RX 450F 4-Stroke

NO COMPROMISES. ONLY CHECKERED FLAGS.

0 cc
Engine Displacement
0 Speed
Transmission
36.0 in.
Seat height
300 lbs
Dry Weight

OVERVIEW

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More than just Bold New Graphics, the development of the RX 450F model focuses primarily on the electronics and engine power delivery for the 2027 model year. Traction Control has been further refined to be more precise and useable. The two maps have been updated to make the most of the engine, and all controls are managed via a new integrated control panel. Rider can choose Dry or Wet and loamy track conditions with a push of a button. Like the new RX 250F, the RX 450F has added launch control and quick shift, combined with the overall 450 engine package, this system will allow riders to perform at a higher level.

The electronic fuel injection system utilizes a 46mm tapered throttle body to deliver optimal air-fuel dispersion across the entire rev range, maximizing low-end throttle response while sustaining maximum power at high RPMs.". This new component comes straight from the AMA Supercross team as well as the MXGP team in Europe. It provides increased air speed and volume to the motor which enhances the low-to-midrange power overall while providing a quicker throttle response across the board.

With its sophisticated electronic controls, race-proven throttle body, and perfectly balanced power delivery, the 2027 RX 450F is designed to elevate your ride and help you achieve a higher level of performance on every track.

MODEL HIGHLIGHTS

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ELECTRONICS

LAUNCH
CONTROLS

Features 5 adjustable levels to manage torque delivery off the line. It maximizes traction immediately, preventing stalling or unwanted wheelies, perfect for occasional trips to the motocross track.

XPRO Mono
Tapered Throttle Body


EFI w/46 mm tapered throttle body and dual injectors

The dual-injector electronic fuel injection system utilizes a 46mm tapered throttle body to deliver optimal air-fuel dispersion across the entire rev range, maximizing low-end throttle response while sustaining maximum power at high RPMs

SHC Fork
QUICK SHIFT

QS
FAST SHIFT

Allows for lightning-fast upshifts without letting off the throttle or pulling the clutch, ensuring zero loss of momentum

SHC Fork
CHASSIS

PERFORMANCE SUSPENSION

The suspension system continues to rely on a KYB front fork and rear shock, already successfully used on the 450, but here fitted with a specific setup developed to suit the character and weight of the compact 250. Completing the chassis package is a carefully chosen set of wheels, with the rear wheel featuring a narrower profile than the other models in the range, with the aim of reducing rotating mass, increasing overall agility and minimising power loss during acceleration.

SHC Fork
ELECTRONICS

Redesigned Control Panel

Redesigned Control Panel: The control panel houses the new LC and QS buttons alongside the proven 2-level Traction Control (TC) and dual-map switch. It integrates cleanly into a redesigned handlebar pad.

SHC Fork

FEATURES

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ENGINE SPECIFICATION

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ENGINE TYPESingle cylinder, 4 –stroke, liquid cooled, 4-valve (Titanium intake and exhaust), electric start.
BORE97mm
STROKE60.8mm
DISPLACEMENT449.3cc
COMPRESSION RATIO13.5:1
VALVE TRAINDOHC finger followers / 4 valves
IGNITIONMitsuba
STARTERElectric Starter
ACGMitsuba
SPARK PLUGNGK LKAR 8A-9
LUBRICATIONTwin Oil Pumps w/Cartridge Filter & Separate Compartments For Engine & Transmission
FUEL SYSTEM Elldor electronic injection
ELECTRONICALLaunch Control, Traction Control, & Quick Shift
CLUTCHWet Diaphragm Style
TRANSMISSION5 Speed
FINAL DRIVENon-O-ring chain

CHASSIS SPECIFICATION

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FRAMEMolybdenum steel / Double Cradle w/ quick air filter access
WHEELBASE58.0"
SEAT HEIGHT37.2"
GROUND CLEARANCE13.2"
FOOTREST HEIGHT16.6"
DRY WEIGHT230.40 lbs
FUEL TANK CAPACITY1.85 US Gallons
FRONT SUSPENSION48 mm KYB AOS closed cartridge fork, adjustable compression & rebound
REAR SUSPENSIONKYB 50mm body with adjustable rebound and high/low speed on compression adjustment
FRONT WHEEL TRAVEL12"
REAR WHEEL TRAVEL11.8"
FRONT BRAKE260 mm floating rotor
REAR BRAKE240 mm rotor
FRONT/REAR RIM21" (Front) 19" (Rear)
FRONT/REAR TIREDunlop Geomax MX 34

DOWNLOADS

*Specifications subject to change without notice. Additional information on all models, including manuals, accessories, and parts books are available online at www.betausa.com under SUPPORT.

MSRP: $10,990.00

Destination fee $595.00

2027 450 RX 4T