sliders" reduce internal frictional losses

Lightweight roller bearing style crankshaft.

• optimized mass delivers excellent throttle response & strong acceleration

Engine counter balancer

• reduces vibration for improved rider comfort & reduced rider fatigue
• despite being "only" a 250 this unit can cruise at highway speeds comfortably

Direct ceramic composite plated cylinder uses "liner less" bores.

• ceramic coating sprayed directly on the aluminum block, eliminating the liner & reducing weight
• excellent heat dissipation for consistent power delivery
• coating enhances the thin film of oil between the cylinder & piston, reducing friction & increasing power

Lightweight, short-skirt, forged aluminum piston.

• lightweight design means faster throttle response
• reduced mechanical vibration for excellent durability

Piston oil cooler jet nozzle

• directs oil to the desired portion of the cylinder & underside of the piston
• reduces piston, cylinder & rod temperatures for excellent durability

Cylinder "cutaways" allow air "trapped" under the piston to enter a side chamber (or cutaway).

• reduces horsepower-robbing "pumping losses"

Crankcase also utilizes special "cutaways"

• reduces horsepower-robbing "pumping losses"
• crankcase cutaways match cylinder cutaways for maximum efficiency

Wet sump lubrication system.

• reduces weight & complexity versus a dry sump system

Easy access element-type oil filter & drain plug for fast oil changes.

38 mm Mikuni throttle body fuel injection system.

• system uses throttle position sensor (TPS)
• 12 hole injector with dual spray pattern for optimum fuel atomization
• fuel injection benefits include choke-free starting, steady idling during warm up, excellent fuel economy & reduced emissions

Wide ratio 6-speed transmission with heavy duty clutch

• optimized gear ratios for both on & off road riding
• transmission adopts a "shower type" lubrication system for great reliability
• 6th gear is an overdrive gear to reduce engine rpm at highway speeds
• clutch lever pull is light & easy
• Quick-access, lightweight aluminum outer clutch cover
• allows fast, easy access to the clutch

Easy access, 4.1 liter air box with foam air filter

• special intake control valve provides state of the art intake & emission control
• foam air filter is a washable design to reduce tune-up costs

Single, 9.5KW rad... located on right side, below steering head.

• electric cooling fan maintains consistent engine temperatures even in stop & go traffic or during technical off road riding

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

High performance direct ignition coil (ignition coil is built into the spark plug cap).

• reduces weight & complexity

Lightweight, compact "rare-earth-type" ACM (alternating current magneto).

• reduced weight
• 14V & 350W output

Upswept exhaust system

• stainless steel header pipe & a compact 3-stage expansion type muffler
• honeycomb catalyzer reduces exhaust emissions
• system maximizes engine power & allows hassle-free replacement of the oil filter element
• cleanable screen-type spark arrestor
• heat shields protect rider & passenger

Exhaust system also features Yamaha's EXUP System (Exhaust Ultimate Power Valve).

• single butterfly valve prevents the "blow back" phenomenon caused by "valve overlap"
• EXUP system eliminates "flat spots" in the power band & reduces emissions too.

Solenoid activated Air Induction System (AIS) reduces harmful exhaust emissions.

Heavy duty plastic water pump & stator cover guards.

CHASSIS

Lightweight, compact aluminum semi-double-cradle frame.

• main frame is cast aluminum, forged aluminum is used below the steering head area
• separate detachable down tubes are high tensile steel
• Yamaha has maintained the semi double cradle design to allow for "controlled flex" to optimize suspension performance

Detachable steel rear sub frame.

• constructed of round steel pipe
• detachable design provides easy rear suspension access & reduces costs in the event of loop out

Lightweight, tapered, aluminum swingarm.

• features a mix of extruded, cast & forged parts for an optimized rigidity-strength balance
• lightweight design reduces unsprung weight for optimum suspension performance
• excellent rear wheel control & traction

46mm, adjustable inverted, Kayaba cartridge fork with 270mm (10.6") wheel travel.

• adjustments include: 19-way compression damping and 17-way rebound damping
• suspension performance can be tailored to suit riding conditions & riding preferences

Cast aluminum upper triple clamp & forged aluminum lower triple clamp.

• reduces weight
• excellent & durability strength

Rugged plastic wrap around fork protectors.

• protection against dirt, mud & stone chips
• self-supporting design reduces friction for smoother fork operation

Fully adjustable, link, Monocross rear suspension with 270mm (10.6") of wheel travel.

• piggy-back style shock improves cooling & reduces shock fading
• shock adjustments include: spring preload, 12 way compression damping & 23 way rebound damping
• link-type design provides a rising rate (progressive) suspension function for good compliance on small bumps, yet able to absorb the big bumps with reduced bottoming

250mm floating front disc brake with "wave style" rotor & Nissin twin piston caliper.

• "wave" style rotor (disc) reduces weight, improves cooling (more surface area) & improves styling
• braking performance is excellent with great feel & control
• adjustable front brake lever

230mm rear disc utilizes a lightweight "wave style" rotor & Nissin single piston caliper.

• rugged, plastic rear caliper protector
• integrated Nissin rear master cylinder
• "wave" style rotor (disc) reduces weight, improves cooling (more surface area) & improves styling
• braking performance is excellent with great feel & control

7.6 liter steel fuel tank

• in tank electric fuel pump
• "reserve" portion of the tank is 2.1 litres (low fuel light illuminates)

Rugged, aluminum DID rims.

• 21 x 1.60 front & 18 x 2.15 rear rim sizes
• excellent durability
• reduces unsprung weight for optimal suspension performance
• straight pull spokes

Competition WR series inspired lightweight, digital meter assembly.

• 2 modes available
• basic mode features: speedometer, odometer, dual trip meters, & clock plus FI system diagnostics
• pace management mode features: stopwatch & distance-compensating trip meter

Slim design 60/55 watt halogen headlight.

Compact LED taillight

DETAILS

• Premium dual sport tires
• Passenger footpegs
• Serrated steel foot pegs, steel shifter with folding tip & aluminum rear brake lever
• Heavy duty "O" ring chain
• Lightweight chain guide helps reduce chance of chain derailment & helps protect rear sprocket
• Locking helmet holder
• Locking fuel cap & steering
• Oil level sight glass
• Low-maintenance sealed battery (battery should be charged during winter storage)