| Figure 6 with Table 6 show an
example of a throttle system. The throttle system allows you, the driver, to
control the speed at which the engine runs. As the throttle control on the
engine is moved forward, the engine speed (RPM) increases. Again, as with the
braking system, the system becomes more complex when a spring return is added to
release the the throttle when the driver takes their foot off the pedal. Unlike
the braking system, however, a spring return is required on the throttle system
for the driver's safety. |
| In order for the throttle to
release to the idle position, the extension spring must be pulling against the
force you provide to increase the throttle speed. To accomplish this task, mount
one end of the spring to a fixed object on the frame, the other end to the
throttle rod. The fixed end should be further towards the back of the go-kart
than the movable end of the spring if using an EXTENSION spring, otherwise a
COMPRESSION spring should be placed between a fixed stop and the rod end (see
Figure 6). |
| To control the range of throttle
movement, stops need to be placed on the throttle rod or cable (Figure 6 shows
stops on the rod). In general, a stop needs to be larger than the opening
through which if is passing. A wire stop only needs to be larger than the
housing through which the wire posses. |
| The throttle cable itself is
attached to the throttle control on the engine, and the other end is attached to
the foot pedal either directly or by a throttle control rod. A throttle control
rod, as shown in Figure 6, is simply a rigid connection from the foot pedal to
the throttle cable. Both the throttle control cable and/or rod must be able to
move back and forth freely, but with o limited range of motion as mentioned
previously. |
|
If your engine has manual friction control throttle, you will need
to convert if to an adjustable governor control in order to adjust the throttle
with a foot pedal. To do this you will need to follow these steps: |
 |
|
1.) Remove the air cleaner from the engine in order to get at the
manual friction control.
2.) Remove the bolt shown at right.
3.) Remove
the link as shown and discard.
Your engine is now ready to accept a foot pedal controlled
throttle cable. |
|
Figure 7 with Table 7 show how the throttle cable is attached to
the Briggs and Stratton engine. This assembly requires Northern Hydraulics kit
#2449, which bolts to the governor slide below the gas tank on the side of the
engine. With this kit attached to your engine's throttle control, your throttle
will spring back to the idle position when released. The throttle system shown
in Figure 6 provides a stronger spring to accompany the spring in kit #2449, but
is not necessary. |
|
The kill button switch allows you to shut off the engine from the
drivers seat, which is important for the driver's safety. Mount the switch on
the go-kart frame where if is easy to reach from the drivers seat. The spade end
of the wire attaches to the ground stud on the control panel of the engine
underneath the gas tank (see Figure 7); most engine manuals will inform you of
where this ground stud is located on the engine. When the button on the switch
is pushed, the engine is grounded and kills the electric current in the engine,
thus turning it off. On some engines it may be necessary to remove the wire
between the stud and the ground switch, otherwise every time the throttle is
released the engine will quit. |
|
|
|
|
Dia.# |
Item # |
Description |
Qty. |
| 1 |
13820 |
Gas Pedal |
1 |
| 2 |
13823 |
Throttle Control Rod Kit |
1 |
| 3 |
13824 |
Kill Button Switch |
1 |
|
|
|
|
|
|
|
Dia.# |
Item # |
Description |
Qty. |
| -- |
2449 |
Throttle Cable Spring Kit |
1 |
| 1 |
-- |
Spring Throttle Return |
1 |
| 2 |
-- |
Spring Anchor |
1 |
| 3 |
-- |
Cable Clamp |
1 |
| 4 |
-- |
Hold Down Screw |
1 |
| 5 |
-- |
Stop Screw |
1 |
| 6 |
-- |
Cable Retainer |
1 |
|
