How to Restore a Vespa

Vespa 1963 GS 150 Restoration

The restoration covered here is of a VBS Vespa, with GS specification modifications. Scooter restoration specialists AllVespa performed the restoration. The scooter started out as a 1963 VBC with a 150-cc engine. Although this restoration was performed by a professional company, it gives the private owner/restorer an insight into what is required to make the older Vespa's serviceable again.

The Vespa was purchased and restored by AllVespa in Vietnam where the scooter has been a popular form of transport for many years. Although the Vespa's have proven to be reliable machines, the company disassembles every machine to check for damage or cracks on the chassis which may need welding. (Anyone restoring one of these classic scooters is well advised to follow this example).

Chassis Checks

Disassembly of a scooter ideally should be done on a lift to put the scooter at decent working height. This is particularly important with scooters as many of their mechanical components are located below the body/chassis panels (similar to a car).

Although the pressed steel chassis has proven to be very robust, it is essential to have the paint removed by sand or grit blasting. This process will give the mechanic chance to fully inspect the chassis.

In addition, cracked paint can give the appearance of a more serious crack in the steel below it. (Cracked paint is a good indication of movement and the mechanic should photograph any suspect areas so that a more detailed inspection can be made once the paint has been removed).

The paint used on this restoration is made by I.C.I.(now owned by the Akzo Nobel Group).

Parts Replacement

As with most restorations, it is prudent to replace certain components. In this restoration the following components were replaced for safety and reliability reasons (and appearance in some cases):

• Rubber hoses
• Brake shoes
• Front and rear shocks
• Springs
• Tires and tubes
• Control cables
• Odometer
• Locks
• Electrical wiring
• Leg and fender shield trim
• Floor strips
• Rubber trim
• Exhaust system

Engine Rebuild

In addition, the 150-cc engine was fully rebuilt. Although the Vespa 2-stroke is a relatively reliable design, wear on certain components is inevitable. In particular, the 2-stroke lubrication system gives only a minimal amount of lubrications to pistons and crank bearings, but at the same time the burnt oil (after combustion) will slowly build up in the muffler and around the exhaust port, which will greatly reduce performance.

During the rebuild of the engine the following components were replaced or reconditioned:

• Cases were cleaned and grit blasted
• Cylinder
• New piston and rings
• Crankshaft assembly
• Crank and gear bearings
• Crank oil seals
• Complete gasket set

Finished Product

The finished scooter is as good as new, or even better with the addition of an expansion chamber.