source: Buell
Introducing the new power-to-weight class leader, the Buell 1125CR. A fearsome blend of superbike performance, sinister styling and wicked attitude, it pushes the boundaries of the naked category.
This 21st century, café racer combines a featherweight chassis with a dominating 1125cc liquid-cooled, V-Twin for powerful acceleration in any gear.
Add to that its aggressive, sport riding position and precise handling and you’ve got an experience like no other.
- Buell Intuitive Response Chassis (IRC)
The Intuitive Response Chassis (IRC) is the stiffest we’ve ever built, resulting in a bike that’s better able to hold a line with minimal flexing or bending. Constructed of lightweight aluminum, it responds to aggressive riding with precision and predictability, delivering an unprecedented amount of rider feedback, regardless of road conditions.
Frame and swing arm A new longer cast-aluminum swing arm design optimizes the suspension geometry with the lower final drive gearing. Its pivot shaft is carried in the engine cases to create a stiff connection between the rear wheel and the rest of the chassis. Slider bobbin added to the swingarm for protection and use of a rear stand.
- Fuel Capacity
With 5.3 gallons of fuel contained in the frame, as near to the center of mass as possible, the rider is able to spend more time on the road enjoying the 1125CR’s precision handling and less time at the fuel pump.
Front brake Buell Zero Torsional Load (ZTL²) front brake utilizes a four-pad, eight-piston caliper inspired by the XBRR race motorcycle. A single 375mm rotor mounts directly to the rim producing outstanding stopping power. The caliper casting was optimized for torsional stiffness, yielding a more progressive and connected braking feel to the rider. The rim-mounted design eliminates the need for load-bearing spokes or even a second disc, resulting in a front end assembly that is significantly lighter than competitive designs.
- Front suspension
To match the stiffness of the main chassis, the 1125CR uses a fully adjustable 47 mm Showa® inverted fork, contributing to superior feel and greater feedback. Spring rates and damping are optimized for agility and responsiveness.
- Exhaust
Exhaust cans are heavy. It doesn’t make sense to hang them up high and off the back of the bike. Our underslung exhaust – a Buell staple since 1985 – concentrates the weight underneath the chassis to provide greater Mass Centralization. The result is a clean, uncluttered look, improved flickability and superior handling. The 1125CR exhaust system features a large-volume muffler tuned to produce a linear horsepower and torque curve.
- Rear suspension
The fully adjustable, piggyback-style Showa® monoshock lets you fine-tune the ride for your weight and riding style. Linklessly mounted to a pivot point placed forward on the engine case, it enhances rigidity while reducing squat during hard acceleration.
Tires Pirelli® Diablo Corsa III tires feature a three-zone compound for optimum street and track use.
- Rear Brake
The rear brakes utilize a two-piston caliper and a 240mm stainless steel rotor. The caliper is mounted directly to the inner surface of the swing arm, hidden from view. The caliper weighs 1.5 pound less than a typical carrier-equipped rear caliper system, reducing unsprung weight and complexity.
- Steel Braided Brake Lines
Both rear and front brakes are fitted with steel braided brake lines for a better correlation of lever pressure to brake pressure resulting in improved brake feel.
6 spoke Cast Aluminum Wheels With braking forces distributed through the entire rim due to the ZTL perimeter mounted brake rotor, the Buell 6-spoke front wheel can be made extremely light. This reduces steering inertia and unsprung weight for better handling on the less-than-perfect streets you’ll ride every day.
- Immediate Throttle Response Belt drive
A unique constant-tension pulley eliminates slack in the driveline, resulting in smoother on/off throttle transitions no matter what position the swingarm is in. Clean, quiet and extremely strong, the Veyance Hibrex belt with Flexten Plus technology never requires adjustments of any kind. In addition, it weighs just 1.06 pounds, compared to drive chains that weigh four to five pounds.
- 1125 Helicon Engine
A Buell exclusive, the powerful Buell Helicon® 1125cc, 72-degree, liquid-cooled, V-Twin engine. - 1125cc
Most powerful Buell street engine to date. By not compromising to conform with a race class spec, 1125cc’s gives this engine the right bore and stroke combination to deliver superbike power: 146 Hp. and 82 ft/lbs of torque, with a redline of 10,500 RPM. The broad powerband and seamless torque curve generates hard and fast acceleration from anywhere on the RPM range.
- 72 degree V-Twin
The look, sound, and feel of a V-Twin engine deliver the character and superior ride experience you expect on a Buell. The 72-degree V-angle creates a compact, efficiently packaged engine and allows additional weight to be distributed to the front of the bike. It also allows for inclusion of an optimum downdraft fuel intake system, thereby lowering the height of the center of gravity as well.
- 103.3 mm Bore & 67.5 mm Stroke low inertia flywheel
A big bore, short stroke and light flywheel deliver complete power and quick-revving performance.
- Finger-Follower Valve Lifters
The Buell Helicon motor's valves are actuated with finger followers and adjusted with shims. Derived from F-1 race technology, finger follower valve actuation reduces friction and permits a quicker valve opening due to reduced weight. Shim replacement is quick and easy due to the unique follower retention system.
- Closed loop fuel injection system, DDFI3 EFI 61mm dual throttle bodies
Immediate throttle response in any environment is delivered by the Helicon motor’s closed loop FI system. It provides constant feedback to the ECU based on environment and ensures an efficient mixture control system, resulting in smoother throttle operation and better fuel economy. The 61mm dual throttle bodies allow for superior air intake and optimum engine performance.
- Dual Overhead cams with self adjusting chain drive; 4 Valves
The single-cam-per-cylinder chain drive contributes to the engine’s compact design. The intake cam drive is driven by the chain while the exhaust cam is gear driven. It requires less space over the cylinder head than a three-sprocket design, reduces weight and allows the engine to be located in an optimum, forward position.
- Magnesium Valve Covers
Durable and lightweight, the magnesium valve covers are another example of how Buell is able to keep the overall weight of the motorcycle extremely low.
- Primary balancing with three internal shafts
The dry sump improves power by increasing efficiency, while the integrated oil reservoir at the lower left side of engine keeps the engine compact and fluids low, contributing to mass centralization.
- Twin Side-Mounted Radiator Cowlings
Twin radiators are mounted longitudinally within aerodynamic cowlings. The position of the radiator system allows the engine to be positioned forward in the chassis, creating a more optimal weight distribution from front to rear. In addition, the position of the cowlings captures free-flowing air, driving airflow into the cowlings (and away from the rider), directing the air for more efficient engine cooling.
- Dry Sump Oiling with integrated oil reservoir located in the lower crankcase
The dry sump improves power by increasing efficiency, while the integrated oil reservoir at the lower left side of engine keeps engine compact and fluids low, contributing to mass centralization.
- Compensated Front Sprocket
By placing the compensation function in the transmission output sprocket rather than the wheel sprocket, unsprung weight is reduced, helping to improve handling.
- Camshafts
The single-cam-per-cylinder chain-drive contributes to the engine’s compact design. The intake cam drive is driven by the chain while the exhaust cam is gear-driven. It requires less space over the cylinder head than a three-sprocket design, reduces weight and allows the engine to be located further forward.
- 6-Speed, close-ratio transmission
With lowered final-drive gearing for hard acceleration, the six-speed, close-ratio transmission provides the rider the right gear on any ride and any situation.
- Oblique stacked transmission configuration
The Helicon powertrain stacks the primary and secondary drives to yield a more compact overall design. This increases front weight distribution to aid in anti-squat and improve suspension response. It also allows Buell engineers to design a forward placement of swing arm pivot, providing room for a longer swing arm and better overall handling.
- Hydraulic Vacuum Assist (HVA) slipper -action clutch
The smooth clutch lever effort and slipper-like action mechanism reduces engine braking during hard deceleration and enhances the overall rider experience.
A 12 Liter Air box The large, 12-liter airbox is designed to optimize air intake and accommodate a large, easy-to-service air filter.
- Ram Air System
Using computational fluid dynamics to optimize the air flow, the RAM air system pressurizes the air box for a performance gain at speeds over 80 mph.
- Ergonomics / seating position
With relaxed footpegs and a short reach to the bars, the riding position is versatile, accommodating both an upright stance and an aggressive lean into the bike.
- Weight
At just 375 lbs. dry, the 1125CR is the lightest streetfighter in its class. It feels quick and nimble, effortlessly flicking, swerving and dodging around whatever the road throws your way.
Fairing
The sinister gaze of the 1125CR hints at what’s to come when the stoplight turns green. The minimalist flyscreen gives the pilot a full view of the urban course ahead. Radical headlamps are blended into the fairing, giving the bike a purposeful stare.
Footpegs
The footpeg placement keeps you in an aggressive riding stance to optimize your ability to quickly shift your weight around the bike while still allowing for a comfortable body position that reduces weight and pressure on your hands.
Instrument panel The instrument cluster with ODIS (On-Board Diagnostic Information System) is cradled in a lightweight, magnesium module. Compact and easy to read both day and night, the LED screen has a wide 50-degree viewing angle and features a service code display, security system with immobilizer, lap timer and splits, gear indicator, two trip odometers, ambient air temperature, and more.
- Tail Section
The rear section is clean and sleek with a passenger seat hidden under an easily removable cowling.
- Handle Bars
Clubman-style handlebars harken back to the days when café racers prowled the city streets. Aggressive, yet comfortable, they offer the rider superior control with a touch of style.
- LED Turn signals
Front turn signals are incorporated into the aerodynamic mirror housing making it easier for other drivers to see where you’re going.
- Adjustable levers
With rider comfort in mind, Buell features brake and clutch levers that are adjustable for reach. Foot controls (brake and shifter) feature toe pegs that adjust to rider foot size.
- Durability Features
The side-mounted radiators and outer covers are designed to absorb an impact and minimize repair costs.
- Convenience Features
Tie-down hooks on the tail section make it easy to secure extra gear.
