Table of Contents
Are all carburetor jets the same?
Different carbs take different style and sized jets. Theres not 1 style jet for every keihn carb.
What are the different jets in a carburetor?
On the bottom for the carburetor you typically have two jets. The pilot, the smaller of the two, and the main jet.
How do I choose a jet size?
A larger jet number means a bigger hole and more fuel. A smaller jet number has smaller holes and should be used if your engine needs to run leaner. Whether your machine is running too lean or too rich is a good starting point for choosing your jets, but using a jet calculator minimizes trial and error later.
What does the secondary jet do in a carburetor?
The throttle blades on the secondary barrels stay closed. As rpm increases, the engine requires more air and fuel to make power, and this is when the secondary barrels kick in. As the secondary barrels begin to open, more air travels through the carburetor, supplying the engine with the air and fuel it needs.
How to change the jet in a carburettor?
Step 1. Changing jets Changing the jets in a carburettor can be done with it still installed in the bike, but to make it easier to remove the pilot jet, we removed the carby from the bike. Undo the two hose clamps around airbox boot and engine intake to free the carburettor, and loosen the subframe bolts to make it easier to get it out. Step 2.
Does the diameter of the jet in a carburetor affect fuel flow rate?
The diameter of the main jet metering orifice determines the fuel flow rate, hence the slightest difference could alter the air-fuel ratio. Although a carburetors’ jet comes out-of-the-box pre-calibrated for normal conditions, it can be replaced if necessary with another jet with a different hole diameter.
What is a fuel jet on a car?
In simple terms, jets are small threaded plugs with a tiny metering orifice throughout its center that control the amount of fuel entering the carburetor’s venturi. They are considered metering components usually made from brass.