HRC NSR250 & NSR500 History

Conceived as a "complete replica" of Freddie Spencer's 1985 championship winning RS250RW, itself developed with many components common to the NSR500 NV0A to assist with the premier machine's evolution, the NSR250R project began in early 1986.

The following pages cover a brief history of the early NSR500s, upon which Spencer’s RS250RW NV1A was based, and a more in depth history of the NSR250 & RS250R from ’84 to ’92, and their often somwhat parallel relationship with the NSR250R production bike.

Official model names:

Although the production bike is commonly referred to as NSR250, its correct designation is NSR250R. In this history section the internal model codes will often be used to identify and differentiate between factory GP bikes, consumer race bikes, and production models.

Internal model codes:

Each model was designated with an internal code:

Gen.1 NSR250R – MC16 – HRC TT-FIII NH3A
Gen.2 NSR250R – MC18-I – HRC TT-FIII NH3B
Gen.3 NSR250R – MC18-II – HRC TT-FIII NH3C
Gen.4 NSR250R – MC21 – HRC TT-FIII NH3D*
Gen.5 NSR250R – MC28 – HRC SS/SP NKD

While officially named RS250RW, Freddie Spencer's 1985 NV1A was technically the first NSR250.

As an homage to the first purpose-built HRC 250 road racing machine, in 2002 the final iteration of the factory racer [internal code NJBx] was once again designated RS250RW.

INFO

MCxx designates a 250cc production model, and is used for both 2-stroke and 4-stroke models.

Eg. NS250R MC11 | NSR250R MC16 | CBR250R MC17

NOTE

True to form, there was some ambiguity between 1987-1990 regarding the NSR250RK TT-FIII production racers. An “RK” [Race Kit] kit was made available for each year to convert standard production bikes into race bikes, however in 1988, 1989, and 1990 complete pre-built bikes were also available to purchase direct from Honda/HRC, ready-to-race. These bikes were designated NH3x.

There was no difference between a complete NH3 bike sold by HRC and a fully kitted production bike. All parts were made available in the race kit, including the special HRC frames [stamped NH3], and swingarms, where applicable (’88/’89). The only difference was the customer was free to choose specific parts from the kit to suit their budget.

1990 was the final year of the TT-FIII championship in Japan, and consequently saw a dramatic drop off in support for the NSR250R by HRC. The new race classes were SS400 and SP [Sport Production], and saw a greatly reduced HRC parts lists year-on-year. HRC SS/SP parts were largely designated NKD, however a number of NH3 parts were still compatible, although not necessarily legal in the new classes.

It is of the opinion of NSR-WORLD.COM that NSR250Rs kitted with the majority of the HRC TT-FIII parts, regardless of spec, can be regarded as F3s*, however only complete bikes sold by HRC are classed as NH3/RK.

*See tip below.

TIP

A formula 3 [TT-FIII] NSR250R in today’s market is extremely valuable and sought after, so great care must be taken to ascertain the true specification of any bike claimed to be either NH3 or RK.

Very few true NH3s are known to have existed, and while many bikes on the market outside of Japan have claimed to be RKs over recent years, very few can be considered to meet the required spec.

CAUTION

HRC TT-FIII frames are stamped NH3, and were available to purchase independently from the RK manual.

Consequentially, an NH3 frame number is no guarantee that the bike itself is either an RK or HRC-supplied NH3.