A further pedigree racing detail is the standard gearshift assistant of the new 2012 BMW R1200S, also described as an automatic gearshift. The system allows rapid gear change without reducing the gas or using the clutch. If the gear lever is activated, the electronic engine controlthrottles back the ignition angle and reduces the injection. This means the power unit is at “low load” for the gearshift so it is possible to change gear rapidly without needing the clutch. The gearshift assistant operates under normal riding conditions and, on request, for racing with an inverted switching scheme (pressure sensor as special equipment). However, if the rider actuates the clutch, the system remains inactive. The 2012 BMW R1200S therefore always leaves the decision of whether or not the gearshift assistant is deployed to the driver.
 |
| 2012 BMW R1200S |
The steel tube midframe comes from the BMW R 1200 S, but was adapted to the new single-piece and self-carrying CFK rear in the area around the location points. The front wheel suspension is provided by the stable, approved telescopic lever construction. Its trailing link is supported by a specially tuned hlins sport spring strut with compensating tank, adjustable in tension and compression stroke damping as well as in the spring pre-tension. The expanded surface around the slider clamping device in the lower fork brace allows fine adjustment of the vehicle height.
The upper fork brace and the two adjustable high-quality stock handlebars flange-mounted in the crankshaft throw are made from fully milled, forged aluminium parts. The main brake cylinder and the clutch master cylinder with radial pump coupling fixed by quick-release clamping calipers usually found in racing are also used here.
The Paralever rear wheel suspension also originates from the BMW R1200S, but in the BMW HP2 Sport it has an Öhlins sporting spring strut with com-pensating tank adjustable in all aspects. Thanks to the longitudinal
adjustment integrated in the spring strut the vehicle height can also be varied at the rear. This means the chassis geometry of the BMW R1200S can be individually optimised for different racing circuits. Every BMW R1200S is supplied as standard with an exclusive toolset which can be used to make all settings
on the chassis components.
 |
| 2012 BMW R1200S |
 |
| 2012 BMW R1200S |
The BMW R1200S runs on specially developed, weight and stability optimised, surface-milled forged wheels of size 3.5 x 17” or 6.0 x 17”. These are considerably lighter than conventional die-cast wheels, but have comparable high stability. The handling characteristics benefit enormously from the smaller rotating masses. The sports Boxer is really easy to steer on bends and allows incredibly rapid change of direction.
The forged wheels are fitted as standard with sports tyres in 120/70 ZR17 format at the front and 190/55 ZR17 at the rear. These tyres from renowned manufacturers generally used only on the racing circuit such as the Supersport championship, for example are homologated for use on asphalt road surfaces. The engineers decided on a 55 series tyre cross-section as this achieved the best results for the overall characteristics in tests.
The braking system of the new BMW R1200S also presents itself as uncompromisingly sporty. Single-piece, radially mounted four-piston brake calipers from Brembo that hold the two 320-millimetre discs powerfully in its grip are used on the front. The radial screw connection is effected by a new die-cast foot on the lower part of the Telelever. A double sliding piston decelerates the rear wheel. It goes without saying that
the hydraulic application of the brake calipers is activated by high-quality, steel armoured brake lines.
BMW Motorrad offers an ABS adapted to sporting events as an option. The function of the system has been optimised to prevent the rear wheel from lifting. An additional pressure sensor in the front brake circuit provides sensitive regulation of the system and the control unit prevents the front wheel brakes from opening too early when the load on the rear wheel is greatly reduced. Nevertheless the ABS can be deactivated for racing events.
Even at the outset of the development, the engineers focussed on the seat position. Compared to the BMW R 1200 S, the rider moved closer to the handlebar resulting in a notably more upright seat position oriented towards the front wheel and behind the ‘waistline’ of the fairing. More importantly, the remarkably slim design of the tank area favours the rider’s weight displacement (hanging off) on the racing circuit.
 |
| 2012 BMW R1200S |
forwards or backwards. Stepped setting positions of the footrests make sure that identical adjustment is possible on both sides. At the same time, the likewise fully adjustable brake and gear lever allow optimal positioning of the operating elements.
The range of high-grade racing components includes the adjustable footrest system made of milled, high-strength aluminium. An eccentric cam is used to adjust the height of the footrests and to move them
forwards or backwards. Stepped setting positions of the footrests make sure that identical adjustment is possible on both sides. At the same time, the likewise fully adjustable brake and gear lever allow optimal positioning of the operating elements.
All the fairings of the BMW HP2 Sport are made from carbon where the single-part rear as well as the front fairing are realized as self-supporting elements. The latter has a noticeably slimmer construction than the BMW R1200S and houses lightweight, high-luminosity halogen twin headlamps with free-formed surface reflectors. Special details include the number plate carrier of the BMW R1200S : It can be removed along with the tail lamp and indicators in a few easy steps before taking part in a race.
0 comments:
Post a Comment