sentences:  In the past, smaller manufacturers were allowed to build as few as 150 bikes to meet the homologation requirements.Manufacturers took advantage of this by producing 'homologation specials'--highly tuned versions of their road bikes with performance parts designed especially for racing.The 2008 SBK championship was dominated by Troy Bayliss of Australia, on his Ducati 1098, who concluded his season and his career with a double win at the brand new, 195-million-Euro Portimao circuit in Portugal, after which he retired.