Suzuki S-TRE (Smart Timing Retard Eliminator). How the Smart Timing Retard Eliminator works. GSX1300R (Hayabusa) - 1999 > 2019. S-TRE stands for "Smart Timing Retard Eliminator". When we speak of timing, we are referring to at what point the ignition spark occurs, relative to the position of the piston.
