How to Adjust the Motorcycle Needle for Fuel Efficiency?

[SanValentina]

First, unscrew the carburetor cover. After removing the carburetor cover, you can see the spring inside; take out the spring. Then locate the needle position. By pulling outward, you can remove the needle along with the needle holder for adjustment.

[Thaddeus]

Motorcycle Needle Adjustment for Fuel Saving – With 20+ Years of Repair Experience, Method Matters but Don’t Mess Around. First, stabilize the bike, remove the carburetor cover when the engine is cold, locate the needle clip groove, and gently pull it out with pliers. Moving the clip up one notch leans the air-fuel mixture for better fuel efficiency. Test ride on flat roads for a few kilometers—smooth power delivery and tan spark plug color indicate proper tuning. Over-leaning may cause engine overheating, while over-rich mixtures waste more fuel. I recommend cleaning the entire carburetor first—unclogged jets double fuel savings. Finally, measure actual consumption by tracking fuel used over 10 km. Safety first—wear gloves before starting.