The 2019 Honda CRF450RX was launched in 2017 and based mostly closely on the CRF450R motocross bike. Since then, it’s adopted the identical updates because the motocross mannequin and stays largely just like it apart from the two.25-gallon resin gasoline tank, 18-inch rear wheel, kickstand, sealed chain, Dunlop AT81 tires, and completely different suspension settings.
Associated: 2019 Honda CRF450X First Journey Overview
2019 Honda CRF450RX Engine
Earlier than the shootout started, we mounted a Dunlop D404 road tire on the rear wheel and ran the CRF on our in-house Dynojet dynamometer. The Honda cranked out 53.70 hp at 9,680 rpm and 33.17 pound-feet of torque at 7,710 rpm, rating it first in horsepower and third in torque. After the dyno pulls had been full, we fitted Dunlop AT81 tires, as we did on all the bikes to make sure consistency in traction amongst them for everything of the take a look at.
Associated: 2019 Honda CRF250RX First Journey Overview
The 2109 Honda CRF450RX has the engine character of a fighter jet. It’s simply the quickest and most aggressive within the shootout. Its free-revving character mixed with its gentle and responsive really feel makes it essentially the most thrilling too. Engine-braking is minimal and the powerband is kind of broad. It’s crisp off the underside, barks within the midrange and top-end, and revs to the moon.
The engine runs greatest within the midrange to top-end, however continues to be very responsive at low rpm. It will probably simply be lugged and ridden a gear excessive, however when doing so and utilizing the clutch excessively, it might fade and make the lever really feel a bit inconsistent. In comparison with the Yamaha YZ450FX, KTM 450 XC-F, and Husqvarna FX 450, the Honda’s clutch pull is by far the heaviest. It’s additionally the loudest bike with its brief twin mufflers and huge airbox openings.
The 2019 CRF450RX comes with a handlebar-mounted engine mode choose button that has three preprogrammed maps—map 1 (normal), map 2 (easy), and map three (aggressive). Map 1 has respectable bottom-end and comes on sturdy within the midrange. Map 2 has much less of a definite hit within the powerband—nearly traction control-like. Map three has essentially the most bottom-end and is the simplest map to lug the bike low within the rpm, particularly when using a gear excessive. Most take a look at riders most well-liked map 2 (easy) because it supplied greater than sufficient energy for off-road using and vet motocross tracks. Regardless of being the mellowest of the three maps, the CRF was nonetheless a handful on tighter, technical trails, which was exacerbated by the stiff clutch pull.
2019 Honda CRF450RX Suspension
Much like the engine, the Honda CRF450RX’s suspension is constructed for pace. The Showa 49mm coil-spring fork and Showa shock have a performance-oriented really feel. The sooner you experience the bike and the tougher you push it, the higher the suspension works. It lacks some sensitivity and luxury within the preliminary a part of the stroke when hitting small bumps at decrease speeds, however it excels when the speeds enhance with good mid-stroke help and wonderful bottoming resistance. The shock feels a contact stiff compared to the fork. Making changes to the Honda’s suspension needs to be completed incrementally as only one click on could make a noticeable distinction.
2019 Honda CRF450RX Chassis/Dealing with
The 2019 CRF450RX weighed in at 257 kilos on our automotive scales, making it the heaviest bike within the shootout. Contrarily, it’s the lightest-feeling and nimblest whereas using. The bike has a smaller total really feel however not in a cramped type of method—nearly prefer it’s shorter than the three different bikes within the shootout. It corners the sharpest, however in flip offers up some stability on excessive pace, tough terrain. The Honda could be very delicate to setup. It has a noticeable excessive rear finish stance and works nicely with 106mm to 108mm of shock sag.
One of many greatest variations the 2019 Honda CRF450RX has over all the different bikes is its rear wheel traction. The design of the chassis places a lot weight on the rear wheel when accelerating—at occasions it’s unbelievable. Even on the steepest of hills, it continues to drive ahead and resist making an attempt to wheelie. The counter impact is that the entrance wheel can, at occasions, lose just a little traction in case you get lazy together with your physique place. With braking and cornering, it is vitally necessary to remain as ahead as potential to keep up entrance wheel traction.
The Honda CRF450RX is barely wider within the midsection and much more so within the gasoline tank and radiator shroud space. The gasoline tank can be tall. In accordance with Honda, it was designed that method for security necessities—to permit extra airflow across the radiators and engine. Other than that, the handlebar bend and place are agreeable, and so is the final rider place. Additionally, we like that the 2019 CRF450RX is supplied with a skid plate however would additionally want to see it include hand guards in inventory trim as nicely.
Why It Ought to Have Gained
The engine makes essentially the most horsepower on the rear-wheel dyno and is the quickest on our seat-of-the-pants dyno. The suspension works nicely at for faster-paced off-road using and on the motocross observe. The CRF additionally provides the nimblest dealing with, sharpest cornering, and lightest weight really feel.
Why It Didn’t Win
Whereas the Honda will be the simplest to go quick on, it’s extremely delicate to rider errors, which might make it unpredictable at occasions. The engine generally is a bit too aggressive for tighter single-track using and the clutch pull is the stiffest. The gasoline tank can be pretty giant and cumbersome, which has a unfavourable impact on the cockpit with the broader entrance radiator shroud space.