Malossi Crankshaft (HQ) for Piaggio 125–180 2-Stroke (AC/LC) – Full Cheek for smooth, strong engine operation

If you want to reliably rebuild or stably tune your Piaggio Maxi 2-stroke engine, the Malossi HQ crankshaft is a first-class choice. Thanks to years of experience, state-of-the-art manufacturing, and a full cheek design, you get a crankshaft that impresses both as an upgrade for high-performance setups and as a precision-fit replacement for the original shaft.

The full round cheeks can slightly increase the pre-compression and simultaneously ensure that the engine runs with fewer vibrations. Especially in a single-cylinder 2-stroke, the operation feels extremely clean and pleasant – in the 52 mm standard stroke range, this Malossi shaft is truly unrivaled (only the available Evolution2 long-stroke crankshaft exceeds it).

The crankshaft is delivered including the piston pin bearing. Tip: It is best to order the matching bearing set directly with it.

Fitment Note: The crank cheeks have a 90 mm diameter and thus fit into all Piaggio Maxi 2-stroke housings – including variants with small crankcases such as SKR and Hexagon EX.

Advantages & Features

• Full cheek crankshaft (full cheek design)
• Suitable for high-performance engines and also perfect as a replacement for the original
• Engine operation with fewer vibrations due to full round cheeks
• Can slightly increase pre-compression (performance advantage in 2-stroke)
• Only in the standard stroke range of 52 mm – compatible with stock setups
• Highest quality bearings installed along with copper thrust washers
• Delivery incl. piston pin bearing

Technical Data / Specifications

• Stroke: 52 mm (as with the stock crankshaft)
• Connecting rod length: 105 mm (stock dimension)
• Piston pin diameter: 16 mm
• Crank cheek diameter: 90 mm

Compatibility (Vehicles)

Fits many vehicles from the Piaggio Maxi 2T environment, e.g., Gilera Runner 125/180, Piaggio Hexagon 125/150/180 as well as Piaggio Skipper – and other models with Piaggio 125–180 2-Stroke (AC/LC).

• Aprilia: SR 125 2-Stroke; SR 150 2001
• Gilera: Runner 180 SP 2-Stroke; Runner 125 FX 2-Stroke; Runner 180 FXR 2-Stroke; Runner 125 SP 2-Stroke
• Italjet: Dragster 125 2-Stroke; Dragster 180 2-Stroke
• Piaggio: Hexagon LXT 180 2-Stroke; Hexagon 125 2-Stroke; Hexagon 150 2-Stroke; Typhoon 125 2-Stroke 1997; Hexagon LX 125 2-Stroke; Skipper LX 125 2-Stroke; Skipper 125 SKR; Skipper 150 SKR

OEM Numbers (for comparison)

• 53 8906
• 538906