Suzuki Advanced Cooling System

Suzuki continued to use the system in its GSF (Bandit) and GSX (GSX-F, GSX1400, Inazuma) lines until the 2006 model-year and DR650 from 1990 to present.

While addressing reliability issues in Suzuki's only turbo charged bike, the XN85, the SACS system was first conceived by Etsuo Yokouchi, who looked to World War II–era aircraft for inspiration.

Like air-cooled motorcycles, radial engines used in many early aircraft suffered from heat and reliability issues.

Therefore, the SACS system was applied to the bike's design and was eventually carried over to all larger GSX-Rs.

The final GSX-R SACS engine appeared on the Suzuki GSX-R1100 in 1992, later bikes featured water cooling.