Restore the primary heart of your engine with this premium Replacement Crankshaft Assembly for Vintage Vespa P/PX Series scooters. Engineered to precise factory specifications, this crankshaft delivers optimal balance, high-tensile durability, and consistent rotational inertia required to eliminate engine vibration and preserve the life of your main bearings.
A worn or out-of-true crankshaft can cause severe crankcase damage, ignition timing drops, and accelerated oil seal failure. Replacing your old crank during a full engine split ensures smooth power delivery and factory-spec compression.
Product Features
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Precision Ground Journals: Ensures an exact, press-fit alignment with standard main bearings.
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High-Strength Connecting Rod: Equipped with robust top and bottom wrist pin bearings engineered to handle continuous high-RPM urban riding.
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Factory Balanced: Minimizes rotational harmonic vibration, protecting your stator assembly and clutch basket.
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Direct Vintage Fitment: Keyways and taper profiles are cut to exact vintage dimensions for seamless flywheel and clutch integration.
Specifications
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Engine Displacement Range: 125cc – 150cc
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Stroke Type: Standard Stock Stroke
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SKU: 133154
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Weight: 5.25 lbs
Model Fitment & Compatibility
This crankshaft is designed specifically for Large Frame Vespa models utilizing 125cc to 150cc engines. It is NOT compatible with Vespa P200E / PX200 models or Small Frame variants (50/90/Primavera).
| Series |
Compatible Model Variants (125cc - 150cc) |
| Vespa P-Series |
P125X, P150X (Early Non-EFL / Non-Disc Models) |
| Vespa PX-Series |
PX125, PX150 |
| Stella / LML |
LML Star / Genuine Stella 2-Stroke (150cc) |
Mechanic's Installation Note: Always replace your main bearings, flywheel-side oil seals, and clutch-side oil seals whenever installing a new crankshaft. Ensure your woodruff keys are fully seated before torquing down the flywheel or clutch assembly to prevent shearing.
California Prop 65 Warning
