VFR800
In 1998 the 749 cc VFR750 was replaced by the re-designed VFR800Fi which had a displacement of 781 cc and fuel injection. The engine was for the most part the same as used in the RC45 racing bike. A notable change was the relocation of the cam gear drive system from the centre of the motor to the side which slightly increased the sound of the cam gear whine. This revision also featured Honda's DCBS linked brake system.
In 2002 Honda released the sixth generation VFR engine which dropped the gear-drive for the cams in favour of cheaper, lighter and quieter chain-drive. The new engine also adopted a VTEC system which operates only two valves per cylinder below 6,800 resulting in improved torque, fuel economy and emissions compared to non-VTEC engines. Above 6,800 rpm the VTEC allows all four valves per cylinder operate for maximum power.
Read more about this topic: Honda VF And VFR