Honda NSF250R Moto3 Bike

06/02/2011 @ 8:59 am, by Jensen Beeler14 COMMENTS

The wait is finally over, as Honda has completely taken the wraps off its 2012 Honda NSF250R Moto3 race bike. Launched at the Catalan GP today, the 250cc four-stroke machine will be one of several options aspiring MotoGP riders will pilot around in the Moto3 Championship. The new NSF250R incorporates a front-intake/rear-exhaust configuratiom, while the cylinder has been tilted back 15° to help concentrate the bike’s mass.

Titanium valves help power throughout the rev range, and the cylinder design reduces friction between piston and cylinder by offsetting the cylinder centerline and applying nickel silicon carbide (Ni-SiC) for the cylinder surface treatment. Matted to the motor is a six-speed gearbox, while the frame is based off the RS125R design, with modifications to suit the power delivered by the four-stroker. Total cost: €23,600, VAT included (Spain). Full technical specs are after the jump.

Honda NSF250R Technical Specifications:

Model name NSF250R
Model type MR03
Overall length × Overall width × Overall height(m) 1.809×0.560×1.037
Wheelbase(m) 1.219
Ground clearance(m) 0.107
Seat height(m) 0.729
Caster angle(degree) 22°36″
Curb weight(kg) 84
Fuel tank capacity(l) 11
Engine type liquid-cooled 4-stroke DOHC single cylinder
Displacement(cm3) 249.3
Bore × Stroke(mm) 78.0×52.2
Maximum power(kW/rpm) 35.5/13,000
Maximum torque(N・m/rpm) 28.0/10,500
Oil Capacity (ENG OIL/T.M OIL) (l) 1.27/0.55
Transmission Type Constant mesh
Gear ratio 1st 1.875
2nd 1.524
3rd 1.304
4th 1.167
5th 1.077
6th 1.000
Reduction gear ratio Primary 2.952
Secondary 2.333
Devices (Intake) IACV
Fuel supply system PGM-FI
Ignition type Full-transistor
Clutch type Wet multiplate
Lubricating type Semi-Dry Sump
Tire size Front 90/580R17
Rear 120/600R17
Rim size Front 2.50-17
Rear 3.50-17
Brake Front Type Hydraulic disk
Diameter φ296
Rear Type Hydraulic disk
Diameter φ186
Suspension Front Inverted telescopic
Rear Pro-link suspension system
Frame type Aluminum twin tube

Source: Honda World

  • Benjamin Rowland

    A road version of this would be a hoot! Built it Honda.

  • 76

    I want one, put me on the list

  • Westward

    I want one, and I am not even fond of Honda…

  • Jeram

    what a waste of a motorcycle…

    my 1999 honda 250 two stroke single cylinder dirt bike makes more power than this, has more torque, and doesnt have to rev stupidly high to achieve these specs….
    not to mention 10x longer rebuild intervals, and rebuilds that cost 5 times less

    Thus proving the fact of how inefficient four strokes are…

    what has the world come to!

  • Ed Gray

    More pictures please. I am puzzling over how the exhaust exits from under the rear of the belly pan but exits the rear of the cylinder. I am really surprised how unlike the motocrsoss engine this is described to be. I wonder if this is the furure MX engine layout. Double overhead cams? Yamaha is having considerable success with the reversed cyinder head. There is no doubt that we could whine on endlessly about the racing supeiority of two strokes, but technically the four strokes sure are insteresting.

  • Jeram

    @Ed Gray

    just seems funny that we all accept that going to this 4T format will be more complex and inferior to the 2T 125ers…

    yet we justify it by saying theyre ‘are interesting’

    flying to work in a human powered helicopter made from bread sticks…
    one of many activities just like the Honda NSF250R that are lacking practicality/ yet are interesting

    sure flying a bread stick helicopter to work is great fun!
    but when it rains and your bread goes soggy you’ll hear me fly past on my two stroke.

  • Ed Gray

    @ Jeram

    I’m not justifying i’m trying to look on the bright side. Also being a tech head i enjoy the tech side.

    Without question on the raw performance question two strokes are far superior. Also on the tech side what with direct injection and such maybe two strokes will make a come back.

  • Jeram

    Im just poking fun :)
    all good…

    also I thought that hondas justification for the 4T moto3 was reduced cost????
    so how come the bike costs $34,200 USD???

    How much did hondas basic off the shelf RS125 cost?

    seems like honda pulled the wool over our eyes once again

  • Jeram

    id also like to point out that the 1961 HONDA RC162 four stroke 250cc GP bike made the exact same 33KW/44HP @ 14000RPM

    weve come along way to end up back where we started

  • Ed Gray

    That is a fabulous piece of information, if true. Where did you get it? just imagine what sort of power they could get out of a purpose built 250-4cyl now.

    Back to this cost thing. Somehow the Moto2 bikes are rediculously cheaper than the full race 250s they replaced. I have afeeling that this 250 single is also cheaper than the bikes they leased to the factory supported 125 teams. However all bets are off if they establish factory moto3 teams. I forget are the rules built to contain this some how? Is there a claiming rule on the engines? I wish they would do that with the Moto2 bikes to get the other manufacturers in there.

    Gearhead comment again. I can’t wait to get a look at this engine.

  • Jeram

    I beleive the 250s were only expensive if you compaired the Honda Moto2 bike to the Aprilia/Derbi RSA250’s

    YAMAHA TZ250s and HONDA RS250s arent the most expensive bikes in the world

  • John

    At least it wasn’t styled by Honda’s Team Hideous squad – like the VFR1200 and CBR250. These bikes are the ugliest things I’ve seen since the CX500 Turbo and Suzuki’s original (Hans Muth-designed, if I remember coreectly) Katana.
    Hmmmm… One of these for Track Day enjoyment… Small enough to put technique above aggression and pure power, pretty enough to not offend aesthetic sensibilities. I may never race, but the apex is calling me…

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  • Jim Jones

    I’d like to point out that by 1966 Honda had the new and improved RC166 (250 cc six) was putting out over 60 horsepower but we haven’t come full circle because they left off 5 cylinders. Just think what they could do with five more cylinders and today’s material technology. And just think, all this and no smoke and ring-ding.