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Maico MD 125

Make Model	Maico MD 125
Year	1971 - 76
Engine	Single cylinder, two stroke, ritary vale inlet
Capacity	124 cc / 7.6 cub in.
Bore x Stroke	54 x 54 mm
Cooling System	Air cooling
Compression Ratio	11:1
Oil/Fuel Mixture	1:25
Exhaust	Single, chrome, left side
Ignition	Flywheel magneto, Bosch
Fuel System	Bing slide carburetor, 26 mm
Starting	Kick
Max Power	11.7 kW / 15.9 hp @ 7800 rpm
Clutch	Wet, cable operated
Transmission	6-Speed
Final Drive	Chain
Frame	Double cradle, tubular
Front Suspension	Marzocchi forks
Rear Suspension	Swing arm with 2 spring legs
Front Brakes	Drum, aluminium full hub, 136 mm
Rear Brakes	Drum, aluminium full hub, 136 mm
Wheels	Steel alloy, laced wire spokes
Front Tyre	2.50 x 16 in.
Rear Tyre	3.00 x 16 in.
Wet Weight	99 kg / 218 kg
Fuel Capacity	13.5 L / 3.6 US gal
Colours	Red, Blue, Orange
Top Speed	125 km/h / 77.7 mph

A completely new generation of Maico road-going prototypes were presented in 1964 at IFMA. These were the 50cc and 125cc MD series. "M" stood for Maico and "D" for Drehschieber (rotary valve). However, there were still many problems to overcome with these new disc-valve, two-stroke engines. These were solved by new Development Engineer Günther Schier, who came from Rotax, in Austria, in 1966.

Production took off in 1967 with the MD125 11hp, with yearly updates to follow until 1975. These 125cc MD Maicos were very fast from the beginning. While the 1968 MD125SS road-going model had a class leading 14.5 hp (upped to 16hp in 1971) and an exclusive six-speed gearbox, this output was still far from what the design would eventually achieve. For example, the Maico RS production racer, based heavily on the road bike, achieved 24 to 26hp and created some serious stir among the prevailing Yamaha TA racers on the track.