Suzuki S-TRE (Smart timing retard eliminator)
This listing is for an S-TRE to fit the following motorcycles
GSXR600 - 2001 on
GSXR750 - 1998 on
GSXR1000 - 2001 on
TL1000R - 1998 on
TL1000S - 1998 on
SV1000 - 2003 on
DL1000 (V-Strom) - 2002 on
GSX1300R (Hayabusa) - 1999 on
GSX1400 - All years
GSR600 - 2006 on
GSF1250 (Bandit) - 2007 on
GSF650 (Bandit) - 2007 on
(Please check the manufacture date of your motorcycle, not the registration date)
How the Smart Timing Retard Eliminator works
Suzuki has limited the torque available through gears 1 to 4 up to 50%
throttle. They have done this by retarding the ignition timing to such
an extent that the result is a lower performing engine. The S-TRE will
eliminate this problem.
The S-TRE alters the signal sent from
the GPS to the ECU in turn the ECU then sends out un-restricted signals
to the engine resulting in a higher performing motorcycle (full details
below).
The S-TRE and how it works:
Suzuki has limited the torque available through gears 1 to 4 up to 50%
throttle. They have done this by retarding the ignition timing to such
an extent that the result is a lower performing engine. The S-TRE will
eliminate this problem. The S-TRE alters the signal sent from the GPS to
the ECU in turn the ECU then sends out un-restricted signals to the
engine resulting in a higher performing motorcycle
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. The optimum place for the spark of ignition to
occur is just slightly before the piston hits top dead centre. If the
timing is just right maximum torque will be provided from the firing of
that piston.
If the ignition is timed too early (a long time
before top dead centre) then the fuel and air mixture is ignited while
the piston is still travelling towards top dead centre therefore some
energy produced is wasted fighting this upward momentum.
If the
spark takes place too late (any time after top dead centre) the piston
is already travelling down therefore the fuel and air mixture is NOT
fully compressed when the combustion occurs as a result there is less
downwards force gained from the combustion (It produces less than
maximal torque). Hence, the correct timing is crucial to maximize the
efficiency of the combustion and accordingly torque produced.
In the first 4 gears of your EFI motorcycle, Suzuki intentionally
programmed the timing to produce less than maximum torque, presumably to
protect the rider from the full power. However,
this limits the power and smoothness of your bike up to 50% throttle in
gears 1 through 4.
The S-TRE (Smart Timing Retard Eliminator)
overcomes this limitation providing a smoother more responsive throttle
in gears 1, 2, 3 & 4. The S-TRE also recognises when neutral is
selected as a result maintaing a smooth idle and not affecting the cold
start fast idle feature.