2012 Suzuki GSXR-1000, Drops 4lbs, Boosts Mid-Range 
Oct 25 2011, 09:23 AM, updated 15y ago
Surely not the update that Gixxer lovers were hoping for, the 2012 Suzuki GSX-R1000 sees a modest retooling as the Japanese company’s liter bike most noticeably goes back to a single exhaust can design. Officially dropping 2kg (4.4 lbs) from its curb weight, we assume the weight savings to the new Suzuki GSX-R1000 can be accounted purely from the new exhaust layout, though Suzuki lists a number of small weight savings throughout the Gixxer’s refined design. Despite a bevy of minor improvements, the big changes include the addition of a beefier midrange, better throttle response, Brembo monoblock calipers with .5mm thinner brake discs, and an improved fuel efficiency by 8%. Photos after the jump.
Evolving the GSXR-1000′s motor further, Suzuki has lightened Gixxer’s pistons by 11%, while maintaing their strength and durability. The piston-pin bosses are narrower, while the piston skirts are shape-optimized, with asymmetry between the intake and exhaust sides. Additionally, the pistons’ valve recesses are smoother for better combustion efficiency, which creates more torque and better acceleration at low and mid-range engine speeds, as well as better throttle response, and lower fuel consumption.
Other changes in the four-cylinder motor’s design include pentagonal ventilation holes, which help lighten the motor and have lower pumping losses and accordingly better combustion efficiency. Suzuki has also been able to revise the exhaust cam profile for a slight reduction in valve overlap, and has increased the compression ratio to 12.9:1 (up from 12.8:1). The 2012 Suzuki GSXR-1000′s ECU has also been re-mapped to account for the 4-2-1 exhaust system and other engine refinements.
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