Adjusting The High Speed Needle - Team Losi 8IGHT Instruction Manual

Vehicle Tuning
After the engine is broken in, tune it for optimum performance. When tuning, it is critical that you be cautious of overheating as severe damage and pre-mature wear can
occur. Make all carburetor adjustments in "one hour" increments.
Before making adjustments:
• Ensure there are no leaks or obstructions in the fuel tank, fuel tubing or the
carburetor. Any faults can affect engine operation and tuning.
• The carburetor needle is very sensitive. Adjusting the needle even 1/12 of a turn is
a significant change. Be careful when making adjustments.
Factory Needle Settings:
Low Speed Needle: 18 hours from the bottom
High Speed Needle: 30 hours from the bottom
Carb Adjustments:
Make all carburetor adjustments in
one-hour increments.
Imagine the slot in the needle is the
hour hand on a clock. Adjust it as
though you were moving the hour
hand from one hour to the next or
previous one.
NOTICE: When making adjustments, only turn the needle 1/12 turn at a time.

Adjusting the High Speed Needle

Turn the high-speed needle until you achieve the ideal engine temperature and
amount of exhaust smoke. The engine should have a noticeable smoke trail during
initial acceleration and fade to a minor smoke trail when the engine reaches full
throttle.
If the engine exceeds proper running temperature, 265 F (129 C), richen the high-
speed needle immediately. If the engine temperature is very low considering normal
running temperature, then lean the high-speed needle.
NOTICE: If the high-speed needle is too lean, it will cause a high idle speed.
Adjusting the Low Speed Needle-Idle Adjustment
Turn the low-speed needle to adjust the engine idle speed. Once you have achieved
a proper idle speed, you can turn the low-speed needle by one hour in either
direction to reach the optimal engine performance. Leaning (turn in) produces a
higher idle speed. Richening (turn out) produces a lower idle speed.
Turning Off the Car
1. To turn off the car, simply move the car's receiver power switch to the off
position. This will eliminate power to the CDI and will turn off the engine.
2. Power off the transmitter.
8
Low-Speed Needle
(on the Left side). Close
the low-speed needle
by turning it clockwise
until it stops, then turn it
counterclockwise
18 hours out (open).
1.
EN
High-Speed Needle (top, Right
side). Close the high-speed needle
by turning it clockwise until it stops,
then turn it counterclockwise 30
Idle Needle (Bottom of carburetor).
The engine includes an idle needle
for carburetor function, however it is
not used for engine tuning. DO NOT
ADJUST THE IDLE NEEDLE.
2.
LOSI 8IGHT • INSTRUCTION MANUAL