Engine/EFI/Drivetrain
Hey everyone, I recently purchased a 2009 KFX450R, and it has a low top speed. By low I mean 88km/h (55mph). My gearing is stock (14/38), and I have 20” rear tires. Just did a fresh oil change, and it has an FMF PowerCore4 full exhaust with header and a K&N air filter.