R6 based, 599cc, liquid-cooled, DOHC, 16-valve, slant block inline four powerplant. Virtually all the internal engine components are R6 spec including crankshaft, con rods, valve sizes, bore & stroke etc.
• The difference between the R6 and the FZ6 engine is the camshafts have revised cam profiles and slightly different intake tracts for more low to mid range power.
• One-piece cylinder and upper crankcase assembly provides superior rigidity.
• Compact slant-block engine uses stacked gearbox shafts to create a shorter engine for optimum in placement in the frame for a balanced weight distribution.
• \"Liner-less\" cylinder has special ceramic composite plating applied directly to the aluminum cylinder for greater heat dissipation, reduced frictional losses and reduced oil consumption.
• 6-speed transmission has been optimized to accommodate the engine character of the FZ6. The secondary reduction ratio is 46/16 (Vs. a reduction ratio of 48/16 for the R6).
• \"Group-Type\" 36mm throttle body fuel injection provides outstanding throttle response and excellent fuel economy. This system uses fewer sensors (5) than the R6 (7) while also being lighter and more compact.
• Group fuel injection divides the four cylinders into two groups (1 & 4 and 2 & 3) with two injections of fuel for every 720 degrees of crank rotation (the R6 system utilizes a sequential injection for each cylinder).
• Compact \"high dynamic range\" injectors use 4 jet / 2-direction spray type injectors. A high powered 32 bit CPU controls the injection process.
• Progressive type throttle pulley and direct coupler type TPS (throttle position sensor) provides easy throttle control without the annoyance of FI surging.
• 6.3 litre airbox is \"optimized\" to take full advantage of the R1 inspired downdraft intake system.
• Air Induction System (AIS) reduces hydrocarbon and carbon monoxide (HC & CO) emissions.
• 4 into 2 into 1 into 2 stainless steel exhaust system features a stylish under seat muffler that is a one piece design unit with dual outlets. A special resin cover protects the muffler and keeps hot components away from the rider and passenger.
• A special connecting pipe joins the header pipes between cylinders #2 and #3 pipes to provide outstanding low to mid range torque.
• The exhaust system uses a catalytic converter to reduce harmful emissions such as CO, HC, CO2 and NOx into less harmful by products. The result is very clean running engine that easily surpasses the new EU2 European emission standards.
• High capacity radiator with ring-type cooling fan insures maximum cooling efficiency.
• Liquid cooled oil cooler maintains consistent oil temperatures for extended engine and lubricant life.
• R6 based clutch assembly is utilized but the clutch boss, spring rate and friction plates are specially designed for the FZ6.
• Maintenance-free transistor controlled digital ignition ensures fast starts and optimum engine performance.
FZ6-ZN
