2023 Suzuki RM-Z450

The 2023 RM-Z450 remains the champion's choice, as its sleek, race-ready appearance, strong engine, and nimble chassis continue the Suzuki tradition of extraordinarily precise handling.

 

 

 

 

The RM-Z450 epitomizes Suzuki's “Winning Balance" philosophy of "RUN, TURN, and STOP" with strong brakes for controlled stopping power, a wide spread of engine muscle with high peak power, and a strong, light, and more nimble chassis that remains the class standard for cornering performance.

 

 

 

 

Tuning the electronic fuel injection and ignition systems for maximum performance is easy thanks to Suzuki's smartphone-based MX-Tuner and proven fuel-coupler system that is included with each 2023 RM-Z450.

 

 

 

 

Competition motorcycles like the RM-Z450 can only be ridden on non-public land in California per California Air Resource Board (CARB) regulations.

 

 

Key Features

 

Strong, Usable Engine Performance* Great throttle response delivers high peak power.* Evolved traction management system helps the bike hook up.* Suzuki Holeshot Assist Control (S-HAC) gets you out front.

 

Unmatched Cornering Performance* Frame and swingarm balance lightness with strength.* Chassis dimensions blend nimble handling with stability.* Coil spring fork provides great performance and easy tuning.* Showa BFRC (Balance Free Rear Cushion) shock settings delivers remarkable and controlled damping response.* Bridgestone X30 tires bring outstanding grip.

 

Controlled Braking Performance* Large 270mm front brake rotor increases stopping power and feel.* Compact rear master cylinder is designed to prevent mud from collecting on it and from catching on the rider's boots.

 

Functional Styling* Aggressive styling blends function with Suzuki character.* Narrow cockpit lets rider move with ease for maximum racing performance.

 

Rider-friendly Tuning* Suzuki's MX-Tuner 2.0 is supplied, providing quick fuel injection and ignition tuning through an easy-to-use smart-phone application.* Fuel couplers are included for quick and easy EFI Tuning.

 

Engine Features

 

The 449cc, liquid-cooled, four-stroke, four-valve, DOHC engine is the latest incarnation of Suzuki's proven and reliable fuel-injected powerplant.

 

The engine has high peak horsepower with strong torque at lower engine speeds for excellent throttle response through the entire rev range.

 

The cylinder head intake port shape creates a high amount of tumble flow to the incoming fuel/air to increase power output.

 

The air cleaner's large and straight opening creates a more direct air path to the throttle body to increase performance.

 

Suzuki's advanced fuel-injection system creates extra-smooth power delivery, high fuel efficiency, and superb reliability.

 

The RM-Z450's throttle body design locates the fuel injector, fed by a high-pressure fuel pump, so it sprays fuel directly at the butterfly valve to improve atomization of the fuel/air charge.

 

This throttle body design eliminates complex control linkage, so the rider feels a more direct connection to the engine.

 

The intake camshaft profile has more valve lift than the prior generation RM-Z450, increasing power at all engine speeds.

 

The compact aluminum cylinder is finished with Suzuki Composite Electrochemical Material (SCEM) coating for durability, light weight, and efficient heat transfer.

 

The piston's casting includes strengthening ribs near the wrist pin bosses to match component reliability to the engine's high horsepower.

 

Engine starting is simple and efficient due to a long kick-start lever, well-matched internal gear ratios, a large air cleaner and breather system, plus an automatic decompression system that works precisely and efficiently (eliminating the need for a heavy and costly electric start system).

 

The high-flow exhaust system complies with AMA sound regulations.

 

Tough resin engine protectors help guard the coolant pump (on the right) and the stator cover (on the left) from debris and stones.

 

Advanced Electronics Feature

 

Included with the 2023 RM-Z450 is Suzuki's MX-Tuner 2.0 that provides the ability to easily adjust the fuel injection and ignition system settings for optional race performance.* Using a smartphone application that wirelessly connects to the MX-Tuner's compact transceiver, fuel delivery and ignition timing can be quickly changed.* The MX-Tuner application can pre-program personalized settings into the ECM that can be activated by plugging in one of the supplied fuel couplers.* Racers and tuners can easily change settings to match performance-related updates.* The application can save a number of settings for different tracks or weather conditions, plus settings can be exchanged with other racers.* Real-time engine data and run-time information are accessible to help you stay on top of bike maintenance.

 

Suzuki's proven, easy-to-use fuel couplers are also included to simplify EFI tuning.* For quick fuel adjustments to suit riding conditions, two couplers are provided. One is for a richer-than-stock and another for a leaner-than-stock fuel setting.* Riders can change fuel settings in seconds by simply connecting either coupler to the wire harness.

 

The RM-Z450 features an evolved and efficient traction management system. The Electronic Control Module (ECM) continually measures throttle opening, engine speed, and gear position and then adjusts the ignition timing and fuel injector duration to fine-tune the engine output to deliver the best traction for the riding conditions.* The RM-Z450's traction management system is different from a street bike traction control system, as it does not measure rear tire spin. Because the needs of a motocrosser are different than a street bike, this system offers constant adjustment that maximizes traction at all times.

 

The Suzuki Holeshot Assist Control (S-HAC) is a selectable launch system derived from the factory race bike to help the rider's takeoff from the starting gate for an early lead. There are three launch modes riders can choose for the best option per their skill level and starting conditions. There are also three stages to Mode A and Mode B of the S-HAC system. This helps riders at the moment of launch, when crossing the gate, and through acceleration to the full speed. The S-HAC settings for Mode A on the RM-Z450 are specially tuned to aid the rider's throttle control during launches. Mode A: For hard surfaces or slippery conditions at the starting gate. Mode B: When conditions at the starting gate have better traction, and a more aggressive launch is desired. Base Mode: Standard power launch, no action required on the S-HAC switch.

 

Designed for motocross use, the lightweight, battery-less, electronic fuel injection system is key to the engine's efficient power delivery.

 

Transmission Features

 

The well-sorted, five-speed transmission enables precise gear shift operation. This precise transmission feel is the result of an accurately machined shift cam for exact gear selection. Specialized machining processes also increase the precision of the matching gears.

 

The multi-plate, wet-clutch uses a rack-and-pinion clutch release mechanism for precise feel of the engagement and disengagement points while riding.

 

The lightweight chain guide is shaped to accurately route the drive chain smoothly.

 

Chassis Features

 

The RM-Z450's twin-spar frame and twin-beam swingarm design continues Suzuki's tradition of delivering the best-handling motocross machines available.

 

This aluminum alloy, twin-spar frame combines cast and extruded sections to achieve superior front-and-rear weight distribution while balancing strength and weight.

 

The frame is 700 grams (1.32 pounds) lighter than the prior generation RM-Z450 to improve cornering performance and shock absorption while delivering stable handling.

 

The swingarm is assembled with thin, yet strong, materials for improved cornering performance and stable handling.

 

The short wheelbase and frame head pipe location produces quick and nimble handling characteristics.

 

Hexagonal aluminum rails are used on the sub-frame for light weight, a slimmer appearance, and easier air filter service.

 

The sub-frame rails route inward to slim the bodywork, but also route upwards to provide additional space for the large air cleaner and the advanced BFRC shock absorber.

 

Like the trim sub-frame, all of the bodywork is slim to enable the RM-Z450 rider to move freely in the cockpit, especially during spirited riding.

 

Inspired by the advanced suspension from the GSX-R1000R Superbike, the RM-Z450 is fitted with a Showa BFRC shock absorber.

 

The BFRC uses a separate, external damping circuit that improves the responsiveness of damping force to deliver excellent traction and better absorption over bumps.

 

The fully adjustable BFRC controls damping so well during minute suspension movements that ride comfort is increased at lower speeds, while handling is enhanced at higher speeds.

 

The Showa coil spring front fork has large inner tubes and rod pipes for strength and durability.

 

Springs in each fork leg combine with large, adjustable damping cylinders to deliver better response to the terrain and provide a strong feeling of control to the rider.

 

Front suspension tuning and maintenance is balanced and easy: a great benefit during frequent riding.

 

The strong Renthal aluminum tapered handlebar has a straighter bend than prior models to help aid the rider during aggressive maneuvering.

 

The light upper fork bracket was developed to complement the Showa coil spring front suspension and handlebars.

 

For effective stopping performance and feel, a large 270mm, wave-style front brake rotor with a twin piston caliper are used.

 

The trim rear brake master cylinder hugs the frame beam to reduce dirt contamination and the chance of the rider's boot touching it during riding.

 

To support the strong engine, braking, and handling performance of the RM-Z450, the bike is fitted with racetrack-developed Bridgestone Battlecross X30 tires.

 

The wheels feature black anodized rims with a cross-section design that maintains strength while reducing un-sprung weight.

 

Suzuki beak-inspired styling has a sharper front fender and radiator shrouds blending into side covers and an upswept tail, to promote the impression of speed while reducing weight and easing service.

 

The functional styling and the motorcycle's trim chassis permit a variety of rider positions that facilitate control and comfort.

 

The plastic fuel tank weighs a half-pound less than the prior generation's aluminum tank. Fuel capacity is an ample 1.7 US gallons.

 

The seat base, inner fenders, and side covers were developed to reduce the amount of moisture and dirt that gets to the air cleaner. This helps prevent debris from contaminating the air filter element.

 

Made with a special density foam, the seat is well shaped and slim to aid the rider's control of the motorcycle. The seat has a large blue gripper panel that runs nose-to-tail on the cover.

 

The Champion Yellow bodywork is enhanced with a graphics package that features distinctive striping and Suzuki logos.

 

See Suzuki's industry-leading contingency programs at SuzukiCycles.com/Racing.

 

Additional Features

 

Competition motorcycles like the RM-Z450 can only be ridden on non-public land in California per California Air Resource Board (CARB) regulations.

 

Engine

 

Engine: 449cc, 4-stroke, liquid-cooled, single cylinder, DOHC

 

Bore x Stroke: 96.0 mm x 62.1 mm (3.78 in. x 2.40 in.)

 

Compression Ratio: 12.5:1

 

Fuel System: Fuel injection, 44mm throttle body

 

Starter: Primary kickstarter with automatic decompressor

 

Lubrication: Semi-dry sump

 

Drivetrain

 

Clutch: Wet multi-plate

 

Transmission: 5-speed constant mesh

 

Final Drive: Chain, DID 520DMA2K, 114 links

 

Chassis

 

Suspension Front: Inverted telescopic, coil spring, oil damped, adjustable damping force

 

Suspension Rear: BFRC-link type, coil spring, oil damped, adjustable spring preload and damping force

 

Brakes Front: Disc brake, single rotor

 

Brakes Rear: Disc brake, single rotor

 

Tires Front: 80/100-21 M/C (51M), tube type

 

Tires Rear: 110/90-19 M/C (62M), tube type

 

Fuel Tank Capacity: 6.3 L (1.7 US gal.)

 

Color: Champion Yellow No. 2

 

Electrical

 

Ignition: Electronic ignition (CDI)

 

Spark Plug: NGK DIMR8C10

 

Dimensions

 

Overall Length: 2175 mm (85.6 in.)

 

Overall Width: 835 mm (32.9 in.)

 

Overall Height: 1260 mm (49.6 in.)

 

Wheelbase: 1480 mm (58.3 in.)

 

Ground Clearance: 330 mm (13.0 in.)

 

Seat Height: 960 mm (37.8 in.)

 

Curb Weight: 112 kg (247 lb.)

 

Warranty

 

Warranty: Not applicable

 

NOTES:

 

For your safety, always wear a helmet, eye protection, and protective clothing when riding any motorcycle or ATV. Never ride under the influence of alcohol or other drugs. Study your owner's manual and always inspect your Suzuki before riding. Take a riding skills course. For the MSF street course nearest you, call 1-800-446-9227. Off-road riders can enroll in the DirtBike SchoolSM by calling 1-877-288-7093. ATV riders can call the SVIA at 1-800-852-5344 and we'll even pay for the training. Suzuki engineered the GSX-Rs, Hayabusa, and the QuadSport Z400 for experienced riders. Specifications, appearances, equipment, color, features, materials and other items of “SUZUKI" products shown are subject to change by manufacturer at any time without notice. Suzuki, the “S" logo, and Suzuki model and product names are Suzuki Trademarks or . 2022 Suzuki Motor USA, LLC. Engine Type: 4-stroke, single cylinder, DOHC
Displacement: 449cc
Bore and Stroke: 3.78 in. x 2.40 in. (96.0 mm x 62.1 mm)
Cooling: Liquid
Compression Ratio: 12.5:1
Fuel System: Fuel injection, 44mm throttle body
Ignition: Electronic ignition (CDI)
Front Suspension: Inverted telescopic, coil spring, oil damped, adjustable damping force
Front Brakes: Disc brake, single rotor
Front Tire: 80/100-21 M/C (51M), tube type
Rear Suspension: BFRC-link type, coil spring, oil damped, adjustable spring preload and damping force
Rear Brakes: Disc brake, single rotor
Rear Tire: 110/90-19 M/C (62M), tube type
Dry Weight: Curb Weight: 247 lb. (112 kg)
Fuel Capacity: 1.7 US gal. (6.3 L)
Wheelbase: 58.3 in. (1480 mm)
Ground Clearance: 13.0 in. (330 mm)
Seat Height: 37.8 in. (960 mm)
Transmission: 5-speed constant mesh
Final Drive: Chain, DID 520DMA2K, 114 links
Colors: Champion Yellow No. 2