In the early days, factory-backed custom build-offs rarely got the benefit of the doubt in the wider custom world. Too often, they were seen as carefully managed marketing exercises, where creativity is encouraged right up until it becomes inconvenient. But Royal Enfield’s Busted Knuckles Build Off has more than shifted that perception; it’s literally a ‘No Rules’ throwdown where crazy is fully encouraged. Five Australian dealerships given six months to turn the Shotgun 650 into something far more individual than any showroom custom cruiser.
For decades, people around the world have been making their Royal Enfields truly their own, with all manner of customisation, from blinged-out Indian brass to down and dirty adventure machinery. The Shotgun 650, a platform already designed with customisation in mind, was therefore the perfect pick for this epic battle of Aussie builders. What followed was not a collection of safe showroom specials, but a genuinely diverse set of builds that each pushed in a different direction, from raw performance to full visual theatre.
MotoMAX Perth opened the conversation with Dirty Purdy, a stripped, aggressive interpretation of the Shotgun that leans hard into attitude. Lowered stance, raw finishes and a deliberately confrontational twin “shotgun” exhaust setup define the bike, with the pipes exiting high and wide at sharp angles like mechanical punctuation marks. It’s loud in every sense, a machine that doesn’t try to hide its intent for a second.
At the other end of the spectrum sits Moto Machine’s Desert Eagle, a build that feels like it’s been pulled from an alternate post-apocalyptic Dakar grid. With its fabricated steel tank, ram-air intake, nitrous system and rally-inspired stance, it pushes the Shotgun 650 into exaggerated territory without losing technical credibility. It’s part endurance racer, part science project, and fully committed to its own imagined world.
House of Motorcycles took a far more disciplined approach with Sawn-Off, stripping the Shotgun back into a compact, low-slung bobber with drag-bike undertones. The build is clean and purposeful, relying on proportion rather than excess. Low bars, long shocks and a carefully resolved tail section give it a tight, compressed stance, the kind of bike that looks ready to leave a black line before it leaves a conversation.
Fast Fuel’s Spitfire 650 brings a different kind of storytelling altogether, pulling inspiration from wartime aviation. It’s a bike built around detail and narrative, flame-thrower style exhaust effects, bomber-inspired finishes, ammunition case luggage and carefully layered visual references that tie back to the iconic aircraft. Unlike some of the more minimal builds in the competition, this one leans into character and expression, but still remains rideable and grounded in its Shotgun 650 origins.
By contrast, Grid Motorcycles’ entry takes a quieter route. On paper, the RE1000 shares the same foundation as the other four builds, but in execution, it feels almost entirely removed from them. Where others amplify the Shotgun’s identity, Grid builder Dylan Brown effectively reinterprets it from the ground up. The result is a machine that draws more from Japanese custom philosophy than conventional dealer build culture, with clear echoes of builders like Wedge and Heiwa in its restraint and proportion.
The custom chrome moly frame forms the backbone of the build, while hand-shaped aluminium bodywork keeps the visual language minimal and controlled. Every element feels reduced to its essential function, from the slim tank and fenders to the carefully integrated controls and stance. What makes the build even more significant is what sits at its centre. Working alongside Jesse Robinson, Grid has transformed the familiar Royal Enfield parallel twin into a genuine 1000cc monster motor! It’s a serious engineering leap that shifts the bike away from being just another custom Shotgun and into something closer to what you see on the floors of the Yokohama Hot Rod Custom Show.
That combination of mechanical ambition and visual restraint ultimately set the RE1000 apart. While the rest of the field explored aggression, narrative or spectacle in different ways, Grid Motorcycles delivered something controlled, deliberate and mature in its execution. And in the end, that balance proved decisive. When the dust settled on Royal Enfield’s Busted Knuckles Build Off Season III, it was Grid Motorcycles and their RE1000 that took the win, a bike that didn’t shout the loudest, but instead spoke with the most clarity. Five amazing machines, and one truly world-class winner.
[ Photos by Tom Fossati ]