Hello, I have a 2004 Sportster. I have installed a Screamin Eagle air cleaner, slip on on mufflers & a carb kit. All Sceamin Eagle. When I installed these parts the bike was an 883. I then had my local Harley dealer install the 1200 upgrade. After that when the bike was hot, when I would start it there would be a big knock. Not all the time, but most of the time. The dealer says it's nothing to worry about. It's just starting on the compression stroke. Maybe... But it's a loud knock! When I installed the carb kit, before the 1200 kit, the instructions had me reduce the main jet from 175 to 170. I have since went from 170 to 180 & now have a 190 jet in it. The knock has almost disappeared. I doesn't blow any black smoke when I "romp" on it. I live at about 2000'. Some rides take me over passes that are about 4500'. My question is, Did I do the right thing? Also, can I go to a larger jet? I still have a 200 jet in the carb kit. Any help would be appreciated. Thanks for your time. Dave. Colville WA.
Dave, simplest way to determine that is reading the plugs.... if they are whiteish means its running hot and could use a larger jet .... Have u tried that ?Dave, simplest way to determine that is reading the plugs.... if they are whiteish means its running hot and could use a larger jet .... Have u tried that ?
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To begin with, make sure you're putting too much oil in the tank. But, oil blow out into the breather is common on these bikes. Thanks to the EPA, all vented air from the engine must be cycled or run through the engine to be burned. This is why Harley moved the engine breather vents to top of the heads, to reduce the amount of oil in the air vented from the engine. However, it still builds up in the air cleaner and must be cleaned out occasionally. As the engine gets more and more mileage on it, the rings allow more compression to get by them resultling in more crankcase pressure blowing out more oil mist.
I think Custom Chrome and Kuryaykin, aftermarket accessory suppliers, has a kit to relocate the crankcase vent so that you air cleaner is not filled with oil. You can order the kits through any aftermarket dealer and sometimes even you Harley dealer.
Screamin Eagle mufflers work well. I've been running a set on a Dyna Wide Glide for years. They're not as loud as straight pipes. They come with removable baffles, I think. It's been years since I've mess with them but they used to. Also, some pipe manufacturers made "slip on" muffler replacements. They're much better for performance too as they present the engine with a bit of backpressure that the drag pipes do not.
not a good idea unless you upgrade the air cleaner to a high flow or screaming eagle...bike is tuned to run with restricted pipes..if you change one you need to change the other..with the 06 you could also need a download or fuel management system..
The service manual says to "remove the carb" for this job.But yes you can remove the main jet out without removing the carb out.You can rotate the carb and slide it off the intake, but watch how much slack you have in the cables, remove the bottom plug that adjusts the fuel mixture.Take the seat/tank off and loosen both the 3mm bolt and philips mounting screw so you could turn the carb to were you could remove the big bottom 17mm bolt .When you look up into the bolt hole with a light you can see two access holes for both the main and the pilot jets.the pilot can be changed by tilting the carb bottom to the left and removing the big bolt on the bottom. It's accessible without removing the float bowl. To get the needle out, you need to pull the seat and tank, remove the carb top cover (3mm allen bolts), remove the 4mm allen bolt on top of the slide, being careful not to lose the spring and other parts (3 pieces total). Pull the needle out with a needle nose and you're set. The main jet is replacable from the 17mm cap on the bottom. Your needle tube/jet may come out with the main jet but is no biggy. You can drain the float bowl before doing it if you loosen the little 3mm bolt on the bottom of the bowl. Just be sure to readjust the throttle cables after you move the carb back. Tilting the carb pulls all the slack out of the cables and the bind a bit if you dont pull them back.You can remove the main jet with a main jet tool or a 1/4 inch socket. If the needle tube jet (long skinny tube that the main jet threads into) comes out with the main jet, simply unscrew it from the main jet with an 8mm wrench and the tool you used to take out the main jet.You can put the new main jet back in the tube first and then replace the tube back into the carb. The needle will be hanging out of the bottom of the carb where the tube goes. Because you have the carb at an angle the needle will be hanging at an angle, so you need to "thread" the needle into the tube to get it to go back in.Be sure not to over tighten the main jet because you can break it off. Also when you turn the carb, the front boot can turn if it is not tight (this is common on this bike). Be sure to line up the notch on the bottom front intake boot and tighten the front clamp. It is hidden under the crankcase vent hose that runs over the top of the boot.Thanks. Keep updated for any more query. You can rate this
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First how long has she sat up before you got it. If she sat up 6 months or longer you may need to clean the carb(s). The valve you are asking about, is called a petcock, it turns the fuel off/on to the carbs. Turn it off when you leave it setting for a week or longer. If you want to leave it sit a lot longer, crank up the engine and as its running turn off the valve (gas) let her run out so the fuel (gas) does not gum up your Carb.s Now back to why she quits unless the choke is pulled out. What is happining is the choke shuts off some of the air going into the carb.s This forces the gas to be pulled in past any stoped up gumed up vents, ports what have you. So she runs but not great. You can try this. Turn off the tank valve start her up, to run her out of gas. Get your hands on a Turkey baster, some Seafoam (it is a fuel cleaner) Take the line off of the tank valve, force some Seafoam into the carbs with the baster. Let it sit over night. Start her up next day, (get her outside she will smoke up the house). Hook up your tank, put in some freash gas. Do it again if its not any better. If after 2x it does not clear up. You will have to take the carb out and phy. clean it. repost if you need help with that.
if i were you i would put an air cleaner kit on it. the screamin eagle one work fine. any time you open the exhaust you should open the air intake. it sould like you may have an intake leak they are very common.
spray the intake at the cylinder head with brake clean. ifno idle change. their good. if idle changes radically or dies out while spraying... you have an intake leak.
Dave, simplest way to determine that is reading the plugs.... if they are whiteish means its running hot and could use a larger jet .... Have u tried that ?
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