The Honda NX250 was a new concept produced by Honda, a crossover dual-sport motorcycle available in the USA from 1988 thru 1990. It is a lightweight bike intended for both on-road and off-road riding.

The NX250 featured a new liquid cooled, 249 cc, single cylinder, four-valve, D.O.H.C, four-stroke engine with electric start. It had a bore and stroke of 70 millimetre, 11 to 1 compression ratio

Compression ratio

The 'compression ratio' of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity...

, and a six-speed transmission.

The suspension is 37 mm (1.5 in) forks with 8.7 inches travel up front, and Pro-Link with 7.9" in the rear. It has a 1350 mm (53.1 in) wheelbase and a dry weight of 118 kg (260.1 lb). The seat height is 820 mm (32.3 in).

In some countries Honda continued production of the NX250 up to 1993, where it was named "Dominator".

AX-1

Another version of Honda NX-250 was the Honda AX-1 intended only for the Japanese market. Using the same chassis as the NX-250, the AX-1 came standard with alloy rims, aluminum Pro-Link rear suspension this time with a rear disc brake, dual round headlights, taller cams, stainless steel exhaust and different carburetor settings. The valve clearance check interval is every 24000 miles (38,624.2 km).