Honda NSR125

Honda NSR125

1998 NSR125R
Manufacturer	Honda
Production	1988-2001
Successor	Honda CBR125R
Class	Sport bike
Engine	124 cc single-cylinder 2-stroke
Bore / Stroke	54 × 54.5 mm (2.1 × 2.15 in)
Power	28 bhp (21 kW) @ 10500 rpm
Torque	1.92 kgf (13.9 ft·lb) @ 9800 rpm
Transmission	6-speed manual
Brakes	Single disc with 2 piston caliper (F) Single disc with single piston caliper (R)
Tires	100/80-17 Pirelli MT-45 (F) 130/70-17 Pirelli MT-45 (R)
Dimensions	L 2,075 mm (81.7 in) W 670 mm (26 in)
Seat height	800 mm (31 in)
Weight	138 kg (300 lb) (dry)
Fuel capacity	13 L (3.4 USgal)
Related	Honda NSR150

The Honda NSR125 is a 2 stroke, 125 cc (lightweight) sport bike produced between 1988 and 2001. The high revving (red zone of the tachometer begins at 11,000 rpm), 2 stroke, RC-Valve equipped, single-cylinder engine produced around 30 bhp (22 kW) at the crank. The name is taken from the NSR 500 GP bike which proved great success on the track.

History and Development

There were 2 models of the NSR125; An alcast version and foxeye produced between 1988 and 1994. The later "fox eye" model, the JC22, (named due to its front lights resembling that of a fox's eyes) was produced between 1993 and 2003.

Following the success of the NS125(an earlier model to the NSR), the NSR125-JC20 was designed and assembled by Honda Italia Industriale S.P.A. in Rome, Italy. Grimeca was contracted to produce the Alcast frame (2-piece, die-cast, bolt together construction), wheels and brake assemblies. The engine was manufactured by Girardoni with Dellorto equipping the carburetor. Marzochi supplied forks and suspension while Pagani provided instrumentation and lighting. The Grimeca rear wheel was 18", front 17" and shod in Pirelli MT-45 tires. The NSR125-JC22 is mostly of Japanese manufacture, with the engine parts and other key elements of the running of the motorbike produced in Japan, it was then assembled in Italy and supplied to its mainly European market. Design changes saw the JC22 receive a steel fuel tank and visual trim resembling the NR750.

Although it is a common mistake to believe the NSR continued production until 2003. This is not the case as they ceased production in 2001 but had leftover stock until 2003/4.

The Honda NS125 which was available as an "F" naked, or "R" fully faired is commonly mistaken as an NSR of earlier production, although shares no real parts or design similarities. This model is most easily identifiable by its singular square headlight, rather than the earlier NSR's dual round headlights or the later NSR's 'foxeye' design.

Model Regional Differences

Italy

This has the frame number ZDCJC22A or ZDCJC22D (D is a sport styling model.)

This bike has restrictions in the exhaust.

UK

This has the frame number ZDCJC22C******

The restrictions on this bike are in the exhaust and the intake tract.

France

This has the frame number ZDCJC22B******

This is heavily restricted in both the exhaust, intake and also electrical restrictions.

Switzerland

This has the frame number ZDCJC22E******

This has a many restrictions to keep within Switzerland's strict speed and noise pollution law the engine cannot run past 7500 rpm.

Japan

This has the frame number HI-JC20[star]1****[star]

This has a 26 mm carb instead of the JC22s 28 mm and an air intake restriction.

Specifications

Specifications for the Honda NSR125 that are manufacture claimed or estimated.

Engine and Transmission

- Displacement: 124.00 cc

- Engine type: 2-cycle, single-cylinder

- Torque: 1,98 Kpm/9000 rpm (unrestricted)

- Power: 28 hp/10500 rpm (unrestricted)

- Bore x stroke: 54.0 x 54.5 mm

- Gearbox: 6-speed

- Transmission type final drive: Chain

- Tank volume: 13 litres (incl. reserve)

Physical Measures

- Dry weight: 138.0 kg

- Seat height: 800 mm

- Overall length: 2,075 mm

- Overall width: 670 mm

Chassis and Dimensions

- Chassis: Die-cast aluminium

- Front tyre dimensions: 100/80-17

- Rear tyre dimensions: 130/70-17

- Front brakes: Single disc with 2 piston Grimeca callipers

- Rear brakes: Single disc with 1 piston Grimeca callipers