How do I tune my main jet?
How-To tune a main jet
- Step 1 – Warm up the bike to operating temperature.
- Step 2 – Install a brand new spark plug(s).
- Step 3 – Perform a wide open throttle (WOT) plug chop.
- Step 4 – Read the plug.
- Step 5 – Determine if you are lean or rich based off plug color.
- Step 6 – Repeat all steps.
Do you need to test your KTM carburetor?
KTM carburetor parts need to be tested, prior to use, especially during the changing seasons. Jeff will explain and demonstrate the process of testing your KTM carburetor to ensure that it is ready for riding use. In this video, Jeff gives all the clues and methods for testing the pilot circuitry through the KTM carburetor.
How do you change the piston on a SU carburettor?
It must be replaced (See Checking and cleaning an SU carburettor ). With the air cleaner off, the piston can be lifted with a screwdriver. The jet should be screwed up as high as the bridge if possible. Remove the air cleaner and the dashpot screw-in top and damper. Use a screwdriver to raise the piston.
How do you adjust the jet needle on a carburettor?
Before and after adjustment, check that the jet needle is central in the jet. Stop the engine, use the damper to lift the piston to the top of its travel and let it drop. It should fall smoothly with a sharp click. If it does not, the jet is out of line and you must centralise it. An off-centre jet may also score or bend the tapered needle.
How to replace the carburetor main nozzle on a Honda?
The main nozzle is referred to synonymously as an emulsion tube. Helpful items include a socket wrench, needle-nose pliers, a piece of wire, a flathead screwdriver and a pick. For other Honda HRX217 lawn mower parts, visit: http://www.ereplacementparts.com/hond… SUBSCRIBE AND NEVER MISS ANOTHER VIDEO! http://www.youtube.com/subscription_c…
What should I do if my CARB is not jetting?
If it doesn’t solve the problem then you’ll need to check the jet needle and then the needle jet. Don’t mess with all three jets at once. Change the main jet first and see if that solves the problem. If it doesn’t, you’ll need to reestablish the main jet to its original position and then move on to the jet needle and so on.
Can you change the needle jet on a carb?
However, you only need to tinker with the main jet and if that solves the problem you found the easy solution. If it doesn’t solve the problem then you’ll need to check the jet needle and then the needle jet. Don’t mess with all three jets at once. Change the main jet first and see if that solves the problem.
How to fine tune a KX carburetor needle clip?
You take your main jet that is for a CF=1, say a 200. Multiply 200 by the CF=.9 to get 180 as the new main jet. This gives you a good place to start your fine tuning. Needles are a little trickier, I think each needle clip was worth a change in CF of 0.1 on my KX.
What does jetting the carburetor on a dirt bike do?
In simple terms jetting your dirt bike’s carburetor is determining the proper air-to-fuel ratio the engine receives. Running the correct ratio of fuel and air makes your dirt bike run optimally. Installing jets of different sizes helps increase/decrease the fuel/air ration depending on what your bike requires.