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BSA A65 Lightning: Malarkey Engineering turns British nostalgia into pure mechanical menace.

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Forget polite restorations, museum-piece classics, and motorcycles built merely to look pretty under showroom lights. Malarkey Engineering’s BSA A65 Lightning is an unapologetic act of mechanical rebellion, dragging a legendary British parallel twin out of the past and rebuilding it into something far more sinister. Created for Bill Gysin, this savage reinterpretation takes the soul of the original BSA Lightning and wraps it in an exquisite, purpose-built bronze-welded chromoly steel frame inspired by the iconic Métisse Mk3. The result is a motorcycle that looks like it escaped from a golden era of British racing, only to return with unfinished business. A modified five-gallon Gold Star aluminium fuel tank dominates the muscular silhouette, while handcrafted alloy bodywork, a custom oil tank, 1968 Lightning-inspired side panels, and a Spitfire-inspired leather-and-suede saddle deliver an intoxicating mix of old-school aggression and bespoke craftsmanship. There is no unnecessary decoration, no pointless nostalgia, and absolutely no attempt to play it safe. This is British engineering with its sleeves rolled up and its knuckles firmly clenched.

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And then there’s the engine. What began life as BSA’s legendary A65 parallel twin has been transformed into a thoroughly reworked 750cc mechanical weapon, built with the kind of obsessive attention usually reserved for serious racing machinery. A dynamically balanced, lightened 270-degree crankshaft, Carrillo connecting rods, Megacycle camshaft, Moore Speed steel cam gears, and a Richard Peckett gas-flowed cylinder head turn this vintage powerplant into something considerably more intimidating than its original creators ever imagined. With 10.5:1 compression, twin 34mm Amal Concentric MkII carburettors, Pazon electronic ignition, and a custom ceramic-coated exhaust system, the Lightning has the hardware to back up its ferocious appearance. A Bob Newby belt-drive racing clutch and close-ratio BSA gearbox complete the drivetrain transformation. But raw mechanical aggression is only half the story. Up front, 43mm Triumph Thunderbird forks conceal sophisticated Maxton cartridge internals, while a custom oval-section swingarm and twin Maxton rear shocks keep the chassis under control. Massive ISR six-piston front braking hardware clamps a 320mm floating disc, backed by a 210mm rear disc, while wide 18-inch Morad rims wrapped in Michelin Pilot Road III tyres give this vintage predator a thoroughly modern stance. It may wear the face of a classic, but underneath, this thing means business.

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The finishing details are where Malarkey Engineering delivers the final knockout. Motogadget Motoscope instrumentation, an M-Unit electrical system, keyless ignition, ISR switchgear, discreet wiring, and LED lighting bring modern technology into a machine that still looks gloriously analogue. Every weld, bracket, polished surface, and carefully routed component reinforces the same message: nothing here happened by accident. At just 150kg dry, with a razor-compact 1,370mm wheelbase, 24.5-degree steering rake, and 90mm of trail, the Lightning promises the kind of sharp, engaging character that makes heavyweight modern machinery seem unnecessarily complicated. This isn't some vintage motorcycle dressed up for social media, nor is it a soulless modern special hiding behind retro styling. It is a brutally focused, hand-built expression of British motorcycling at its most defiant, where old-world craftsmanship collides with modern performance engineering. Malarkey hasn't simply brought the BSA A65 Lightning back to life. It has given a British legend a second chance to raise hell.