6 — TUNING VEHICLE PERFORMANCE
Curtis Model 1226 – September 2019
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pg. 70
Some users prefer a soened feel, while others set Gear Soen to 0% because they prefer a linear vehicle
response. When you set this parameter, take into consideration that soened slack take-up is easier on the
transaxle gears and may extend the transaxle operating life.
Note: You probably won’t notice much of a dierence if you’re using a brand new, tight transaxle.
5. Congure So Start by taking the following steps.
a. Release the vehicle to neutral.
b. Apply full throttle. Notice how the transaxle gears bump when you apply the throttle.
Note: You’ll feel a transaxle bump only if the gears are meshed in the opposite direction when torque is
applied. You may need to nudge the vehicle backwards against the brake when experimenting with this
parameter.
c. Release the vehicle to neutral.
d. Set So Start to 40%.
A So Start value between 0%-40% is recommended. Values in the 0%-40% range avoid excessive delay when
starting from neutral.
e. Apply full throttle. Notice how increasing the parameter soens the vehicle startup while adding a
small amount of nonlinearity to the acceleration rate.
f. Repeat the previous steps until you are satised with the way the vehicle accelerates from neutral.
These setup and tuning procedures cover the most critical aspects of vehicle performance. Additional
parameters can be used to make further adjustments, if necessary. See Programmable Parameters on page 27.
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