The 2027 Honda CRF450R marks a significant milestone in the motocross world as the company embarks on its most extensive overhaul in over a decade. With direct input from HRC factory teams competing in Supercross, Pro Motocross, and MXGP, every major system has been reworked to deliver a motorcycle that is nearly 10 pounds lighter than its predecessor.
The resulting weight reduction of 6 pounds is achieved through a combination of downsizing components, changing crankshaft profiles, and switching journal bearings. This results in a more efficient conversion of combustion pressure into rotational force, with less friction at the bearings and gear-engagement points.
Honda engineers have made significant changes to the engine, including increasing the bore by 1mm to 97.0mm, shortening the stroke by 1.3mm to 60.8mm, and raising the compression ratio from 13.5:1 to 13.8:1.
The new engine design also features a DLC coating on the top piston ring, reducing friction and improving durability. Additionally, both intake and exhaust valves are now larger, with improved cam profiles and optimized included angles between valves.
Honda's redesign of the intake system eliminates the lid of the previous design, routes air more directly to the filter, and uses a filter with revised density and a rounder shape. This results in reduced airflow resistance by approximately 10 percent.
The exhaust system has been redesigned for the new engine and to meet the AMA's tighter sound limit of 109.9 dB. The header is 3.4 inches longer, and the muffler is 3.0 inches longer, featuring a dual-resonator design to manage noise while optimizing power delivery.
Honda claims these changes have resulted in a more efficient conversion of combustion pressure into rotational force, with less friction at the bearings and gear-engagement points.
The new clutch design introduces a new technology from Honda, featuring a basket diameter reduction of 7mm to 132mm. This results in improved performance and reduced weight.
Honda's extensive overhaul of the CRF450R showcases the brand's commitment to innovation and performance. The resulting motorcycle is lighter, more efficient, and better equipped for competition.
The modest $400 price increase to $10,099 reflects the significant improvements made to the bike, with Honda's focus on delivering a high-performance motocross experience.
The 2027 Honda CRF450R sets a new standard for motocross bikes, with its cutting-edge tech and innovative design. Riders can expect improved performance, reduced weight, and increased efficiency.
Honda's latest motocross bike is designed to deliver exceptional performance and handling, making it an attractive option for serious competitors and enthusiasts alike.
Honda's extensive overhaul of the CRF450R showcases the brand's commitment to innovation and performance.
