How to Adjust Carburetor jet Needle Setting of Honda CD70

How to Adjust the Carburetor Jet Needle Setting of a Honda CD70 or the Carburetor Air/Fuel Ratio Adjustment of the Jet Needle on a Honda CD70. In this video, I am going to show you when to adjust the needle jet, which is a very important part of Honda CD70 carburetor tuning. It is also known as the petrol setting of the Honda CD70. I am going to share information on how atmospheric air density affects the air-fuel ratio and how to correct it to achieve the best performance and mileage from your CD70 motorcycle.

note: only correct air fuel mixture setting will provide better performance and fuel economy. and also going to fix poor acceleration problem in summer and winter. make sure to clean carburetor before adjusting jet needle.

warning: always adjust jet needle clip back to 4th slot when it is winter. running motorcycle on 3rd slot in winter will cause poor performance and engine knocking which will lead to engine failure.

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source of this information about air pressure and density

https://www.noaa.gov/jetstream/atmosp...

link 2

https://www.scienceworld.ca/resource/...

link 3

https://www.ndbc.noaa.gov/education/p...

Chapters

why need adjustment 0:00
Opening Carburetor Slide 1:54
Atmospheric Air Density 2:51
High Elevation 3:15
how to put slide in carburetor 6:46

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