Honda MVX250F

1983 Honda MVX250F
Manufacturer	Honda
Production	1983 - ?
Successor	Honda NS250R, Honda NSR250R, NS250F
Class	sport bike
Engine	249 cc 90° V-Three Liquid Cooled Two-Stroke Crankcase Reed Valve Induction
Top speed	178 km/h
Power	29.8kW (40 hp) @ 9000 rpm
Torque	31.4mN (23.2 ft.lbs) @ 8500 rpm
Transmission	Six speed constant mesh. Chain drive.
Suspension	front: telescopic (with air spring cylinder) rear: Swing arm
Brakes	Inboard single disc front and rear
Tires	Front: 110/90/ 16" Rear: 110/80 18"
Wheelbase	1370 mm (53.9")
Dimensions	L 2010 mm (79.1") W 735 mm (28.9") H 1155 mm (45.5")
Seat height	780 mm
Weight	138 kg (304.2 lbs) (dry)
Fuel capacity	17 litre

The Honda MVX250F motorcycle was developed by Honda. It was powered by a two-stroke V3 engine.
New Zealand was among the few countries in the world outside Japan where the MVX 250 was sold new through Honda motorcycle dealerships.
In 1984 the MVX 250 was sold new for $3299 New Zealand dollars.
Initially many bikes suffered engine failures, often within the warranty period. Honda released a number of engine upgrades including a larger rear conrod to address engine balance issues in an effort to improve engine reliability. After prolonged periods of full throttle many engines suffered piston failure on the rear cylinder. There is much anecdotal evidence to suggest that incorrect ignition timing was the cause of piston failures and subsequent engine seizures.

1983 MVX250F

Models

There is only one model.
However, probably due to the model initially experiencing mechanical failure, changes were made to the rear cylinder. The conrod, small end bearing, and piston were revised.
Also, the head gaskets (may?) have been modified to allow for better coolant flow to the rear cylinder.

MVX250F Engine (250 cc V3 2-stroke).

Engine

The engine is a water-cooled 90° V3 249 cc two-stroke. The engine sits in the frame with the two outer cylinders facing horizontally forward and the rear cylinder facing vertically upward.