Belt Tension Adjustment

The 4-Tec has two drive belts that can stretch or become damaged over time due to normal wear. The rear belt in the 4-Tec transmits most of the motor's power. Because of the high loading on the rear belt, the tension should be checked every 3-4 hours of running. If the rear belt can be deflected more than 0.25" (6mm), the belt tension cams should be rotated rearward to the next eccentric slot. The 4-Tec's front belt is designed to have a high initial tension. During the first few runs, the drive belts and pulleys will "wear in" and the belt tension will gradually decrease. Traxxas recommends replacing the front belt if it can be deflected more that 0.25" (6mm). Traxxas offers a replacement drive belts (Part No. 4361 - front; 4362 - rear) for the 4-Tec, which are available at your local hobby shop.