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2020 Honda CRF450RX
2020 Honda CRF450RX

Specs

General Information

Manufacturer
Honda
Honda
Model Year
2020
2020
Model
CRF450RX
CRF450RX
Model Code
CRF450RX
CRF450RX
Color
Red
Red

Brakes/Wheels/Tires

Brakes

Front - Single 260 mm disc with twin-piston caliper

Rear - Single 240 mm disc

Front - Single 260 mm disc with twin-piston caliper

Rear - Single 240 mm disc

Tires

Front - Dunlop Geomax AT81 90 / 90-21

Rear - Dunlop Geomax AT81 120 / 90-18

Front - Dunlop Geomax AT81 90 / 90-21

Rear - Dunlop Geomax AT81 120 / 90-18

Dimensions

Weight
Curb - 255 lb. (Includes all standard equipment, required fluids and full tank of fuel—ready to ride.)
Curb - 255 lb. (Includes all standard equipment, required fluids and full tank of fuel—ready to ride.)
Ground Clearance
12.9 in.
12.9 in.
Wheelbase
58.2 in.
58.2 in.
Seat Height
37.8 in.
37.8 in.

Drivetrain

Transmission
Close-ratio five-speed
Close-ratio five-speed
Final Drive
#520 Chain; 13T/50T
#520 Chain; 13T/50T

Engine

Engine
Single-cylinder four-stroke, Unicam four-valve; 38mm intake; 31mm exhaust
Single-cylinder four-stroke, Unicam four-valve; 38mm intake; 31mm exhaust
Cooling
Liquid
Liquid
Displacement
449 cc
449 cc
Bore x Stroke
96 x 62.1 mm
96 x 62.1 mm
Compressio Ratio
13.5:1
13.5:1
Fuel System
Programmed Fuel Injection (PGM-FI), 46mm downdraft throttle body
Programmed Fuel Injection (PGM-FI), 46mm downdraft throttle body
Ignition
DC-CDI
DC-CDI
Fuel Capacity
2.25 gal.
2.25 gal.

Operational

Front Suspension
49 mm leading-axle inverted telescopic Showa coil-spring fork with rebound and compression damping adjustability
49 mm leading-axle inverted telescopic Showa coil-spring fork with rebound and compression damping adjustability
Rear Suspension
Pro-Link Showa single shock with adjustable spring preload, rebound and compression damping adjustability
Pro-Link Showa single shock with adjustable spring preload, rebound and compression damping adjustability
Rake
27° 25 ft. (Caster Angle)
27° 25 ft. (Caster Angle)
Trail
4.6 in. (116 mm)
4.6 in. (116 mm)

Features

Comfort

  • RENTHAL "FATBAR": The aluminum Renthal Fatbar features a bend that’s even better than the legendary Honda “CR” bar. It’s the new standard of excellence—you’re gonna love it!
  • FLAT SEAT / TANK JUCTION: The CRF450RX features a flat seat/tank junction, including a titanium fuel tank. The superior ergonomics make it easier to move forward and back on the bike, increasing your control.
  • BLACK RIMS: They may not help you go faster, but the black DID DirtStar rims sure look good.
  • SIDESTAND: Real enduro bikes need a sidestand, and we’ve given the CRF450RX a great one. Tucked up high and out of the way, this forged alloy piece is just another example of how the CRF450RX gets it right.

Engineering

  • HONDA SELECTABLE TORQUE CONTROL (HSTC): Notice that new button on the handlebar by the clutch perch? New for 2020, the CRF450RX gets our Honda Selectable Torque Control (HSTC). You can choose from one of three settings to perfectly dial your bike in depending on how much traction is available.
  • ENGINE MODE SELECT BUTTON: This simple handlebar-mounted button lets you dial in engine power delivery character with a push of your thumb. Choose between Standard, Smooth and Aggressive, depending on track conditions.
  • LIGHTER OVERALL WEIGHT: On a racebike, less weight is always better. That’s why our engineers are such fanatics when it comes to trimming grams from the CRF450X. You’ll feel the benefits everywhere: in acceleration, in suspension action, and most of all at the end of the day.
  • HRC LAUNCH CONTROL: We’re talking about a special ECU program here: push the button to select the mode, hold the throttle open, release the clutch, and the CRF450RX will do the rest, launching you into the first turn with a big advantage. It turns your bike into a holeshot-seeking machine!
  • ELECTRIC START: Kickstarting? Maybe if you’re riding in the vintage class, but not here. By ditching the kickstarter entirely, our engineers can make the CRF450RX lighter. Electric starters and lithium-ion batteries are so light now and so good that putting them on a bike like this is a win/win combination. And winning is what a CRF450RX is all about.
  • NEW REAR BRAKE PADS: Brakes are for more than just stopping: they help you set up the bike in turns and jumps. This year we changed the pads on the 2020 CRF450RX so they’ll last longer and give you even more stopping power—a real win/win to help you win.
  • 260 MM FRONT BRAKE: The CRF450RX’s large front-brake disc measures a whopping 260mm. You get great brake feel and a pattern that cuts down on weight. Front and rear brake-disc guards are part of the package too.
  • HIGH-CAPACITY RESIN FUEL TANK: For longer enduro loops, the CRF450RX features a bigger fuel tank that holds a full 2.25 gallons.

Handling

  • SHOWA SPRING FORK: The 49mm Showa fork is specially tuned just for the CRF450RX, and features a conventional spring design that helps increase the CRF450RX’s front-suspension precision, handling and feel.
  • NEXT-GENERATION ALUMINUM FRAME: The CRF450RX’s Next-Gen twin spar aluminum frame positions the rear shock’s mounting point lower, opening up the airbox area and contributing to a lower center of gravity for more holeshots. The frame geometry also helps improve traction, feeling and steering precision.
  • SWINGARM: The CRF450RX’s swingarm uses a special fabrication technique that lets us fine-tune the flex to work with the chassis and give you better rear traction and cornering precision.
  • TWIN-MUFFLER EXHAUST SYSTEM: The CRF450RX’s dual exhaust system is light, compact, and positioned close and low in the frame to take weight off the rear end and bring more mass to the bike’s center for improved handling. It also allows for more air flow, and that equals added horsepower.

Performance

  • 449 CC UNICAM ENGINE: Honda’s Unicam cylinder heads combine the best of single- and double-overhead-cam designs. The configuration contributes to a compact engine that saves weight over a comparable dual-overhead-camshaft motor and also permits a narrow included valve angle. This flattens the combustion chamber to facilitate ignition flame propagation, allowing a high compression ratio. Since less space is taken up in the cylinder head, the camshaft sits lower in the head for a more compact engine and a lower center of gravity.
  • DOWNDRAFT FUEL INJECTION: The CRF450RX features a downdraft intake tract and FI body to help increase both power and fuel-metering precision. It’s part of the reason the CRF450RX offers such explosive power and massive torque, especially out of the starting line and in the critical first 100 feet of the race to the first turn.
  • TITANIUM INTAKE VALVES: Lightweight titanium intake valves cut down on reciprocating mass and permit the use of smaller valve springs, reducing overall engine height.
  • DOUBLE-SPRAY INJECTOR SETTINGS: The CRF450RX’s fuel-injection system sprays twice per intake cycle. That helps increase fuel atomization without adding the weight or complexity of a second injector. The better fuel atomization means more power in the midrange and on overrev—you’ll feel it the first time you race.
  • DUNLOP GEOMAX TIRES: The CRF450RX’s Dunlop Geomax tires are specially designed for enduro use. The AT81 tires are spec’d at 90/90-21 for the front and 120/90-18 for the rear. You read that right: the CRF450RX rolls on an 18-inch rear wheel.
  • CYLINDER HEAD LAYOUT: The CRF450RX uses our latest finger-follower rocker design. The Unicam cylinder head remains one of the most efficient in the off-road world, giving you the design and performance of a double-overhead-cam layout but the compactness of a single-overhead-cam design.
  • 13.5:1 COMPRESSION RATIO: The CRF450RX features a refined squish area that helps boost compression to an impressive 13.5:1. That means improved combustion efficiency for more power.
  • UPDATE "IN MOLD" GRAPHICS: With all the time you’ll be spending in victory circle, you need to look your best. The 2020 CRF450RX has you covered. Our redesigned “in mold” graphics look great, and stay looking good.
  • SKID PLATE: A factory skid plate is light and offers the engine and lower-frame protection that a racer demands.
  • RELOCATED BATTERY / BATTERY BOX: For 2020, we designed a new battery box for the CRF450RX that moves the battery 28mm lower. That helps lower the overall center of gravity, which is always a benefit for responsive handling.

Comfort

  • RENTHAL "FATBAR": The aluminum Renthal Fatbar features a bend that’s even better than the legendary Honda “CR” bar. It’s the new standard of excellence—you’re gonna love it!
  • FLAT SEAT / TANK JUCTION: The CRF450RX features a flat seat/tank junction, including a titanium fuel tank. The superior ergonomics make it easier to move forward and back on the bike, increasing your control.
  • BLACK RIMS: They may not help you go faster, but the black DID DirtStar rims sure look good.
  • SIDESTAND: Real enduro bikes need a sidestand, and we’ve given the CRF450RX a great one. Tucked up high and out of the way, this forged alloy piece is just another example of how the CRF450RX gets it right.

Engineering

  • HONDA SELECTABLE TORQUE CONTROL (HSTC): Notice that new button on the handlebar by the clutch perch? New for 2020, the CRF450RX gets our Honda Selectable Torque Control (HSTC). You can choose from one of three settings to perfectly dial your bike in depending on how much traction is available.
  • ENGINE MODE SELECT BUTTON: This simple handlebar-mounted button lets you dial in engine power delivery character with a push of your thumb. Choose between Standard, Smooth and Aggressive, depending on track conditions.
  • LIGHTER OVERALL WEIGHT: On a racebike, less weight is always better. That’s why our engineers are such fanatics when it comes to trimming grams from the CRF450X. You’ll feel the benefits everywhere: in acceleration, in suspension action, and most of all at the end of the day.
  • HRC LAUNCH CONTROL: We’re talking about a special ECU program here: push the button to select the mode, hold the throttle open, release the clutch, and the CRF450RX will do the rest, launching you into the first turn with a big advantage. It turns your bike into a holeshot-seeking machine!
  • ELECTRIC START: Kickstarting? Maybe if you’re riding in the vintage class, but not here. By ditching the kickstarter entirely, our engineers can make the CRF450RX lighter. Electric starters and lithium-ion batteries are so light now and so good that putting them on a bike like this is a win/win combination. And winning is what a CRF450RX is all about.
  • NEW REAR BRAKE PADS: Brakes are for more than just stopping: they help you set up the bike in turns and jumps. This year we changed the pads on the 2020 CRF450RX so they’ll last longer and give you even more stopping power—a real win/win to help you win.
  • 260 MM FRONT BRAKE: The CRF450RX’s large front-brake disc measures a whopping 260mm. You get great brake feel and a pattern that cuts down on weight. Front and rear brake-disc guards are part of the package too.
  • HIGH-CAPACITY RESIN FUEL TANK: For longer enduro loops, the CRF450RX features a bigger fuel tank that holds a full 2.25 gallons.

Handling

  • SHOWA SPRING FORK: The 49mm Showa fork is specially tuned just for the CRF450RX, and features a conventional spring design that helps increase the CRF450RX’s front-suspension precision, handling and feel.
  • NEXT-GENERATION ALUMINUM FRAME: The CRF450RX’s Next-Gen twin spar aluminum frame positions the rear shock’s mounting point lower, opening up the airbox area and contributing to a lower center of gravity for more holeshots. The frame geometry also helps improve traction, feeling and steering precision.
  • SWINGARM: The CRF450RX’s swingarm uses a special fabrication technique that lets us fine-tune the flex to work with the chassis and give you better rear traction and cornering precision.
  • TWIN-MUFFLER EXHAUST SYSTEM: The CRF450RX’s dual exhaust system is light, compact, and positioned close and low in the frame to take weight off the rear end and bring more mass to the bike’s center for improved handling. It also allows for more air flow, and that equals added horsepower.

Performance

  • 449 CC UNICAM ENGINE: Honda’s Unicam cylinder heads combine the best of single- and double-overhead-cam designs. The configuration contributes to a compact engine that saves weight over a comparable dual-overhead-camshaft motor and also permits a narrow included valve angle. This flattens the combustion chamber to facilitate ignition flame propagation, allowing a high compression ratio. Since less space is taken up in the cylinder head, the camshaft sits lower in the head for a more compact engine and a lower center of gravity.
  • DOWNDRAFT FUEL INJECTION: The CRF450RX features a downdraft intake tract and FI body to help increase both power and fuel-metering precision. It’s part of the reason the CRF450RX offers such explosive power and massive torque, especially out of the starting line and in the critical first 100 feet of the race to the first turn.
  • TITANIUM INTAKE VALVES: Lightweight titanium intake valves cut down on reciprocating mass and permit the use of smaller valve springs, reducing overall engine height.
  • DOUBLE-SPRAY INJECTOR SETTINGS: The CRF450RX’s fuel-injection system sprays twice per intake cycle. That helps increase fuel atomization without adding the weight or complexity of a second injector. The better fuel atomization means more power in the midrange and on overrev—you’ll feel it the first time you race.
  • DUNLOP GEOMAX TIRES: The CRF450RX’s Dunlop Geomax tires are specially designed for enduro use. The AT81 tires are spec’d at 90/90-21 for the front and 120/90-18 for the rear. You read that right: the CRF450RX rolls on an 18-inch rear wheel.
  • CYLINDER HEAD LAYOUT: The CRF450RX uses our latest finger-follower rocker design. The Unicam cylinder head remains one of the most efficient in the off-road world, giving you the design and performance of a double-overhead-cam layout but the compactness of a single-overhead-cam design.
  • 13.5:1 COMPRESSION RATIO: The CRF450RX features a refined squish area that helps boost compression to an impressive 13.5:1. That means improved combustion efficiency for more power.
  • UPDATE "IN MOLD" GRAPHICS: With all the time you’ll be spending in victory circle, you need to look your best. The 2020 CRF450RX has you covered. Our redesigned “in mold” graphics look great, and stay looking good.
  • SKID PLATE: A factory skid plate is light and offers the engine and lower-frame protection that a racer demands.
  • RELOCATED BATTERY / BATTERY BOX: For 2020, we designed a new battery box for the CRF450RX that moves the battery 28mm lower. That helps lower the overall center of gravity, which is always a benefit for responsive handling.