June 2, 2011
Honda today unveiled its 2012 Moto3 race machine and provided complete specifications and European MSRP (23,600 Euro delivered in Spain, VAT included).
Powered by a 249cc 4-stroke single with front intake/rear exhaust (sounds like Yamaha’s latest 450cc motocross bike), the high revving machine features a six-speed transmission and nimbleness that “goes beyond the RS125R” two-stroke (according to Honda). The switch to four-stroke power did not hurt aerodynamics either, according to Honda. Here is the Honda press release, followed by full specifications for the NSF250R.
TOKYO, Japan, June 2, 2011 — Honda Racing Corporation will launch the NSF250R, a newly developed machine for the Moto3 class that will be added to the FIM Road Racing World Championship Grand Prix (WGP) in 2012. Sales of the new vehicle are planned to start in December 2011.
In developing the NSF250R, Honda took the “Next Racing Standard” as its development concept and reaped the benefits of racing technology cultivated in the RS125R, thereby achieving a high-level combination of outstanding controllability and racing competitiveness.
The liquid-cooled, 4-stroke, single cylinder, DOHC, 249 cc engine was specifically designed for Moto3 to be lightweight and compact while delivering high output. To achieve this high output together with excellent responsiveness, the machine incorporates a front-intake/rear-exhaust configuration with high charging efficiency, while adopting a layout with the cylinder tilted back 15° to concentrate mass.
To ensure power delivery all the way through to the high rpm range, the NSF250R adopts titanium valves for both the intake and exhaust to reduce friction. Furthermore, the design reduces friction between piston and cylinder and improves durability by offsetting the cylinder centerline and applying nickel silicon carbide (Ni-SiC) for the cylinder surface treatment. The easily replaceable cassette design selected for the close-ratio 6-speed transmission, allows gear selection to be optimized over a large variety of racing circuits.
The frame ensures a degree of freedom in cornering and nimbleness that matches and goes beyond the RS125R by revising the rigidity balance and the shape while inheriting the compactness of the RS125R. Even though the basic structure of the front and rear suspension is the same as the RS125R, the NSF250R-exclusive settings produce a machine with excellent riding stability.
The cowling makes the NSF250R the equal of the RS125R in aerodynamic performance, while a cooling duct on the under cowl improves the engine’s cooling performance.
As a new-generation road racing machine that complies with Moto3 regulations, the NSF250R will help revitalize road racing while meeting the expectations of road racers.
NSF250R SpecificationsModel nameNSF250RModel typeMR03Overall length × Overall width × Overall height(m)1.809×0.560×1.037Wheelbase(m)1.219Ground clearance(m)0.107Seat height(m)0.729Caster angle(degree)22°36″Curb weight(kg)84Fuel tank capacity(l)11Engine typeliquid-cooled 4-stroke DOHC single cylinderDisplacement（cm3）249.3Bore × Stroke(mm)78.0×52.2Maximum power（kW/rpm）35.5/13,000Maximum torque(N･m/rpm)28.0/10,500Oil Capacity (ENG OIL/T.M OIL) (l)1.27/0.55TransmissionTypeConstant meshGear ratio1st1.8752nd1.5243rd1.3044th1.1675th1.0776th1.000Reduction gear ratioPrimary2.952Secondary2.333Devices (Intake)IACVFuel supply systemPGM-FIIgnition typeFull-transistorClutch typeWet multiplateLubricating typeSemi-Dry SumpTire sizeFront90/580R17Rear120/600R17Rim sizeFront2.50-17Rear3.50-17BrakeFrontTypeHydraulic diskDiameterφ296RearTypeHydraulic diskDiameterφ186SuspensionFrontInverted telescopicRearPro-link suspension systemFrame typeAluminum twin tube