What is clip position on a carb?
The top needle clip position is the leanest position available. This is because the needle is sitting farther down the inside of the atomizer or emulsion tube, restricting the fuel flow for a longer period of throttle slide travel. The bottom needle clip position is the richest position available.
Does needle clip position affect idle?
The needle position has no affect on idle, it basically affects mixture around the 1/2 throttle range. If you need to change the WOT mixture you need to change the main jet, then change the needle to suit half throttle needs.
What does moving the needle on a carburetor do?
Some needles have adjustable height positions while sitting in the slide. An E-clip sets the position, and that position is often referred to as “the clip.” Moving the clip up will lower the needle, making it leaner.
Where is the clip on an old Honda carb?
The “screw” is idle mixture only. I’d be looking inside the carb at the jet numbers and where the clip is set on the jet needle in the slide. Maybe someone screwed with it and it’s set too rich – provided it had multiple clip grooves.
Can a needle be adjusted on a carb jetting?
If your needles can be adjusted, there will be a clip on the needle and possibly a washer under the clip. The lower the needle hangs into the carb, the less fuel you get. By adding a washer under the clip or needle head, you raise the needle up out of the carb, thereby increasing fuel supply in the mid RPM range.
Where does the fuel go in a Mikuni carb?
Fuel comes through the main jet and into the needle jet. So the main jet does affect the needle, especially as the throttle opening increases. The needle is attached to the slide and slides up and down within the needle jet.
Where is the air slide on a CV carb?
In common CV or constant velocity carbs the top of the carb houses the barrel, air diaphragm or air slide. This area can be confusing and frustrating to those unfamiliar with it. Slowly, take the top off the carb and it should expose a long spring and the air slide.
The “screw” is idle mixture only. I’d be looking inside the carb at the jet numbers and where the clip is set on the jet needle in the slide. Maybe someone screwed with it and it’s set too rich – provided it had multiple clip grooves.
How to adjust the carburetor on a Honda Trail?
The engine should be idling consistently without hesitation or racing. Turn the throttle stop screw, located on the right side of the carburetor’s throttle valve cylinder, to adjust the idle speed, as needed to adjust the engine idle speed.
Where is the needle jet in a carburetor?
The needle jet—or nozzle as it’s sometimes called—is located in between the main jet and the carburetors venturi. Fuel comes through the main jet and into the needle jet. So the main jet does affect the needle, especially as the throttle opening increases. The needle is attached to the slide and slides up and down within the needle jet.
How can I lower the needle on my carburetor?
Some needles have adjustable height positions while sitting in the slide. An E-clip sets the position, and that position is often referred to as “the clip.” Moving the clip up will lower the needle, making it leaner.