❏
12. Remove the lower screw from each of the body posts
so that the posts can be placed upright. Re-install the screw
through the shock tower into the body post as shown. The
height of the body can be adjusted by raising or lowering the
posts on the shock tower.
❏
13. Apply the decals to the body if desired.
❏
14. Remove the body clips from the parts bag. Place the
body onto the body mounts. On each body mount place a
body clip.
You are ready to go! Watch the video one more time and
turn to page 16 for performance and maintenance tips.
To shift the Thunder Quake from forward to reverse, simply
bring the truck to a complete stop then flip the switch on the
top of the radio to the REV position. The Thunder Quake
should now be in reverse. To shift the truck back into
forward, simply stop the vehicle and flip the switch to the
FWD position. It should now be in the forward motion.
The High-Speed Needle
The “high-speed” needle is sticking up from the side of the
carb. It is located in the brass housing, just above the fuel
inlet. It controls the fuel to air mixture of the carb. The needle
is pre-set for break-in from the factory at 3 turns out from the
fully closed position of the carb. Once the engine is broken-
in, the high-speed needle would typically run from 2-1/2 to 3
turns out from closed, depending on the weather, humidity
and altitude above sea level. To richen turn the needle
counterclockwise, to lean turn the needle clockwise.
The Low-Speed Needle
The “low-speed” needle is the screw in the carb body,
opposite the throttle arm. It controls the fuel to air mixture at
low throttle settings. There is a simple way of adjusting the
low-speed needle correctly called the “pinch test.” With the
engine at idle, pinch the fuel line and listen to how the engine
speeds up or slows down. If the engine increases its speed
for about 2 or 3 seconds and then loses speed, the needle is
set correctly. If the engine loses RPM quickly, it is set too lean
and the low-speed needle needs to be opened
(counterclockwise) to richen the mixture. Pinch again to
check the mixture. If the engine takes longer than 4 seconds
to slow down, lean (clockwise) the low-speed needle and
then pinch again to check the mixture. Typically, adjustments
should be made in 1/8 turn increments.
The Throttle Stop Screw
On the front of the carburetor, there is a black screw. This is
called the idle stop screw. This increases or decreases the
idle RPM without changing the fuel to air mixture. The barrel
should be approximately 1.5mm (between 1/32" and 1/16")
from fully closed.
CARBURETOR SETTINGS
FORWARD / REVERSE OPERATION
BODY
6
