The New Fireblade CBR1000RR-R
65 Years ago, Soichiro Honda was determined to have a winning motorcycle. So, he set out to build a bike with an engine that would out-perform every other engine on the planet. Racing is the essence of our heritage, and THIS is 2021 CBR1000RR-R Fireblade SP, a brand new bike from the ground up. The CBR1000RR-R Fireblade SP’s all new 1000 cc in-line four-cylinder engine has been designed with heavy input from the HRC Moto GP development program. It shares the same ‘over square’ 81 mm bore and 48.5 mm stroke as the RC213V making this the largest bore size among inline 4 litre bikes. Compression ratio is set at 13:1. The inlet valves are 32.5 mm diameter, with 28.5 mm exhaust; they’re also now operated by finger-follower rocker arms (as opposed to bucket valve drive) which reduces inertial weight by approximately 75%. Friction is further reduced by the use of Diamond Like Carbon (DLC) on the cam lobes. The valve train is driven by a new semi-cam gear train system. To drive such high-RPM/high-cam lift performance, the chain is driven from the timing gear located on the crank shaft via the cam idle gear – this makes it shorter in length. Air is fed into the engine through a ram-air duct located at the high-surface pressure tip of the front fairing; the size of the aperture is equivalent to that of the RC213V MotoGP machine. Now, to draw the volume of air needed, the throttle body diameters have been enlarged from 48 to 52 mm. An oval internal cross-section makes for smooth flow – and further reduces intake pressure drop – from the throttle butterfly valves to the inlet valves. Mirroring the intake side, the four exhaust downpipes have optimised diameters and an oval cross section to improve gas flow. The catalytic converter unit is 10 mm larger in diameter to reduce exhaust pressure drop, and careful adjustments of wall thickness have minimised any weight increase. The Throttle-By-Wire was derived from the system used on the RC213-V for faster response through a range of partial throttle applications – such as gradual opening on corner exit – to minimise any delay in torque delivery. There are three default riding modes, with options to change engine output and character. POWER operates through levels 1-5 with 1 giving ultimate power. ENGINE BRAKE manages performance on a closed throttle through levels 1-3, with 1 being the strongest engine braking, and finally WHEELIE, with levels 1-3 (plus off) with 1 giving the weakest intervention. Wheelie control uses information gathered by the Bosch six-axis Inertial Measurement Unit on pitch angle, along with front and rear wheel speed sensors to maintain torque and deal with the wheelie without sacrificing forward drive. Honda Selectable Torque Control adjusts through 9 levels (plus off) and now adds slip rate control to moderate rapid wheel spin. In conjunction with the existing outright slip control, HSTC is smooth in operation while delivering maximum confidence for the rider. The CBR1000RR-R Fireblade SP is also equipped with Start Mode for race starts. It limits engine RPM at 6,000, 7,000, 8,000 and 9,000 set-points, even with a wide-open throttle, letting the rider focus on clutch release. For full and intuitive control of the Fireblade systems, the full-colour 5-inch TFT screen is large with higher resolution. It’s fully customisable to show exactly what the rider wants to see. The compact left-hand switchgear houses a four-way switch. Fast and easy to use, the top/bottom buttons set riding mode parameters, while the left and right buttons cycle screen display information. This bike now features the Honda Smart Key System. This is both convenient in day-to-day use and has allowed use of a competition-style top yoke while freeing up optimum space for the ram air system. Reducing the physical size of the engine allowed for a new frame and swing arm with revised geometry. The goal? More accurate high-speed steering, improved stability under acceleration and hard braking and better feel for front and rear grip when you’re pushing your bike and yourself to the limit The diamond frame is constructed from 2 mm aluminium and allows much more accurate tuning of the chassis rigidity. There have also been considerable changes to balance and centre of gravity; the crankshaft is 33 mm further from the front wheel spindle and raised 16 mm. This evens out weight distribution, while the higher centre of gravity reduces pitching and improves side-to-side agility. For optimum frame rigidity, the top mount of the Pro-Link rear suspension attaches to the rear of the engine block. This also isolates the rear wheel from the headstock, improving high-speed stability and feel for rear wheel traction. The CBR1000RR-R Fireblade SP is also equipped with Showa’s new Honda Electronic Steering Damper as well as Second-generation semi-active Öhlins Electronically Controlled suspension. New Brembo Stylema four-piston radial mount brake calipers are operated by a Brembo master cylinder and brake lever. The discs are 330mm with 5mm thickness to dissipate heat more efficiently. Plus the rear brake caliper is the same Brembo unit used by the RC213V-S. Alongside its new engine and chassis, the CBR1000RR-R Fireblade SP has an aggressive new fairing design It’s no mere styling exercise; the goals in development were to create a class-leading drag coefficient with a tucked-in rider under track conditions, and restrict lift under acceleration while improving braking stability. To make steering easier a convex surface on each side of the front mudguard moves air flow away from the front wheel, smoothly directing it to the fairing sides. The lower fairing has been extended close to the rear tire and shaped to channel air downward. This has two effects: in dry conditions, less air hits the tire, lowering drag; in wet conditions, less water hits the tire, improving grip. To generate downforce at track speeds – and maintain the smallest possible frontal area – the CBR1000RR-R Fireblade SP employs winglet structures that effectively generates the same downforce as the RC213V MotoGP machine. The results are a reduction in wheelies under acceleration and increased stability on braking and corner entry. This new Fireblade is truly something unique in the marketplace and represents a rare opportunity for very few owners. If you’d like to be one of these lucky owners, visit honda.ca (honda.com).