Yamaha's Fazer becomes even more brutal
from Motorcycles (330 articles)
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Image Gallery ( 22 images )To complement the internal engine modifications that are aimed at enhancing the 998 cc R1-based engine’s power delivery characteristics, the engine runs with revised 5th and 6th gear ratios in order to optimise rear wheel drive force in the most commonly experienced speed range.
Another significant difference between the R engine and new FZ1 /FZ1 Fazer powerplant is the adoption of a lower compression ratio, which is down from 12.4:1 to 11.5:1 by adjusting gasket thickness.
At the same time, Yamaha’s engineers have also developed new camshafts with milder profiles which, together with all the other specific features, make for superb flexibility combined with a truly exciting riding experience.
For consistently strong running performance the new FZ1 /FZ1 Fazer are fitted with a large capacity curved radiator with a coolant capacity of 2.5 litres. Equipped with dual ring fans, this high-efficiency design offers a radiation capacity of 29 kW for effective heat dissipation in all conditions.
The wide range of technical changes featured on the new models has helped to create a new class-leading sports bike engine. Delivering 150 HP at 11,000 rpm – together with extremely high levels of rear wheel drive force, these new motorcycles are designed to offer riders the exhilaration of a supersport machine combined with the day-to-day versatility of a street bike.
The new FZ1 and FZ1 Fazer benefit from a completely new cast aluminium frame which has been designed to match the performance characteristics of the re-tuned 998 cc R1-based engine.
The compact new frame is 89 mm narrower than the 2005 design, and has been manufactured using Yamaha’s pioneering metal mould casting system which allows its designers to build in an idealised rigidity balance for excellent handling qualities. This is achieved by varying the thickness of the aluminium in one millimetre increments to obtain the desired levels of rigidity in any one place.
For example, rigidity around the head pipe and swingarm pivot are at the highest level, while a degree of balanced flex has been deliberately engineered in at strategic points to enhance feedback from the road surface. By doing so, the engineers were able to create an all-new lightweight frame design which offers the optimum balance of vertical, torsional and lateral rigidity.
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