Honda NSF250R Moto 3

Racing Bikes Honda NSF250R Moto 3
Production	2012
Class	Racing
Engine	Liquid-cooled, four stroke, single cylinder, DOHC
Ignition	Full-transistor
Transmission	Clutch: Wet multiplate
Frame	Aluminum twin tube
Suspension	Front: Inverted telescopic Rear: Pro-link suspension system
Brakes	Front: Single 296mm Hydraulic disc Rear: Single 186mm Hydraulic disc
Front Tire	90/580R17
Rear Tire	120/600R17
Wheelbase	1.219 mmm
Seat Height	729 mm
Weight	84 kg (wet)
Recommended Oil	Honda GN4 10W-40
Fuel Capacity	11 Liters
Manuals	Service Manual

Engine

The engine featured a compression ratio.

Drive

Power was moderated via the Wet multiplate.

Chassis

It came with a 90/580R17 front tire and a 120/600R17 rear tire. Stopping was achieved via Single 296mm Hydraulic disc in the front and a Single 186mm Hydraulic disc in the rear. The front suspension was a Inverted telescopic while the rear was equipped with a Pro-link suspension system. The Honda NSF250R Moto 3 was fitted with a 11 Liters fuel tank. The wheelbase was 1.219 mmm long.

Photos

Overview

Honda NSF 250R Moto 3

A press kit issued by Honda said: "The NSF250 engine was developed exclusively for road racing, to ensure superior quality and greater potential for commercial racing machine. With a development concept of "lightweight, compact, high output and efficiency," numerous technological advances were introduced to create an engine befitting a racing machine.

"The DOHC single-cylinder 249cc engine demonstrates a racing machine's power delivery and response, with intake from front and exhaust to rear to improve air charging efficiency, and a cylinder tilted back 15 degrees to concentrate the engine’s mass, primarily to improve its stability. In order to deliver ample power into the high rpm range, the DOHC system incorporates titanium valves for both intake and exhaust (Honda patented).

"The new design also offers improved air charging efficiency along with ram-air intake, thanks to the straight intake port and throttle body with 50-mm diameter bore. In shaft layout, the balancer shaft is placed above the crankshaft to make the engine shorter and concentrate the mass."

Explaining details of the chassis concept, Honda said it was heavily based on the RS125R chassis.

"The NSF250R’s frame is based on the RS125R’s proven unit. To optimise the rigidity in balance and torsion of a 4-stroke engine, frame specifications were determined from actual riding tests and CAE analysis. For the front engine hanger and the main pipe section, optimum balance was achieved mainly by enhancing torsional rigidity.

"A newly configured swing-arm and frame body also resulted in a structure allowing smooth torsional characteristics. On the whole, stability during braking is improved, and a leeway and nimbleness during cornering exceeding those of the RS125R is ensured. The frame offers superb handling so that riders will not feel the weight increase of a 4-stroke engine, even when approaching corners."

Make Model	Honda NSF250R Moto3 MR03
Year	2012
Engine Type	Liquid-cooled, four stroke, single cylinder, DOHC
Displacement	249.3
Bore X Stroke	78.0 × 52.2 mm
Compression
Fuel Supply System	PGM-FI
Ignition	Full-transistor
Oil Capacity (eng Oil/t.m Oil)	1.27 Liters / 0.55 Liters
Clutch	Wet multiplate
Lubricating Type	Semi-Dry Sump
Max Power	35.5 kW @ 13000 rpm
Max Torque	28 NM @ 10500 rpm
Transmission / Drive	6 Speed / chain 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
Frame	Aluminum twin tube
Front Suspension	Inverted telescopic
Rear Suspension	Pro-link suspension system
Front Brakes	Single 296mm Hydraulic disc
Rear Brakes	Single 186mm Hydraulic disc
Front Tire	90/580R17
Rear Tire	120/600R17
Caster Angle	22°36″ degree
Dimensions	Length 1809 mm Width 560 mm Hieght 1037mm
Wheelbase	1.219 mmm
Wet Weight	84 kg
Seat Height	729 mm
Ground Clearance	107 mm
Fuel Capacity	11 Liters