Initial Setup:

1.  Set NORMAL MODE curves to default, 0%, 25%, 50%, 75%, 100%.

2.  Set THROTTLE TRIM to 0% (all the way down).

3.  Set Endpoints (ATVs) to 100% - 100%.

4.  Turn off radio.

Linkage Setup:

1.  Measure from the center of Servo Arm to center of Throttle Arm.

2.  Adjust the THROTTLE LINKAGE to the measurement taken from above (step 1) from the center of the ball link to the center of the ball link. A = A

3.  Screw a ball to the SERVO ARM and the THROTTLE ARM at equal distance from the center. B = B

4.  Connect one end of the Throttle Linkage to the Throttle Arm. DO NOT connect the other end of the linkage to the servo arm.

5.  Study the diagram below for EQUAL and UNEQUAL Throws.

6.  Turn on the radio.

7.  With the THROTTLE stick at the low position, 0% stick travel and trim to minimum, pull the throttle linkage towards the ball on the servo arm so that the throttle arm is rotated to its maximum limits. Take note of the servo’s ball location in respect to the ball link. Refer to the diagram below.

8.  With the THROTTLE stick at the high position, 100% stick travel and trim to minimum, push the throttle linkage towards the ball on the servo arm so that the throttle arm is rotated to its maximum limits. Take note of the servo’s ball location in respect to the ball link. Refer to the diagram below.

9.  If the alignment is correct, the servo ball should be exactly equal to the ball link from either side of center. Refer to Equal Throw diagram.

a.  If not equal, loosen the screw on the throttle arm and rotate the arm so that the alignment of the servo ball is equal on either side from the center of the ball link as per the Equal Throw diagram.

b.  Check the alignment from the 0% stick position and the 100% stick position for Equal Throw. Repeat this process until Equal Throws can be obtained.

10.  In order to get equal alignment, you will need to loosen the throttle arm on the carburetor. To do this, slightly loosen the throttle arm so that the arm is snug but still able to be rotated. Check the alignment again for equal throw diagram, A, B, C. Once this is achieved, tighten the throttle arm screw and check alignment again from 0% stick and at 100% stick. Repeat until Equal Throw is achieved.

11.  In Drawings A & B, move the ball in or out on the servo arm (or throttle arm) to center the ball on the ball link as per drawing C. If drawing C cannot be achieved by moving the ball, then the End Points on both the low stick and high stick position on the radio need to be adjusted equally, so that the servo ball is aligned in the center of the ball link. Repeat the process in step 10 until equal throws can be achieve.

12.  Using this method, you should be able to have 100% end points mechanically or equal amount of end points at 0% stick and 100% stick.

13.  If your end points are excessive, say 80% / 80% or 120% / 120%, move the ball in or out from the center of the servo arm and the throttle arm. The optimum percentage mechanically should be 100% on both ends.

14.  If your objective is to achieve a faster throttle movement, move the ball further out on the servo arm and reduce the endpoints to around 80%. Your endpoints determine the speed and resolution per linear stick travel. Decreasing your end points and moving the ball further out on the arm will give you a quick throttle responds and a less resolution per linear stick travel. Increasing your end points and moving the ball closer to the center of the servo arm will decrease the speed of your throttle responds and greater resolution per linear stick travel.

15.  The trick here is the measurement from center to center, servo arm screw to throttle arm center. This measurement is transferred to the throttle linkage rod ball link center to ball link center. Do not by any means readjust this link during the alignment process.