CRF450RM

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Description

How many corners are there on your favourite motocross or Supercross track? Each one of those leads directly from the starting gate to the winner’s circle—at least when you’re riding a redesigned 2021 Honda CRF450R.

  • New chassis.
  • Major engine overhaul.
  • New suspension.
  • New bodywork.

All with the goal of letting you rail through the corners with the most precision and power you’ve ever experienced. The engine’s power delivery starts off deep down for corner drive, and just keeps building until it’s at maximum roost.

Forget about clutch fade, adjustment, or hand fatigue with the new hydraulic system. Lighter than ever, the CRF450R explodes out of corners when it’s time to increase your lead. Arriving late 2020.

  • HRC launch control
  • Selectable engine maps
  • Honda Selectable torque Control (HSTC)
  • Electric start
  • Spring fork

PACKED WITH WINNING ADVANTAGE

New Hydraulic Clutch, Styling, Single Exhaust system, Slim lightweight body and plenty more

PREMIUM HANDLING

SHOWA® Suspension and HRC Launch Control

TASTE THE GLORY

HRC pedigree Championship Winning machine

HONDA SELECTABLE TORQUE CONTROL

Dial the horsepower depending on how much traction is available

NEW POWERFUL 449CC UNICAM ENGINE

Honda’s Unicam cylinder heads combine the best of single- and double-overhead-cam designs. Our engineers redesigned the auto decompression hardware, and also moved it from the right side of the cam to the left. The result is less stalling at extreme low RPM (think deep into a turn without downshifting) as well as better rideability. The 2021 CRF450R also gets a whole new cylinder head. Its biggest feature: an oval-shaped centralized exhaust port. Together with the new single-muffler exhaust, it boosts power from 5000 rpm up and increases exhaust efficiency. Lightweight titanium intake valves cut down on reciprocating mass and permit the use of smaller valve springs, reducing overall engine height.

HONDA SELECTABLE TORQUE CONTROL

Notice that button on the handlebar by the clutch perch? The CRF450R 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.

DOWNDRAFT FUEL INJECTION

The CRF450R features a downdraft intake tract and FI body to help increase both power and fuel-metering precision. It’s part of the reason the CRF450R offers such explosive power and massive torque, especially out of the starting gate and in the critical first 30metres of the race to the first turn. We’ve changed the angle where the fuel-injector fits into the CRF450R’s intake tract. By steepening the angle from 30 to 60 degrees, the injector now sprays fuel all the way back to the throttle butterfly. The engine gets a cooler, denser fuel charge for more power and better torque. It’s little details like this that put the CRF450R up front.

NEW HYDRAULIC CLUTCH

This is huge news for the 2021 CRF450R. Out with the old cable-actuated clutch and in with the first hydraulically actuated clutch we’ve offered outside of our works bikes. Made by Nissin, it’s the same design as in our Grand Prix MX machines and performs better than third-party conversions. You get a clutch-lever pull that’s lighter at its peak, even though it’s paired with a new, stronger 8-plate clutch. Plus, you’ll never have to worry about making a clutch-cable adjustment, even during the longest events. We’ve also made improvements to the clutch assembly itself. Say good-bye to clutch fade—we’ve upped the number of clutch plates from seven to eight, to improve durability and hook up. That means 85 percent less slip at peak horsepower and 27 percent more total torque transmission through the clutch pack.

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 CRF450R will do the rest, launching you into the first turn with a big advantage. It turns your bike into a holeshot-seeking machine!

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. Also, check out the controls on the new 2021 CRF450R. We’ve made them lighter and more intuitive. Controls used to be your bike’s shifter, clutch, and brakes. Now you have things like launch assist, selectable power modes, and more. We believe they should be easy to use, and we’ve just made them easier.

BRAKES

Brakes are for more than just stopping: they help you set up the bike in turns and jumps. Which is why we pay so much attention to detail like brake pads. They’re designed to last longer and give you more stopping power—a real win/win to help you win. The CRF450R’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.

ELECTRIC STARTER

Kickstarting? Maybe if you’re riding in the vintage class, but not here. By ditching the kick-starter entirely, our engineers can make the CRF450R 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 CRF450R is all about.

HANDLING

We’ve increased the front suspension’s stroke by 5mm for 2021, for better handling and rider comfort. Also, we redesigned the axle holding fixtures at the bottom of each fork leg—that increases rigidity, and enhances steering precision and suspension performance.

SHOWA SPRING FORK

The 49mm Showa fork features a conventional spring design that helps increase the CRF450R’s front-suspension precision, handling and feel. The spring rate provides better bottoming resistance and improved handling.

LIGHTER AND NARROWER

Great handling starts with a superior frame and we’ve made some big changes to our 2021 CRF450R’s chassis. First, it’s lighter—about 1 kilogram lighter. By making the frame’s main spars narrower, we saved weight, but more importantly, we made the chassis more responsive by reducing lateral rigidity 20 percent. The result is a bike that gets into, around, and out of corners faster. Body work is slimmer, with less and we reduced the total number of pieces and fasteners needed to remove the body panels so maintenance just got easier too. We totally redesigned the rear subframe to make it nearly half a kilo lighter and along the way simplified its construction too.

NEW LIGHTER SWINGARM

The swingarm is narrower, designed in conjunction with the new frame, by using narrower main members (just like the frame uses narrower main spars), we’ve matched the swingarm’s lateral rigidity to the rest of the chassis. The titanium fuel tank is also light and strong and it maintains the same capacity as our previous plastic unit, while freeing up more space and helping to centralize fuel mass.

NEW BATTERY BOX

Three key features changed here: The battery box is lower, for an improved centre of gravity. Second, it’s also easier to service. Third, it’s now water-tight, so there's nothing to worry about when racing in wet conditions.

NEW SINGLE-MUFFLER EXHAUST

Changing the muffler’s construction to a pressed-alloy design let us reshape it too, its lighter and offers better rider ergonomics. Along with the single-muffler exhaust, naturally we gave the 2021 CRF450R a new single-pipe header. We’ve completely changed the routing too, bringing it 74mm closer to the centre of the bike. It’s lighter, and helps improve weight distribution. The new air filter and new airbox shape helps deliver more torque. You can access the airbox through the left number plate. And because the new filter has no rubber gasket where it interfaces with the intake boot, cleaning and servicing the filter is faster and less messy than ever.

NEW TRIPPLE CLAMPS

The CRF450R is a perfectly matched package. With the frame and swingarm featuring a re-tuned lateral stiffness and the fork legs featuring a new, stiffer axle fixture, we joined the two with new upper and lower triple clamps. Working in concert, they help improve and balance total rigidity, responsiveness and turning performance.

REAR SUSPENSION

The 2021 CRF450R’s new frame design gave us the opportunity to fit a new rear shock. We’ve optimized its shape to match the frame, and gave it new settings to work with the new chassis. The shocks valving resets faster for better response. In addition, we’ve fit a new steel spring that’s way lighter, cutting weight without cutting performance.

BRAKES

Brakes (F): 1x 260mm disc
Brakes (R): 1x 240mm disc

SUSPENSION

Front Adjustability: compression and rebound
Front Suspension Type: 49mm inverted telescopic fork
Front Wheel Travel (mm): 273
Rear Adjustability: preload, compression and rebound
Rear Suspension Type: single shock
Rear Wheel Travel (mm): 315

DIMENSIONS/CAPACITIES

Capacities: 6.3
Wheelbase (mm): 1481
Ground Clearance (mm): 336
Overall Height (mm): 1267
Overall Length (mm): 2182
Overall Width (mm): 827
Seat Height (mm): 965
Kerb Weight (kg): 110.6

ENGINE

Bore & Stroke (mm): 96 x 62.1
Compression Ratio: 13:5:1
Cylinders: 1
Displacement (cc): 450
Engine Type: Liquid-cooled 4-stroke
Fuel System: Fuel Injection
Starter: Electric
Valves: 4
Transmission: 5-Speed
Drive: Chain

TYRES AND WHEELS

Tyres (F): 80/100-21
Tyres (R): 120/80-19

WARRANTY

Warranty: Y

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