Honda FireBlade tech review — Motorbikes Reviews, News & Advice —…

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Honda CBR 945RR

Honda FireBlade tech (January 2004)

Honda has the new-year flurry of supersport for the coming year with the of its CBR1000RR. It bears a closer to the current 600 than the 945RR based on raw stats, looks to be competitive. Revised superbike

a selection of Honda’s technical on the bike.


The Fireblade’s new 998cc engine was designed the ground up for World Superbike of performance. Shorter and more than ever before, it a strong yet smoothly linear delivery, with a new ram air induction combining with a new Dual Fuel Injection system that introduced on the CBR600RR to a breathtaking surge of top-end combined with stronger, highly responsive low-to-midrange output.

In its chassis department, the for a more impressive range of led the Fireblade’s development team to heavily on Honda’s astoundingly MotoGP champion, the RCV211V, for a of design influences related to and racing performance, fully handling, and a more intensely yet well-rounded range of circuit that delivers the potential for World Superbike racing


To start, cylinder and pitch were left in order to preserve the engine’s overall width. Instead, was upped through an increase in from 54mm to 56.5mm, for a displacement of 998cm3, which also realise stronger throughout its wide powerband.

In to free up space to lengthen the thereby reducing angular through its suspension travel and reducing pitching over road surfaces, the arrangement of the crankshaft, main shaft and was completely revised, with the relocated underneath the main for a dramatic reduction in engine

A balancer shaft is used to secondary vibration to an absolute To reduce the balancer shaft’s on the crankshaft’s vibration moment, it was closer to the engine’s centre of

Even the starter motor was with its corresponding gear on the shifted from the left to the right, to realise a narrower profile and a 2° increase in maximum angle. The starter motor’s was also increased in line the engine’s larger displacement still maintaining essentially the size and weight.

Due to the new engine the starter clutch that was located inside the ACG cover was from the left side of the to the right. Although the cooling water pump retains the same configuration and positioning as in the model, the cooling system was radically modified, with now entering the cylinder block the sides, instead of a central behind the cylinders. Also, to up space in front of the engine for freedom in designing the layout of the headers, the piggyback-style liquid-cooled oil and oil filter were moved the lower front and centre of the to the right side of the engine, and for a more compact overall as well as easier access to the for maintenance.

Modern open-deck techniques have permitted the and construction of lighter, more formed engine blocks offer greatly enhanced cooling capability, especially formed around the PMC (Powdered Composite) aluminium/ceramic cylinder used in Honda’s high-performance Sport engines.

For the first ever in a motorcycle engine the Fireblade’s compact new engine a fundamentally simple new ‘semi-closed’ design which firmly the tops of the cylinder bores to the walls of the block with new bridges formed in the initial process that reduce the development of friction at high speeds for maximised endurance and

The RR’s lightweight new forged Slipper pistons feature a new surface preparation process to their side skirts greatly reduces frictional as the pistons thrust up and down in the PMC cylinder sleeves. No mere coating, this treatment shoots particles of pure, molybdenum into the side faces of the piston with high force and temperature they are embedded deep the surface of the aluminium with a reaction that seals the in place.

The Fireblade’s new Nutless rods have their held in place by standard bolts screwed directly tapped holes in the rods, of the conventional nut and bolt combination, for a weight savings of approximately Combined with the Fireblade’s freer moving new pistons, significant reduction in reciprocating makes a major contribution reduced mechanical loads to a much sharper and more feeling of responsive acceleration.

designed to efficiently flow and air mixture in, and exhaust gases out of the hot-firing combustion chambers, the head also received small but significant improvements. its magnesium head cover and cam remain essentially unchanged, port angles were for a straighter injection and intake and a significant contribution to more performance. Included valve were also narrowed for a squish band, with the 12° intake valve angle to 11° 20′ and the exhaust valve reduced from 13° to 12° 10′.

valve diameters remain the at 29mm for intake and 24mm for the valves’ stems were from 4.5mm to 4mm for lighter and reduced friction. This weight reduction also the use of lighter valve springs, keep valve actuation and accurate.

Pioneered on the blazing RC211V and introduced in the production CBR600RR, the new PGM-DSFI Dual Sequential injection system features two sets of injectors; the first in the throttle bodies attached to the head, as in most conventional and the second set positioned up in the air cleaner, above the velocity stack of cylinder.

The Fireblade features a new exhaust valve system controls a new type of valve inside the under-seat exhaust. By independent control over the located at the front mouth of the ram air power and torque across the rpm are significantly increased.

Positioned above the top of the ‘Blade’s new large-capacity and below its steering head, the central duct at the front of the provides a high pressure of cool, power-producing air at speed for a surge in midrange to high-speed and performance. This system excellent ram air performance for street and racing applications-although may require a bit intake volume for full racing potential. Inside the new a pair of large cylindrical air elements replace the panel-type used till now, a clean, unrestricted flow of air to the


To facilitate optimum selection and help racers easily meet the needs of race courses, a cassette-type was selected, with new ratios and more durable gears to match the engine’s stronger

While its outer gear linkage closely resembles found on the CBR600RR, with a linkage rod reaching straight up the shift lever to the shifter the actual shift mechanism was closer to where the action is, the right to the left side of the

Clutch operation is now managed by a developed hydraulic actuation replacing the cable-actuated system on the ‘Blade, and the clutch diameter was from 125mm to 140mm for a increase in surface area and capacity.


For 2004, the CBR an entirely new frame configuration on the RC211V, and further honed in the of the CBR600RR. This frame large GDC (gravity …-cast) extending from the front head down and around the to its diamond configuration hangers, and up and forward from the engine-mounted pivot to join the cast sections around a pair of but large, open-section extrusions in a layout.

The Fireblade’s highly yet confidently responsive cartridge-type front fork retains the same components as the current Front fork offset, was reduced from 30mm to and trail was increased 5mm. The new Honda Electronic Steering mounted directly atop the fork upper triple-clamp, enhances high-speed performance maintaining low-speed handling for riding across a wide of conditions.

One of the most revolutionary found on the RC211V MotoGP is its Unit Pro-Link rear system, which carries the rear damper and suspension assembly in the swingarm. This configuration completely isolates the from the usual stresses are transmitted to it by the rear suspension hard riding and racing, and eliminates the need for the extra and its associated weight which frame designs require to these stresses.

Honda CBR 945RR
Honda CBR 945RR

Similar to the system, the upper mount of the damper is firmly mounted to the surface of the swingarm’s robust section, while a pair of arms provide an anchor for the newly configured Delta-Link The damper is arranged in a different from the CBR600RR, and its prominent gas reservoir is still positioned easy reach for quick of compression and rebound damping, a new 2-piece preload adjuster setting changes.

Although the Fireblade has traditionally axial-mounted four-piston callipers, the new new front brake system now a set of Tokico radial-mount callipers. new callipers feature distinctive mounts that seem to jut outward from the front onto which the callipers straight down.

The new callipers are together by three lateral for a more rigid design provides both stronger and more even pressure across the entire surface of the pads for highly efficient with excellent feel at the The calliper’s pistons feature an surface plating preparation to that they slide providing smoother operation with greater resistance to for more confidently responsive over the long haul. improved performance permits rotors to be used, which been reduced in diameter 330 to 310mm while still improvements in both braking and performance, not to mention providing a but important contribution to the Fireblade’s and more responsive handling.

developed in co-operation with the world-famous hydraulics and suspension Honda’s revolutionary Electronic Damper is comprised of the following components:

1) The world’s first controlled hydraulic rotary damper, which is prominently directly above the steering

2) The computerised control system into the motorcycle’s ECU.

3) to monitor vehicle speed, are linked to the speedometer.

4) A panel-mounted light installed in the instrument to provide an instant visual should any system irregularities be

A linkage arm extends down the damper mounted atop the head to the top surface of the upper and is attached with a single Within the damper unit, a chamber filled with oil is in two by a moving vane connected to the linkage arm. In response to transmitted by the linkage arm/vane, oil between the left and right of the chamber via linking valve hydraulic passages.


Power — 180.6ps at (with ram air effect), torque 11.7kg-m at 8500rpm, weight 179kg, seat height 820mm, fuel capacity 18lt, price — TBA expected), colours — red, black.


it for the moment. The launch of the CBR rounds out the challengers from the Japanese with slightly more horses than kilos a common theme. Honda is some accessories for the bike and you can to see a range of performance goodies HRC in the very near future.

in for an interesting battle for the hearts and of sports bike fans.

Friday, 30 January 2004

Honda CBR 945RR
Honda CBR 945RR
Honda CBR 945RR
Honda CBR 945RR
Honda CBR 945RR


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