Honda MTX125R

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Honda MTX125R
Also called MTX 125 R
Production 1982 - 85
Class Dual purpose
Two stroke, single cylinder, liquid cooled
Compression ratio 7.6:1
Top Speed 121.2 km/h / 75 mph
Horsepower 18.1 HP (13.5 KW) @ 8700RPM
Fuel System Carburetor
Ignition CDI
Transmission 6 Speed
Suspension Front: Air adjustable hydraulic forks
Rear: Pro-link non adjustable
Brakes Front: Drum
Rear: Drum
Front Tire 2.75 -21
Rear Tire 4.10 -18
Weight 99 kg / 218 lbs (dry), 105.0 kg (wet)
Recommended Oil Honda GN4 10W-40
Fuel Capacity 9 Liters / 2.3 US gal
Related Honda MTX200R
Manuals Service Manual

The Honda MTX 125R was a Single cylinder, two-stroke, liquid cooled [Dual sport]] motorcycle produced by Honda in 1982. Claimed horsepower was 18.1 HP (13.5 KW) @ 8700 RPM. It could reach a top speed of 121.2 km/h / 75 mph.


The engine was a Liquid cooled cooled Two stroke, single cylinder.. The engine featured a 7.6:1 compression ratio.


It came with a 2.75 -21 front tire and a 4.10 -18 rear tire. Stopping was achieved via Drum in the front and a Drum in the rear. The front suspension was a Air adjustable hydraulic forks while the rear was equipped with a Pro-link non adjustable. The MTX125R was fitted with a 9 Liters / 2.3 US gal fuel tank. The bike weighed just 99 kg / 218 lbs.


Honda MTX125R Honda MTX125R


Honda introduced a series of light motorcycles in the US and in Europe. Honda's production lines of these models were in Spain, Belgium and Sweden.

Because of important law and insurance changes the sales in these types of light motorcycles decreased enormously. As a result, production in Spain and Belgium came to a standstill in 1992. MBX production lasted another year and stopped in 1993. Only in Scandinavia a limited production for the local market lasted until 1997. After that Honda's M productions came to an end.

There were 50, 80, 125 variants of both the MBX and MTX as well as a 200c version of the MTX - all two-stroke singles - and the related MVX250 water-cooled two-stroke V3.

The MTX125/200R started life in 1983 as RFD models and were ungraded in 1985 into the RFF. Changes includes dropping the drum brake at the front and replacing with a disc, bigger forks, revised graphics, a revised rear shock, revised CDI and, in the case of the 200, a new swingarm. The 125 cc motorcycle come in both restricted and de-restricted form. The de-restricted version and the 200 cc version had ATAC chambers operated by a piston valve attached to a mechanical governor.

The stock MB8 uses a two-ring 45mm piston and 50.8mm stroke – compared to the 41mm stroke of the MB5

Make Model Honda MTX 125R
Year 1982 - 85
Engine Type Two stroke, single cylinder.
Displacement 124 cc / 7.6 cu-in
Bore X Stroke 56 х 50.6 mm
Cooling System Liquid cooled
Compression 7.6:1
Induction 24mm Keihin carburetor
Ignition CDI
Starting Kick
Max Power 18.1 hp / 13.4 kW @ 8700 rpm
Max Torque 15.5 Nm / 11.5 lb-ft @ 7200 rpm
Transmission 6 Speed
Final Drive Chain
Front Suspension Air adjustable hydraulic forks
Front Wheel Travel 230 mm / 9.0 in
Rear Suspension Pro-link non adjustable
Rear Wheel Travel 200 mm / 7.8 in
Front Brakes Drum
Rear Brakes Drum
Front Tire 2.75 -21
Rear Tire 4.10 -18
Dry Weight 99 kg / 218 lbs
Fuel Capacity 9 Liters / 2.3 US gal
Consumption Average 20.6 km/lit
Braking 60 - 0 / 100 - 0 15.2 m / 40.1 m
Standing ¼ Mile 16.9 sec / 116.4 km/h
Top Speed 121.2 km/h / 75 mph