HONDA CRF250R

Low-rpm combustion stability and gas flow in, and out, of the chamber served as main focus. Headlines are a revised air intake funnel and cone tube, fed by a 78% larger- capacity airbox, now 4.1L, an injector angle now set at 60° (rather than 30°) and a straight exhaust port. Air intake efficiency is improved, alongside air intake cooling. The air filter’s also easier to access.