The Spec R engine had a lighter flywheel, high compression pistons, stiffer valve springs and longer camshaft durations. The cylinder heads were also ported and polished and these special engines were hand tooled at the factory. They show the potential of the other engines if you take your time...
KB75H DAMPER ASSEMBLY INSTRUCITON The damper assembly can effectively reduce the pressure fluctuation of the discharge system by storing and discharging the liquid, thereby obtaining a more uniform flow. The KB75H damper assembly is suitable for high pressure mud pumps with a working pressure of ...