The reason the lipo works and not the others is it has more voltage going to the motor ( a moderate torque motor) trying to pull non-torque up gears with a 400 fps spring. The motors you are using do not have enough torque with a lower voltage to power the 13.1 ratio gears through the spring cycle. This is why you need a high c /high mah discharge battery and good fast and torque motor with higher fps springs. These gears are meant to be fast not easy to pull hence the need for the other upgrade parts.
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WOLFPACK U-96
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Last edited by MADDOG; January 10th, 2013 at 22:04..
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