Larry Curik’s Nitrous-Fed Harley FXR Reborn: The Story Behind the Lone Star Outlaw Pro-Street Build

There are builders who follow trends, and then there’s Larry Curik—a man who has spent more than five decades in the motorcycle industry doing exactly what he wants, exactly how he sees it in his head.
In 2026, Lone Star Choppers celebrates 30 years in business. Curik founded the Texas-based shop in 1996 after years working as a shop foreman and lead builder, but his obsession with motorcycles started much earlier. At 11 years old, he watched the iconic motorcycle documentary On Any Sunday for the first time, and everything changed.
“That was it,” Curik has said. “I wanted to do everything in that movie.”
Not long after, he bought a basket-case dirt bike, rebuilt it himself, and rode eight miles to a Yamaha dealership for parts—ducking police through alleyways because he was too young to legally ride on the street. That hunger eventually evolved into a lifetime of racing, fabrication, and mechanical experimentation. Over the years, Curik’s résumé has included motocross, road racing, Baja competition, fabrication work, and high-level product development inside the motorcycle industry.
He’s built pro-street customs, nitrous-fed monsters, race bikes, and completely one-off machines. He’s blown engines apart on dynos in front of magazine editors and pushed Harley-Davidson drivetrains well beyond what most people considered possible. At one point, he produced more than 235 horsepower from a Softail before the bike literally broke its frame under the strain.
And through all of it, Curik has never cared much about trends—or internet approval.
That mindset defines his latest build: a modern interpretation of an early-’90s pro-street Harley-Davidson inspired by the era when FXRs were cheap, plentiful, and often wrecked hard enough to become donors for radical custom projects.
Back then, Curik regularly stuffed Harley drivetrains into aftermarket frames like Kenny Boy chassis to create long, low, aggressive street weapons powered by big-inch motors and nitrous oxide. He always wanted to build another one.
When he acquired a long-forgotten frame and later received an invitation to build for the FXR Tour, the project suddenly gained momentum. Predictably, social media critics immediately focused on the fact that the motorcycle lacked the traditional FXR triangle section. The comment sections lit up.
Curik ignored it.
Instead, respected builders and longtime industry veterans stepped in to defend the work. To Curik, that mattered far more than arguing online. The motorcycle only needed to satisfy one person: himself.
And it did.
The bike carries one of Curik’s signature traits—a dual-carburetor setup feeding equal-length intake runners without modifying the cylinder heads. The rear intake path proved especially difficult, requiring two bends that initially created severe harmonic vibration around 2,600 rpm. During the FXR Tour, the unsupported intake shook violently enough to slosh fuel and flood the rear cylinder. Combined with a failed aftermarket motor mount and rocker box interference, the problems eventually forced the bike into a trailer mid-tour.
Back home, Curik fabricated proper carb supports, corrected the mounting geometry, and eliminated the vibration issues.
Now, according to Curik, “it rips.”
Then there’s the nitrous system.
Curik has extensive history with bottle-fed Harley horsepower, regularly producing more than 220 horsepower on previous builds. This machine uses a manually activated 30-horsepower single-stage nitrous shot that comes alive north of 3,500 rpm.
“It’s violent,” he says with a grin.
That brutality is intentional.
The understated finish reflects another lesson Curik learned decades ago. In the early 1990s, he once lost a bike show to a mostly stock motorcycle wearing flashy paint while standing beside one of his fully hand-built customs. Frustrated, he responded by building his next three motorcycles in flat-black rattle-can paint as a statement: focus on the fabrication, not the cosmetics.
This latest build carries that same philosophy. The finish is restrained, allowing the craftsmanship to take center stage. Subtle orange pinstriping ties together the tank, fenders, and custom Saddlemen seat featuring diamond pleats and orange stitching based on Curik’s own sketches.
One of the most advanced pieces on the motorcycle may go unnoticed at first glance: the velocity stacks.
Working alongside Mike Olley of 9 Finger Fabrication, Curik designed bell-mouthed stacks with internal reverse cones positioned ahead of the venturi—too complicated for traditional casting or machining. The parts were first prototyped through 3D printing before being manufactured using Direct Metal Laser Sintering (DMLS), creating components stronger and more precise than conventional cast pieces.
It’s cutting-edge manufacturing fused with old-school hot-rod mentality.
A perfect reflection of Curik himself.
Perhaps the most revealing detail of the entire build is that Curik powder-coated the frame himself in a non-air-conditioned shop in triple-digit Texas heat. No shortcuts. No outsourced labor. Just patience, sweat, and confidence in his own ability.
“I try to do everything myself,” he says. “I trust me.”
That philosophy has carried him from an 11-year-old kid rebuilding dirt bikes to a veteran builder still chasing horsepower after three decades of running Lone Star Choppers.
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This motorcycle isn’t a nostalgia project. It isn’t built for social media validation or trend chasing.
It’s built from a lifetime of racing, breaking parts, solving problems, and refusing to compromise.
And when the nitrous hits at 3,500 rpm, it doesn’t ask for permission either. HB

Photos: Ben Nichols, @GetBentMoto





















