User Manual

(EN)

High-Speed Needle (top, left side). Close the high-

speed needle by turning it clockwise until it stops,

then turn it counterclockwise 17 hours out (open).

Low-Speed Needle (on the right side). Close the

low-speed needle by turning it clockwise until it stops,

then turn it counterclockwise 20 hours out (open).

Idle Needle (left, rear 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.

ENGINE TUNING

After the engine is broken in, you can 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.

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: 20 hours from the bottom

• High-Speed Needle: 17 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. Never exceed 1/4 turn in (1 turn out from

closed) or the engine will be damaged.

1 Hour

2 Hours