Morini Moped Engines

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The most common Franco Morini engines used on mopeds. All information is for Factory Stock engines unless otherwise noted.

See Morini Engine Parts for replacement parts information.

Service Manuals for the MO1, MO2 and M1 can be found here: Service Manuals


MO1

Franco Morini MO1 Engine breakout diagram.

Manufacture Years: 1976-79

  • Displacement: 49.6 CC
  • Compression Ratio: 8:1
  • Compression: 110 lbs. (70 lbs. min.)
  • Intake: Piston port
  • Cooling: Air Cooled
  • Bore: 40.4 mm
  • Stroke: 39.0 mm
  • Ignition: Magneto 6V 23W
  • Flywheel: Counter Clockwise
  • Point Gap: .014-.018 (.35mm-.45mm)
  • Ignition Timing: 23° BTDC
  • Spark Plug: NGK BP6ES / Bosch W175T30 / Champion N9Y
  • Ignition Coil: Frame Mounted
  • Transmission: Single speed automatic
  • Transmission Oil Capacity: 12oz 20W Non-Detergent
  • Clutch: Single Centrifugal

Gear Ratio

  • Transmission (Primary): Z.52/22 = 1:2.36
  • Internal Gears: Z.26/10 = 1:2.6
  • Overall Gear Ratio: 1:6.145

MO2

Franco Morini MO2 Engine breakout diagram.

Manufacture Years: 1977-80

  • Displacement: 49.6 CC
  • Compression Ratio: 8:1
  • Compression: 110 lbs. (70 lbs. min.)
  • Intake: Piston port
  • Cooling: Air Cooled
  • Bore: 40.4 mm
  • Stroke: 39.0 mm
  • Ignition: Magneto 6V 23W
  • Point Gap: .014-.018 (.35mm-.45mm)
  • Ignition Timing: 23° BTDC
  • Spark Plug: NGK BP6ES / Bosch W175T30 / Champion N9Y
  • Ignition Coil: Frame Mounted
  • Transmission: Dual Speed Automatic
  • Transmission Oil Capacity: 1 Pint 20W Non-Detergent
  • Clutch: Dual Centrifugal

Gear Ratio

  • Transmission (Primary) - 1st Gear: Z.15/59 = 1:3.933 / - 2nd Gear: Z.22/52 = 1:2.36
  • Internal Gears: Z.26/10 = 1:2.6
  • Overall Gear Ratio: 1:6.145

M1

Franco Morini M1 Engine breakout diagram.

Manufacture Years: 1979-85?

  • Displacement: 49.6 CC
  • Compression Ratio: 8:1
  • Compression: 110 lbs. (70 lbs. min.)
  • Intake: Case Inducted Reed Valve
  • Cooling: Air Cooled
  • Bore: 40.4 mm
  • Stroke: 39.0 mm
  • Ignition: Magneto 6V 23W
  • Flywheel: Counter Clockwise
  • Point Gap: .014-.018 (.35mm-.45mm)
  • Ignition Timing: 23° BTDC
  • Spark Plug: NGK BP6ES / Bosch W175T30 / Champion N9Y
  • Ignition Coil: Frame Mounted
  • Transmission: Single speed automatic
  • Transmission Oil Capacity: 12oz 20W Non-Detergent
  • Clutch: Single Centrifugal

This information under review.

Gear Ratio

  • Transmission (Primary): Z.52/22 = 1:2.36 (From the repair Manual) - Z.67/19
  • Internal Gears: Z.27/10 = 1:2.6
  • Overall Gear Ratio: 1:6.145

M101

Franco Morini M101 Engine breakout diagram.

Manufacture Years: 1981-85?

  • Bore: 40.4mm
  • Stroke: 39.0mm
  • Capacity: 49.9 cm3
  • Compression: 9:1
  • Spark Plug: BP6ES / Bosch W175T30 / Champion N10Y
  • Timing: 1.5mm BTDC
  • Point gap: 0.30 mm to 0.40mm
  • Transmission: Automatic varatior (Dual Variated)
  • Transmission ration: 15.96 to 10.03
  • Ignition: Clockwise CEV Points Magneto 6V 23W
  • Transmission Fluid: 300 cm3 SAE 10W40 Motor Oil.