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The HF355 is a one-off custom motorcycle built by Maxwell Hazan around a 3.5-liter Ferrari F355 V8—not a motorcycle designed or built by Ferrari. Its unusual packaging relies on the engine and transmission as structural elements rather than a conventional frame, with a structural fuel tank and bespoke drivetrain parts helping fit the car-derived engine into motorcycle proportions.
What is the HF355?
Hazan Motorworks’ HF355 pairs a 90-degree, five-valve-per-cylinder V8 from a Ferrari F355 with a custom motorcycle chassis layout. BikeBound’s November 2025 feature reported 375 hp and 268 lb-ft of torque. Those are published specifications, not independently verified dyno results. BikeBound’s HF355 feature also records Hazan’s description of his approach: “Every bike that I create is one of one, made by my own two hands here in my workshop Each bike is unique and never replicated. I push myself to make something new with every project and build the most interesting designs that I can think of in the most elegant way possible.”
How did Hazan fit a car V8 into a motorcycle?
The engine and transmission do structural work
Hazan told BikeBound that the stripped engine weighed 237 pounds, before adding parts such as the flywheel. Rather than build a conventional frame around it, he mounted components to the transmission and then to the engine; the fuel tank also serves as a structural subframe. Visordown’s later account describes the engine as a stressed chassis member. That arrangement saves the space and mass of a separate frame, but makes the engine, gearbox, mounts and custom interfaces central to the motorcycle’s structure.
Bespoke parts connect the engine to the rest of the bike
BikeBound reports custom intake manifolds, a custom flywheel and shafts between the engine and transmission. Visordown’s May 2026 report says early custom spline shafts failed during testing and had to be redesigned—a reminder that adapting a car engine is not simply a matter of bolting it into a motorcycle. The gearbox and transfer case were borrowed from a Motus V4, according to Visordown’s July 2025 build report.
#1 Best Overall
- 1/12 Honda CB750F Tunned No.66, Importado de Japón., Skala 1:12
- Długość modelu 183 mm, Maßstab 1:12
- Länge des Modells 183 mm
- Tamiya 300014066 Honda CB 750F Custom Tuned Motorradmodell Bausatz 1:12
- Inhalt: 1 Stück, La longitud es de 183 mm modelo
Cooling and packaging shaped the build
Hazan told BikeBound that the engine does not retain much heat, contrasting its original installation in a 3,500-pound car with the motorcycle’s exposed layout. He described a ducted radiator under the bike with four computer-controlled electric fans. That is the builder’s explanation, not an independent thermal test. Visordown’s July 2025 account also noted underslung radiators, a horizontally mounted Öhlins rear shock and bodywork shaped using polystyrene.
What parts and construction details are reported?
The build combines hand-shaped bodywork with high-end motorcycle components. BikeBound reported handmade carbon-fiber bodywork; Visordown’s May 2026 report specifies 16 individually made carbon panels, an AMP EFI MS3Pro engine-management setup, Öhlins FGR forks and TTX rear shock, Brembo GP4X calipers, and Marchesini wheels. These are reported details of this particular build, not a recommended parts list or a retail conversion package.
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)
Why do published power and weight figures differ?
Reports describe different stages of development and use different weight conditions. They should not be averaged or treated as results from a common test. No independent dyno sheet or measured top-speed result is established in the cited coverage.
| Report | Power | Weight or speed | Context |
|---|---|---|---|
| Autoblog, July 21, 2025 | Estimated 400 hp | Estimated 590 pounds with fluids and four gallons of fuel | An earlier development-stage account; the project had recently turned a wheel and was not yet finished. Autoblog’s report |
| BikeBound, November 10, 2025 | 375 hp | 550 pounds | BikeBound’s reported figure; the article does not specify the weight condition. BikeBound’s feature |
| Visordown, May 15, 2026 | Around 400 bhp | 585 pounds dry; claimed 187 mph | Later reported specification and claimed top speed, not an independently measured road-speed result. Visordown’s sale report |
The figures reflect distinct reports, dates and conditions—not a like-for-like comparison with production superbikes. In particular, a dry weight cannot be directly compared with a fueled weight, and the 550-pound figure should remain attributed to BikeBound rather than presented as a settled measurement.
Rank #3
- 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
How did the project develop, and what happened to the bike?
Autoblog reported in July 2025 that the project had been underway since early 2024 and had recently begun moving under its own wheels. Hazan described the challenge as keeping a V8-powered sport bike within familiar motorcycle proportions. Visordown’s July 25, 2025 report then described the bike as finished and running, while noting final output figures had not been disclosed at that point. By November 2025, BikeBound published the 375-hp and 550-pound figures; in May 2026, Visordown reported the one-off had sold for more than $500,000. That is a reported past sale, not a current listing or a general valuation.
Sources: BikeBound, November 10, 2025; Visordown, May 15, 2026; Visordown, July 25, 2025; Autoblog, July 21, 2025.
Quick Recap
Best Value
- True-to-scale detail
- Rubber tires & detailed exterior.
- Made of Die cast with some plastic parts
Rank #4
- Tamiya branded ready-to-assemble plastic precision static model kit. It is supplied unpainted and is ideal for model makers and painters!
- Required to complete: cement, paint and finishing supplies.
- This plastic model assembly kit depicts the Honda CB750F, a bike which showed immense popularity as soon as it was released. The model features a detailed depiction of the engine and its cooling fins, with vinyl tubing employed to recreate various lines and cables. Modellers will also be delighted to hear that the steering column features a metal screw for durability, while synthetic rubber tyres have realistic tread patterns. Decals are included for use with 3 different bodywork colours. Realistic rubber-like tyres with accurate tread pattern. Highly detailed DOHC 4-cylinder engine. Many plated parts included for added realism.
- Supplied in card box retail style packaging, it is an ideal model kit for the keen hobbyist to assemble and paint.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
