How to adjust CV carburetor mixture on Harley?
If adjusting the existing stock mixture screw instead of installing an EZ-Just, use a small flat head screwdriver and turn the screw clockwise until it GENTLY seats. DO NOT OVER TIGHTEN AS THIS WILL DAMAGE THE NEEDLE SCREW TIP. Count how many turns it takes to reach the closed seated position.
What kind of engine does a Sportster have?
05/1200C with SI-II AC and HD 49 state script exhaust. 48 pilot, 185 main with stock needle (no shims) and 1.75 turns out on mix screw. I think I’m on the lean side on the slow, but I’m leaving it in there as I’m hitting Colorado this weekend… 48/180 seems awfully rich for an 883, but what do I know? All bikes like different things.
Can a 1957 XLCH ironhead Sportster fit’s & s cycle?
Note: S&S Cycle Super carbs will not fit 1957-1970 XLCH Ironhead Sportster models with vertical magnetos due to clearance issues with the fuel inlet and magneto, S&S Cycle no longer offers the alternative fuel inlet.
Do you need a jet kit for a Harley Davidson Sportster?
If you have a carburetted Sportster (1957 – 2006 models) you’ll need to look at changing your carburettor jetting via an appropriate carburetor jet kit. For 2007 and newer Sportster models you’ll need to re-map the EFI (electronic fuel-injection).
How do you reinstall a CV carburetor on a Harley?
Reinstall the carburetor back on your bike by reversing the steps taken during removal. Be sure to replace the fuel hose clamp, cables, and vacuum lines in the exact same location. Make certain the carb firmly seats back onto the manifold boot as a proper seal is critical. Test the throttle for binding and smooth operation.
Where is the carburetor located on a Harley Davidson?
The CV style Harley carburetor has a small cylindrical tower protruding from the bottom rear of the spigot (behind the bowl). The tower is plugged with a soft metal insert covering the mixture screw.
When to adjust the mixture on a Harley Davidson CV?
Anytime you rejet or change exhaust or air cleaner intake it is suggested to adjust the mixture. The mixture screw or EZ-Just is the key to proper tuning. These tuning steps apply to all Harley CV carbs from 1989 to present that use the CV 40mm style Harley Davidson carburetor but also apply to the CVK40 found on other models.
Do you have to remove the carburetor when tuning a Harley?
Always start with a fresh set of spark plugs when tuning. The carburetor will need to be removed from the manifold so refer to your factory shop manual for this procedure. With the carburetor removed, place upside down on a sturdy work surface.
What to do when your CV carburetor is not working?
If unable to find the low adjustment point where the idle slows, simply set the screw at 1-3/4 turns out and proceed to the next step. If the engine will not idle on its own during this procedure, adjust the idle set screw on the throttle side of the carburetor until it idles correctly.
What kind of screw driver do you need for a CV carburetor?
You will need a small screw driver for adjusting the screw unless an EZ-Just has been installed. With the engine idling slow (no more than 900 rpm), turn the screw inward (clockwise) SLOWLY until the engine starts to stumble. You are working with the screw upside down so check to make sure you are turning the screw clockwise or inward.
What kind of carburetor does a Harley Davidson use?
Harley Davidson Pilot Jets for CV Carburetors are normally sold in sizes 40, 42, 45, 48, 50, and higher. A Stage 1 Carb Kit will normally offer you a proper range of jets for your particular model.
If adjusting the existing stock mixture screw instead of installing an EZ-Just, use a small flat head screwdriver and turn the screw clockwise until it GENTLY seats. DO NOT OVER TIGHTEN AS THIS WILL DAMAGE THE NEEDLE SCREW TIP. Count how many turns it takes to reach the closed seated position.
If unable to find the low adjustment point where the idle slows, simply set the screw at 1-3/4 turns out and proceed to the next step. If the engine will not idle on its own during this procedure, adjust the idle set screw on the throttle side of the carburetor until it idles correctly.
You will need a small screw driver for adjusting the screw unless an EZ-Just has been installed. With the engine idling slow (no more than 900 rpm), turn the screw inward (clockwise) SLOWLY until the engine starts to stumble. You are working with the screw upside down so check to make sure you are turning the screw clockwise or inward.
Harley Davidson Pilot Jets for CV Carburetors are normally sold in sizes 40, 42, 45, 48, 50, and higher. A Stage 1 Carb Kit will normally offer you a proper range of jets for your particular model.