Honda CRF 450R
LIGHTER. FASTER. AND RAZOR SHARP.
THE REDESIGNED 2021 CRF450R & CRF450RWE
How many corners are there on your favorite motocross or Supercross track? Because 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. And lighter than ever, the CRF450R explode out of corners when it’s time to increase your lead.
NEW, SLIM BODYWORK
We’ve slimmed down the CRF450R’s bodywork, and reduced the total number of pieces. It makes it a lot easier to move around on the new bike, and that maximizes your riding freedom. While we were at it, we reduced the total number of fasteners needed to remove the body panels—maintenance off the bike just got easier too.
FRESH NEW STYLING
A bike the works as well as the 2021 CRF450R should look just as good, right? That’s why we freshened up the overall graphics package. Plus, our “in mold” graphics help keep your bike looking good. We think the only thing that could make it look better is a big ol’ First Place trophy sitting on the seat. We did our part—the trophy is up to you.
NEW AIRBOX AND FILTER
Along with the new air filter, the 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 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 ten percent 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.
TITANIUM FUEL TANK
Grams and performance count, and the CRF450R uses a titanium fuel tank. Light and strong, it maintains the same capacity as our previous plastic unit, while freeing up more space and helping to centralize fuel mass.
449cc 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.
NEW FUEL INJECTOR BODY POSITION
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.
TITANIUM INTAKE VALVES
Lightweight titanium intake valves cut down on reciprocating mass and permit the use of smaller valve springs, reducing overall engine height.