How to adjust the choke value on a screaming eagle carburetor

I would check for a missing vacuum pipe.

If the spark is ok Fuel uel supply is next. The carburetors on these chain saws can really drive you crazy.
Before you touch the carburetor adjustments use some starting fluid directly squirted into the carburetor input with the choke on half choke. Pull several times. If the engine starts or tries to start the carburetor is the problem. Now you have 2 options. A) rebuild or B) replace. Here is the rub You will not find the correct L/H needle screw adjustments. (now restricted by the EPA) If the replacement carburetor is a Walbro go to the Walbro website
http://www.walbro.com/service-manuals/. Find your carburetor and download the info for your carburetor. Remember I told you not to touch the needle adjustments ok it's time now. assuming the are at the factory preset slowly turn each in and note the number of turns of each. This should be the setting of the replacement carburetor. If the settings were disturbed follow the guidelines in the Walbro service manual for your carburetor. Make ONLY !/8 turn adjustments at a time. Depending on your chainsaw model follow the manufacture starting instructions. I have found if it says pull 5 times on full choke then go to half choke and start do that. If you pull the plug and check It should be dry not wet if you pull with the choke on full and the plug our you should smell the fuel mixture. reinsert the plug and try starting again. Good Luck

try hd screaming eagle forums

Go to Harley and buy them over the counter.
Or source some after market replacements from dyno jet , screaming eagle or similar.

Adjust the choke or carburetor. In case your chainsaw stalls when the engine is idling, ensure that the choke is set properly. To do so, first try releasing it to adjust it, and then move the plate and tighten all screws once again. To loosen any grit, spray carburetor cleaner spray on the choke's shaft. The carburetor may also need to be adjusted; consult your owner's manual which will guide you on resetting the idle mix screw.

Carburetor redo or a tune if it's fuel injection.

The specification calls for 900 rpms for the idle speed when warm for the 1987 Dodge Shadow.

One can adjust this with a screw on the carburetor, if it has one.

If it's fuel injected the idle speed is automatically controlled.

Fast Idle Speed HOLLEY 5220/6520 Fig. 5: Turn the adjusting screw with a screwdriver to raise or lower the fast idle speed — make sure that the adjusting screw is resting against the lowest speed step
NOTE: This procedure is performed while the carburetor is installed on the engine.

1. On 1981–82 cars, disengage the two-way electrical connector at the carburetor (red and tan wires).
2. On all years, disconnect the jumper wire at the radiator fan and install a jumper wire so that the fan runs continuously.
3. On 1983–86 models, pull the PCV valve out of the valve cover and allow it to draw underhood air.
4. Disengage the oxygen sensor system connector located on the left fender shield near the shock tower.
5. Ground the carburetor switch with a jumper wire.
6. Open the throttle slightly and place the adjustment screw on the slowest speed step of the fast idle cam.
7. With the choke fully open, adjust the fast idle speed to comply with the value indicated on the underhood sticker.
8. Return the vehicle to curb idle, then reposition the adjusting screw on the slowest speed step of the fast idle cam to verify fast idle speed. Re-adjust as necessary.
9. Turn the engine OFF, remove the jumper wire and reconnect the fan.
10. Reinstall the PCV valve and remove the tachometer. On 1983–86 models, reattach the oxygen sensor system connector, and remove the jumper wire from the carburetor.

Fast Idle Opening MIKUNI

1. Before adjustment, leave the carburetor alone for approximately one hour at 73°F (23°C).
2. Adjust the fast idle opening by turning the fast idle adjusting screw to the following specified values (drill diameter):
   • 2.6L engines equipped with manual transaxles — 0.028 in.
   • 2.6L engines equipped with automatic transaxles — 0.031 in.

Choke Valve Setting MIKUNI Fig. 6: After tightening the choke cover lockscrews, cut the heads off of lockscrews A (total of 3 screws) and stake the heads of lockscrews B (total of 2 screws) with a blunt punch
NOTE: This procedure need only be performed if the carburetor is disassembled.

1. Fit the strangler spring to the choke lever.
2. Assemble the choke valve, aligning the inscribed line or black painted line on the tooth of the choke pinion with the inscribed line on the cam lever.
3. Temporarily tighten the new lockscrews.
4. Set the choke valve by moving the pinion arm up or down, align a punched mark on the float chamber cover at the center of the three inscribed lines, and secure the pinion arm with the lockscrews.
5. Install the choke cover and tighten the lockscrews.
6. Cut off the heads off of lockscrews A.
7. Stake the heads of lockscrews B using a blunt punch.

Vacuum Kick HOLLEY 5220/6520 NOTE: This procedure is performed while the carburetor is installed on the engine. If the vacuum kick is adjusted to open the choke too far, the engine may stall or idle very roughly just after cold start. If it is adjusted so that the choke does not open enough, there may be black smoke in the exhaust. NOTE: To perform this procedure, you will need a hand held vacuum pump capable of producing at least 15 in. Hg (50.6 kPa) of vacuum. The vacuum kick diaphragm may be damaged if you attempt to retract it manually. You will also need a drill or dowel which has a diameter equivalent to the specification for Vacuum Kick in the Carburetor Specifications Chart.

1. Remove the air cleaner. Open the throttle, close the choke and hold it in the closed position, and then release the throttle to trap the fast idle cam in the choke-closed position.
2. Disconnect the vacuum hose at the choke vacuum kick diaphragm. Connect a vacuum pump and apply 15 in. Hg (50.6 kPa) or more of vacuum.
3. Gently move the choke blade toward the closed position just until play is eliminated from the vacuum kick linkage (so that the vacuum kick is determining choke blade position).
4. Insert the drill or dowel into the gap between the upper edge of the choke blade and the air horn wall, toward the center of the gap. The dowel or drill should just fit into the gap. If necessary, rotate the Allen head screw in the center of the diaphragm housing to create the proper gap and then recheck with the measuring device.
5. Restore all vacuum connections and reinstall the air cleaner.

If you are looking for an owners manuel the best bet is to buy one at a dealer, there is no screaming eagle package. Harley has never made a CVO Sportster.

Not unless you have/buy a Screaming Eagle or aftermarket ignition module. What makes you think the timing needs adjusted? It's all computer controlled.