Crankshaft for Morini AD50 Engines for Scooters & Mopeds

Crankshaft for Morini AD50 Engines in Scooters and Mopeds

This crankshaft suits Morini AD50 engines found in a range of scooters and mopeds, among them models from Hyosung, Suzuki, and TGB. It forms a key part of the engine assembly, linking the components that carry power through the drivetrain. Compared with many engine internals, it is one of the more straightforward scooter engine parts to fit and swap out when maintaining a vehicle.

Build and Fit Notes

The crankshaft has a left-hand thread on the variator side, matching the original part so it lines up without modification. It is made to the requirements of the Morini 50cc, 2-stroke engine.

Signs It May Be Time to Replace

A new crankshaft may be needed if the engine loses performance, vibrates unusually, or has been taken apart for other repairs. Checking the engine regularly makes it easier to spot wear, which helps keep the scooter running smoothly.

Specifications

• Overall Length: 10 inches
• Flywheel Thread Size: M10x1.25
• Flywheel Thread Length: 17mm
• Drive End Thread Size: M12x1.25
• Drive End Thread Length: 8mm
• Inner Diameter (piston pin hole): 14mm
• Fits: Morini AD50 engines on TGB, Peirspeed, Suzuki, Benelli and Italjet 50cc scooters

Fitment

Fits:

• TGB 101R, 101S, 203, 303R, Delivery 50, F409, R50X
• Peirspeed Key West, Outback, R50X, Sunset
• Suzuki Address 50, Street Magic
• Benelli 491ST
• Italjet Formula 50, Torpedo 50, Volicefero 50

How to choose: Measure your crankshaft: overall length 10 inches, flywheel thread M10x1.25 (17mm long), drive end thread M12x1.25 (8mm long), piston pin hole 14mm.

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