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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Grind Hard Plumbing Co’s Monster Chopper is a one-off, oversized off-road motorcycle, and its first test ride was as much a shakedown as a joyride. In a video covered by New Atlas on May 14, 2024, the machine tears across dirt, splashes through mud, launches over jumps—and meets a fence at the builders’ property in Sandpoint, Idaho.
What is the Monster Chopper?
It is a custom-built motorcycle centered on a KTM 1190 Adventure V-twin, housed in a steel-tube trellis frame and fitted with hydraulic steering and exceptionally large off-road tires. New Atlas describes the build as weighing 814 lb (369 kg), a figure the builders reportedly obtained by weighing the bike in the video. These are article-reported details, not a set of independently verified specifications.
Why is it so unusual?
Its scale and weight
New Atlas identifies the tires as 46-inch Mickey Thompson Baja Claws. Combined with the reported 814-lb weight, they give the chopper a scale far removed from an ordinary motorcycle. The tire size is a detail of this particular custom build, not evidence that these tires are a practical or compatible upgrade for other motorcycles.
Its engine and gearing
The build uses a 1,190 cc KTM engine. New Atlas gives approximate output of around 150 hp and roughly 100 lb-ft (136 Nm) at the crank. The builders’ custom jack-shaft reduction changes the gearing; the article relays their estimate of around 3,000 lb-ft (4,067 Nm) after that reduction. That figure is the builders’ claim as reported by New Atlas, not an independently verified dyno result. The article notes that dyno figures would help establish the engine’s output.
#1 Best Overall
- Plastic model kit of a US chopper, with rubber tyres, 2 decals to choose from.
- Country of origin:- United States
- Good Quality
- Item Package Quantity: 1
Hydraulic steering and a custom chassis
The hydraulic steering and steel-tube trellis frame are part of a bespoke design built around the machine’s unusual proportions and off-road purpose. New Atlas also describes custom-fabricated or modified chain-related components; these are details of the build, not retail parts presented as ready-made upgrades.
What happened on the first test ride?
The ride was a working test on the builders’ property in Sandpoint, Idaho. The video, titled “Monster Chopper First Drive!”, shows the bike drifting across dirt, pushing through mud, and taking jumps. The run also includes a ride through a fence. The spectacle is part of a first shakedown, rather than evidence of a completed or fully validated motorcycle.
Rank #2
- Revell Model Kit #17325, Skill Level 5, Contains 153-Parts, Recommended for ages 13 and up
- Classic custom chopper trike styling. Over 14-inches long once assembled.
- Period-perfect details include stretched-out front forks and swept-back handle bars.
- Removable long-handled parade axe and optional iron mask. Includes soft vinyl tubing to represent spark plug leads and various control cables.
- Molded in white and clear with two trees of chrome-plated parts and soft black tires. Requires paint and glue. (not included)
Was the Monster Chopper finished?
No. In New Atlas’s May 2024 account, the team was still testing the bike and modifying parts, including chain-related components. Frame finish and paint were still future work at that point. The article therefore documents an evolving experimental build, not a final production specification or a motorcycle offered for sale.
Quick Recap
Best Value
- Descriptif produit: Maquette plastique à assembler
- Age minimum : 14 ans, Tam, scale: 1:12, length of model: 187 mm., Scale: 1:12, Length of model: 187 mm., Tamiya Yamaha Xv1000 Virago (1/12)
- scale: 1:12
- length of model: 187 mm.
- Scale: 1:12
Rank #4
- Unique Design of Motorcycle Building Set: Bring the thrill of the open road to your collection with motorcycle building blocks set. It features a striking orange body, oversized tires, detailed engine, front disc brake, exhaust, handlebars and realistic mechanical styling
- Low Ride, Bold Attitude: High handlebars and a low-slung body create a bold, rebellious stance. Motorcycle building block set embodies freedom and an unapologetic riding spirit, making it a striking motorcycle model for your display cabinet or desk
- Build for Motorbike Lovers: motorcycle brick set for adults teens and any motorcycle enthusiasts. Enjoy hands-on building that boosts focus, sparks creativity, and brings a satisfying sense of accomplishment
- Perfect Gift: Make birthdays, holidays, Christmas, or special occasions memorable with this motorcycle building set. More than a motorcycle building set, it’s an experience to build, enjoy, and display
- Easy Building & Support: Follow the detailed step-by-step instructions for a smooth and enjoyable building experience. If you ever find a missing or damaged piece, please let us know—we’re always ready to help make your build complete
Rank #3
- Two wheels don't just carry you forward. They remind you who you are. This Chopper motorcycle model captures that feeling—a tribute to the freedom that lives beyond the road.
- Electroplating painted parts reflect more than light. They reflect the soul of classic bikes. It’s the shine that belongs in every garage and every rider’s memory.
- The low frame and tall handlebars say one thing: this motorcycle has attitude. Every curve and angle was shaped for those who ride to stand apart, not blend in.
- Features a V-type engine with moving pistons. Turn the wheels and see the pistons move. In that motion, the spirit of the motorbike comes to life.
- It’s a gift that speaks without words. For those who hear engines like poetry and see chrome as a badge of belief, this is something worth holding onto.
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