The Suzuki’s 999cc liquid-cooled engine goes unchanged for the most part, although revised pistons, pentagonal crankcase vents and a new exhaust cam have been incorporated. The pistons are perhaps the most changed, and feature newly shaped skirts plus narrower pin bosses. The slugs are a claimed 11% lighter than the previous model’s examples, plus “the valve recesses are smoother for better combustion efficiency,” claims Suzuki. As a result, the bike’s compression ratio climbs slightly from 12.8:1 to 12.9:1.
Similar to the 2011 GSX-R600 and GSX-R750, the 2012 GSX-R1000 runs pentagonal shaped crankcase ventilation holes. Compared to conventional ventilation holes, the new design provides less mechanical pumping loss. Bigger news is that the big-bore Suzuki runs a revised exhaust cam, which offers reduced valve overlap and increased midrange power. Internally, the only other change is to the valve tappets, which now feature thinner skirts and weigh 2.5 grams less per tappet, resulting in less reciprocating weight at high rpm.
2012 Suzuki GSXR 1000
2012 Suzuki GSXR 1000
2012 Suzuki GSXR 1000
2012 Suzuki GSXR 1000
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