Honda introduced their new NSF250R racer for the Moto3 class beginning in 2012. The 250cc 4 stroke single will be replacing the RS125R 2 stroke and, from the description and specs, it’s just as diminutive as the old 125.
From the tech side of things, the 185 pound racer makes about 47 horsepower with a front intake, rear exhaust arrangement on a cylinder tilted back 15 degrees. A cassette style 6 speed gearbox means easy gearing changes.
Honda says: “The frame ensures a degree of freedom in cornering and nimbleness that matches and goes beyond the RS125R,” which is another way of saying you can practically lay this thing flat in the corners. It also equals the 125 in aerodynamic performance.
It’s amazing what you can pack into a tiny package. They’ll be on sale to racers December 2011 for about $35,000.
Honda press release:
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.