“Grandma’s Yellow Scooter”

1981 Yamaha SA50 Passola

Restore • Recondition • Recommission

This 1981 Yamaha Passola SA50 arrived at Quadrant Motorcycles carrying far more than mechanical history — it carried family history, memory and nostalgia spanning generations.

Originally purchased new by the current owner’s father for his mother, the little yellow Yamaha became a familiar sight on the rural roads of County Cavan, Ireland throughout the 1980s and early 1990s. Used for journeys to Mass, local shops and neighbouring villages, the Passola became something of a local icon, affectionately remembered by many as “Mrs. Clarke’s wee yellow bike.”

Following the owner’s grandmother’s passing, the motorcycle remained untouched in a family shed for decades. Last used on the road in 1994, the bike sat quietly preserved in time until the current owner entrusted Quadrant Motorcycles with a very personal project — a surprise restoration for the wider family, many of whom remained in Ireland and America.

The brief was clear from the outset: preserve the soul and originality of the motorcycle while sympathetically restoring it to reliable running condition for future generations to enjoy.

Quadrant Motorcycles carried out a full restoration, reconditioning and recommissioning programme including:

  • Complete Yamaha Passola engine rebuild

  • New piston, connecting rod and full bearing replacement

  • New main bearings, big-end bearings and little-end bearings

  • Full gasket and seal replacement throughout

  • Crankcases, cylinder head and barrel vapour blasted

  • Cylinder barrel refinished in correct paint finish

  • Carburettor fully stripped, cleaned and rebuilt

  • Oil injection system stripped, cleaned and recommissioned

  • Vacuum-operated fuel system rebuilt with new diaphragms, hoses and seals

  • Centrifugal clutch and transmission fully stripped, cleaned and rebuilt

  • New tyres, inner tubes and brake shoes fitted

  • New control cables installed throughout

  • NOS complete exhaust system sourced and fitted

  • Rare NOS floor panel sourced from Australia due to severe corrosion in the original component

  • Wheels and fuel tank refinished in an off-white tone to the customer’s request

  • Original plastics carefully cleaned and polished, preserving factory decals and originality

In keeping with the sentimental nature of the project, many original touchpoints were intentionally retained rather than over-restored. The original frame was carefully cleaned and preserved in its factory finish, while the original seat and handlebar grips used daily by the owner’s grandmother were sympathetically cleaned and retained as a direct connection to the motorcycle’s past.

Alongside the restoration itself, Quadrant Motorcycles also assisted with international shipping logistics, re-registration support and return-to-road preparation for use once again in the Republic of Ireland.

The emotional response following the surprise reveal exceeded all expectations. Family members across Ireland and America were brought to tears seeing the little Yamaha returned to life after more than 30 years. Today, the Passola remains in regular family use, with multiple generations now taking turns riding Grandma’s wee yellow motorcycle once again.

Quadrant Motorcycles specialises in classic motorcycle restoration, vintage motorcycle recommissioning and sympathetic preservation projects from our workshop in Donington, East Midlands, UK.

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Close-up of a yellow construction machine with dirty white and black parts and tools around on a gravel surface.
Close-up of a vintage yellow Passola motor scooter with rust and dirt, parked on grass and dirt, with a brick wall, blue tarp, parked cars, and trees in the background.
Close-up of an old, yellow Passola moped with rust on parts of the frame and suspension, parked on grass near a stone wall, with forest in the background.
Close-up of a motorcycle engine and frame with a person's hand working on it, on a rusty metal surface.
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Close-up of a mechanic's gloved hand working on a rusty metal gear component, possibly in an engine or machinery repair setting.
Close-up of an old, rusty motorcycle with a black tire, visible frame, and worn white engine case. The motorcycle appears to be on a gravel surface.
Close-up of a rusty, dirty small engine with multiple cooling fins, mounted on a weathered metal surface outdoors with a brick building and other objects in the background.
Close-up of a disassembled chainsaw engine part with a spring and metal components, outdoors with trees, a brick house, and a wooden deck in the background.
Close-up of the internal parts of a motorcycle engine, showing rusted gears, chains, and metal components with dirt and oil.
Close-up photo of a rusty, oil- and grime-covered mechanical part, possibly an engine component, with a background of grass and dirt.
Close-up of an exposed motorcycle engine part with oil and grime, showing springs, bolts, and metal components.
Close-up of a dirty, rusty chains and gears on a mechanical part, possibly an engine or machine component.
Close-up of a rusty mechanical gear and chain system, part of a machine or engine.
Close-up of a worn piston inside a dirty and rusted engine cylinder, with connecting rods and engine components visible.
Close-up view of internal components of a mechanical device with gears and metal parts, possibly part of an engine or machinery.
Close-up view of a motorcycle's front section, showing part of the white frame, a gold-colored cap, and nearby wiring, with tools and storage containers in the blurred background.
A disassembled engine gear case with gears and oil residue, showing the internal components of an engine.
Close-up of a metallic mechanical component with worn edges, placed on a green cutting mat with grid lines, and a thin green tool in the background.
Close-up of mechanical parts including a blue cylinder, metal nuts, bolts, and rods, likely part of machinery or an engine component, with a blurred workshop background.
Close-up of a disassembled engine cylinder head with visible valve stems, set on a workbench with tools and parts in the background.
A metal engine cylinder with cooling fins and bolt holes resting on a white textured surface, with a blurred background of tools and parts.
Close-up of a small engine or mechanical component, with visible spark plug and cooling fins.
Close-up of the interior of a piece of industrial or mechanical equipment showing several screws and a comb-like structure inside.
Close-up of a motorcycle rear wheel and exhaust system, showing a tire with the brand 'Dunlop' and model 'Street Response', and part of the metal chassis and suspension.
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