1981 Honda CBX1000 Cafe Racer: Lighter, Stronger, More Agile

Building a bike that matches both the look and the performance a rider wants can be a big challenge. The Honda CBX1000 started as a heavy machine, but needed changes to become the perfect fit for its new owner. By cutting off weight and upgrading key parts, the team took this classic six-cylinder Honda and made it lighter, stronger, and more fun to ride.

Many components were rebuilt or replaced, including the wheels, suspension, and riding position. The visual style moved toward a blend of modern and classic, with custom details on the tank and tail section. Each change aimed to boost how the bike works and feels, while also giving it a bold, fresh look on the road.

Key Takeaways

• Upgrades focused on boosting the bike’s power and handling
• Both performance and style were improved with custom parts
• Rider comfort and overall experience were top priorities

Performance Modifications for the CBX1000

Shedding Unnecessary Weight

The team managed to bring the CBX1000’s weight down from 277 kg to 228 kg—almost 50 kg lighter than stock. This drastic reduction made the bike more agile and allowed the engine to deliver power more directly. Stripping away unused parts helped both performance and handling.

Weight Comparison Table

Upgraded Rear Arm and Wheels

To fit a wider rear tire and give the bike a sporty look, a new swing arm from Aprilia was installed. The build now uses custom Jonich wheels—17-inch rims on both front and back, with a 120 mm tire in the front and a massive 180 mm tire at the rear.

• Front wheel: 17″ x 120 mm
• Rear wheel: 17″ x 180 mm
• Wider tires now let the CBX1000 run modern sport bike rubber.

Enhanced Front Suspension

The front suspension uses a completely rebuilt 2013 Hayabusa front end. This upgrade delivers better handling and supports the demands of a heavier rider. Custom triple clamps and a new arrangement for gauges and handlebars make sure everything fits well and looks tidy.

Key changes:

• 2013 Hayabusa forks, rebuilt to match the bike
• Custom triple clamps for a perfect fit
• Modern gauges and controls

Custom Rear Shock Mount and Linkage

A special rear suspension linkage was fabricated to work with the new swing arm. The rear shock uses an Ohlins TTX unit, mounted through a custom system that is both strong and sleek. The subframe and seat area were rebuilt for a tight finish, with the shock mount hidden within the frame for a neat look.

Highlights:

• Ohlins TTX rear shock absorber
• Custom linkage and mounting points
• Strong bracing and a clean, seamless frame design

Upgrades to Engine Performance

Full Engine Rework and Detailed Check

The Honda CBX1000’s six-cylinder engine was taken apart at the top end for a thorough check-up. Every component was inspected to make sure it was running in top condition. This careful rebuild supports strong power output and lasting reliability for the heavier and more demanding use.

• Top end disassembly
• Comprehensive inspection for wear
• Ensuring durability and smooth operation

High-Performance Carburetors and Fine Adjustment

A new set of CR carburetors was added—one for each of the six cylinders. These carburetors allow for better fuel and air mixing, which helps the bike make more power. The carbs were precisely tuned to work with the rebuilt engine and custom exhaust system.

One-Off 3-Into-1 Exhaust Setup

The exhaust was specially designed, with three headers joining into one pipe on each side, then exiting through three mufflers per side. This design helps the motor breathe out exhaust gases more efficiently and gives the Honda CBX1000 a unique sound. The upgraded system works with the new carbs and engine updates to deliver a strong 100 horsepower.

• Custom-fabricated for performance
• Distinctive six-cylinder roar
• Works together with intake upgrades for maximum output

Frame and Handling Features

Seat Mount and Subframe Adjustments

The rear frame was rebuilt to make the back end lighter and sleeker. The new subframe creates a hard finish with a subtle ducktail, letting the Rails end flat at the rear instead of curving around. This design hides the bracing and gives a stronger, cleaner look. The seat padding was reshaped to fit this new style, making it both comfortable and visually appealing.

Key points:

• Stronger hidden bracing
• Flat, finished rails at the tail
• Redesigned seat for comfort and style

Rider Foot Controls and Ergonomics

Foot pegs were moved back and lowered to better fit taller riders. This adjustment provides a more relaxed and sporty feel, without making the position too cramped. These changes help get a better angle while cornering, but still keep things comfortable for longer rides.

Ergonomics Table:

Daytona-Style Rear Section

The tail of the bike was shaped to echo the look of the Shelby Daytona car with a custom fiberglass piece. The lines were matched to flow smoothly from the tank back to the tail, then sharply cut off for a classic racing style. With the tank smoothed out and a cleanly recessed cap, the whole rear section looks tidy and purposeful.

Highlights:

• Custom fiberglass tail with racing-inspired lines
• Smooth transition from tank to tail
• Recessed fuel filler for a clean finish

Styling and Visual Design

Mixing Modern Edge with Classic Shapes

The design takes inspiration from both streetfighter trends and timeless looks. This bike blends an aggressive style upfront—like exposed parts and modern angles—with familiar café racer lines. The new subframe and tail section follow the curves of the original tank but end with a sharper, cut-off style. The seat and fiberglass tail are shaped to echo classic sports cars, while the slimmer profile gives a lighter and more active feel.

Front End Features and Dashboard

The front setup uses a set of custom triple clamps and a pair of simple, easy-to-read gauges for speed and RPM. ProTaper handlebars sit in a mid-rise position for comfort and control. The controls include high-quality ISR levers and three-button switches that keep the look clean and uncluttered. By removing the bulky original fairing, more attention goes to the unique engine shape and gives the bike a stripped-down, sporty appearance.

Extra Lighting and Custom Mounts

Auxiliary lights sit on both sides of the tank. These work with a bright seven-inch headlight that uses a halo ring for a cool modern effect. The mounting brackets are custom-made from scratch, making sure all lights fit securely and point in the right direction. This lighting not only improves visibility but also adds a tough, aggressive look to match the bike’s updated style.

Handmade Front Fender and Mount Kit

At the front, a 24-spoke specialty wheel is wrapped with a handmade aluminum fender. The fender is attached with a do-it-yourself mounting kit, forming three solid mounts on each side.
A table below explains the components:

This setup finishes off the bike’s modern front look while keeping everything strong and well-supported.

Making Changes to the Fuel Tank

Removing Rust and Patching Damage

The Honda tank had a thin spot at the back where debris usually collects. Over time, this led to several rust holes that needed fixing. All damaged parts were carefully patched to restore the tank’s strength and stop future leaks.

Smoothing the Metal Surface

The original seat followed over a part of the tank that was not smooth. Sheet metal work was done to flatten and even out this area. This gave the new seat a level and tidy surface to match its thinner shape, creating a clean line from the seat onto the tank.

Installing a Sunken Fuel Cap

The tank used to have a large filler cap that stuck out. That section was cut out, and a recessed filler cap was installed. Now the top of the tank has a smoother finish, which helps with the bike’s streamlined look.

Sound and Riding Experience

Riders notice this Honda CBX1000’s six-cylinder engine right away. The custom three-into-one-into-three muffler system brings out a strong and clear exhaust note. It makes a deep roar, especially when the bike moves into higher revs. Many say this sound is what makes the Honda CBX1000 stand out on the road.

The bike feels much lighter now, coming in at 228kg compared to the original 277kg. Thanks to the weight drop and upgrades like the Ohlins rear shock and the Hayabusa front end, the ride is more agile and responsive.

A few highlights of the experience:

• Sound: Unique, powerful six-cylinder exhaust, especially satisfying for riders who love engine noise.
• Comfort: Foot pegs are moved back and lower, suiting taller riders but still keeping a sporty feel.
• Handling: Wider rear tire and modern suspension let the bike corner better and run at higher speeds safely.
• Seating: The thinner seat, custom subframe, and re-shaped tank offer a cleaner look and a riding position that feels balanced.

This combination of sound, comfort, and control gives the Honda CBX1000 a distinct, enjoyable riding experience.

Wrapping Up and Next Steps

Take a look at the results achieved in this Honda CBX1000 café racer project:

Want to give your bike a similar transformation?

• Visit the store online
• Browse purpose-built parts and gear
• Support the community by sharing your outcome

Whether building, restoring, or just upgrading your ride, get the right parts and start your own project.

Thanks for joining the ride.