HONDA CBR600F4I

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Honda CBR600F4i
Cbr600f 2004.jpg
ManufacturerHonda
Production2001–2006
PredecessorCBR600F4
ClassSport bike[1]
Engine599 cc (36.6 cu in) DOHC four valves per cylinder water-cooledinline-four
Bore / Stroke67.0 mm × 42.5 mm (2.64 in × 1.67 in)
Compression ratio12:1
Top speed156 mph (251 km/h)[2]
Power81 kW (109 hp) @ 12,500 rpm[citation needed], 90.1 hp (67.2 kW) at rear wheel[2]
Torque63 N·m (46 lbf·ft) @ 10,000 rpm[citation needed], 40.2 lb·ft (54.5 N·m) at rear wheel[2]
Ignition typeCDI
TransmissionWet clutch, 6-speed, chain drive
Frame typeAluminum twin-spar, box-section
Rake, Trail24.0°, 96 mm (3.8 in)
Wheelbase1,390 mm (55 in)
Seat height805 mm (31.7 in)
Weight370 lb (170 kg)[citation needed] (dry)
440 lb (200 kg)[2] (wet)
Fuel capacity4.8 US gallons (18 l; 4.0 imp gal)
Fuel consumption36.7 mpg-US (6.41 L/100 km; 44.1 mpg-imp)[2]

The Honda CBR600F4i was a sport bike[1] produced by Honda from 2001 to 2006.

For the 2001 model year Honda released an upgraded version of the popular CBR600F4 with intentions of becoming more competitive in the middleweight sport bike class. The 370 lb (170 kg) (dry) F4i is a modified F4 with numerous engine, chassis and bodywork changes.History

The single largest change aside from the styling is the addition of high-pressure (50 psi) programmed fuel injection — thus the model designation "F4i". In a number of countries, the bike was sold in both the "normal" and "Sport" variants, the Sport having a two-part seat, no grab rail and no main stand (though the main stand mounting holes remained). Fuel injection allows for more precise fuel metering and delivery over a wider rpm range, while providing better throttle response and reducing emissions. The injectors reside one per cylinder and work with 38 mm throttle bodies. Each injector has four nozzles, and together the injectors add up to five horsepower over the F4.
Weight was also reduced. The rear wheel was made 400 grams lighter, the cush drive 600 grams, and the front wheel 300 grams. The wheel bearings have been moved outward, closer to the fork tubes, and the rotor carriers moved out closer to the brake calipers to reduce weight and to improve rigidity. Each caliper carrier also lost 100 grams. There is additional bracing on the steering head for more response, better feedback and feel from the front end. The suspension has also been tweaked with less high-speed damping and a little more low-speed damping. The wheelbase is five millimeters shorter than its predecessor, with a 5.9-percent increase in overall rigidity.
Additional engine changes include a lighter camshaft sprocket and increased valve spring pressure (two springs per intake valve) which allow for higher revving. There are new piston rings that slide with less friction and increased internal engine oil flow. Redline is now 14,200 rpm, 700 rpm higher than the previous year's F4. To increase the bike's pulling capabilities at high speeds, 5th and 6th gears have been shortened slightly and the rear sprocket was enlarged from 45 teeth to 46. The oiling holes in the camshafts have been enlarged by 0.5 mm (to 2.5 mm) and piston ring friction has been decreased to aid cooling at the higher rev ceiling. Spring pressures on the intake and exhaust valves have been increased to avoid valve float. Also, there are now two valve springs (inner and outer) on the intake side instead of the single item that resides on the exhaust side.
In 2003, Honda introduced the CBR600RR, a higher-performance, race-ready, super-sport middleweight, while continuing to manufacture the popular F4i which appealed to those willing to sacrifice a little performance to gain a more comfortable riding position, as well as an engine configuration better suited to everyday riding. The F4i remained available for three more years before being discontinued, with the 2006 model being the final one to be released. In 2006 the Honda CBR600F4i retailed for US$8,499. No major updates were made in these final years except for color scheme changes.

[edit]Styling

Honda included some styling changes due to criticisms of the F4 being too bland[citation needed]. The 2001 US F4i features a new subframe which raises the seat by five milimeters and an improved two-tier seat allows for more storage room in the rear compartment. The new tail unit has less padding and a higher perch for the passenger. The F4i’s tail-light is smaller with a new dual-bulb configuration. The F4i features a new dash layout with a large analog tachometer. The new LCD digital display includes a speedometer, odometer, clock, engine temperature read-out, amber shift light, and trip meters.
The F4i's new bodywork carries a more 'racy' look and provides a 3% reduction in drag. It also houses a new dual headlight front cowl design which uses 40% brighter H7 bulbs compared to the old H4 bulbs. The headlights are dual multi-reflector units covered by a one-piece flexiglass lens. The turn stalks are shorter and the mirrors are now positioned higher and closer to the rider. The elimination of carburetors allowed for a slightly larger air box and a larger fuel tank (4.8 us gallons / incl. 0.9 reserve) complete with a delayed fuel level sensor to prevent false readings when the bike is at an angle.
In 2004 Honda replaced the black frame with one in silver and a banana seat due to complaints of comfort and to differentiate the F4i from the 600RR. This model is the same as the CBR600F1 and onwards that was sold in the UK from 2001.
Two UK versions of the F4i were released in 2001. The CBR600F F1 and onwards had the banana style seat found on pre PGM FI bikes whilst the CBR600F FS1/FS2 (the F sport) were sold with the two tier seat units, black frames and various other performance upgrades as found in the US models. The F sport was discontinued upon the arrival of the CBR600RR in 2003.

[edit]References

  1. ^ a b "Performance Index '10", Motorcycle Consumer News (Bowtie Magazines), 2010, retrieved 2010-01-03
  2. ^ a b c d e "Performance Index ‘07/’08 Version" (Adobe PDF). Motorcycle Consumer News. January 2008. Retrieved 2010-01-11.

[edit]External links

Wikimedia Commons has media related to: Honda CBR600F

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