Universal Parts 41mm Cylinder Kit - Morini AD50

Bring a tired Morini AD50 two-stroke back to life with a fresh 41mm top end. This Universal Parts kit gives you the cylinder, piston and installation pieces for a 49cc standard-bore rebuild, so your scooter can get back to crisp starts and strong everyday pull without converting to a big-bore setup.

Key Features

• Rebuild the top end: Replace a worn cylinder and piston together with the matching rings, pin and gaskets.
• Standard 41mm bore: Retains the original 49cc-class displacement of the Morini AD50-style engine.
• Key parts together: Cylinder, piston, piston rings, piston pin, circlips, head gasket and base gasket.

Technical Specifications

• Brand: Universal Parts
• SKU: 185-1
• Engine: Morini AD50-style horizontal, air-cooled, reed-valve two-stroke
• Bore: 41mm
• Engine stroke: 37.4mm
• Cylinder overall height: 79.5mm
• Piston pin outer diameter: 10mm
• Piston overall height: 45mm
• Piston compression height: 19mm
• Exhaust bolt-hole spacing: 48mm

Compatibility

For Morini AD50 / Moto Morini / Franco Morini-type 50cc two-stroke applications, including the scooters below.

The Morini engine family also appears in Aprilia and KTM applications. Match the 41mm bore, 10mm piston pin and 48mm exhaust bolt spacing to your engine.

• Standard 41mm bore restores Morini AD50-style 50cc top end
• Cylinder, piston, rings, pin, circlips, head gasket and base gasket together
• 10mm piston pin and 48mm exhaust bolt spacing

Universal Parts cylinder kit SKU 185-1; Morini AD50-style horizontal air-cooled reed-valve 2-stroke; 41mm bore; 37.4mm engine stroke; 49cc class; cylinder height 79.5mm; piston pin OD 10mm; piston overall height 45mm; compression height 19mm; exhaust bolt-hole spacing 48mm; includes cylinder, piston, rings, pin, circlips, head gasket and base gasket.

Morini AD50/Moto Morini/Franco Morini-type 50cc 2-stroke applications: Benelli 491 ST; Derbi Vamos; Hyosung Morini AD50-powered scooters; Italjet Formula 50, Formula 50 LC, Torpedo 50, Velocifero 50; Malaguti Crosser CR1; TGB/Peirsport Peirspeed Bolero, Delivery, Key Largo, Key West, Laser R5, Laser R9, Outback, R50X, RM50, Sunset; Suzuki Address 50, AP50, AZ50, Hi-Up, Lets II, Mollet 50, SJ50-QT, Sepia 50, Sepia ZZ, Street Magic, TR50, Verde, ZZ. Morini engines also used by Aprilia and KTM; match 41mm bore, 10mm piston pin and 48mm exhaust bolt spacing.