02 883, will idle after warm up with a tad more idle screw but then have high rpms. replaced needle, main jet and accelerator pump, adjusted A/F mixture screw to 2.5 out, replaced the #42 pilot with a #45, all with little to no improvement,,will a #48 be too large?, if not, what is the adjustment procedure, should I back off the idle screw and/or the A/F mixture with the #48 if it coughs with new pilot screw..
(gutted stock pipes and K&N are the only mods to bike.)

 

I just installed a jet kit on my 883. I think I went from a 42 pilot to a 45, and a 65 main jet to a 70. The instructions were basically :


1. Turn idle speed in about 2 turns until you get a fast idle.
2. Turn mixture screw in until it seats (gently). The engine should not die, if it does, raise idle another turn. (mine did not die).
3. Turn idle speed screw out (counterclockwise) until engine is stumbling or dies. (mine was barely running) Idle speed is now set.
4. Turn mixture screw out 2 full turns, restart bike and let it stabilize.
5. Then you use your ear, turning the mixture screw in until the engine speed decreases, out until it decreases and then adjust the screw to the middle. I just turned it in until the engine speed decreased and then backed it out a half turn or so.


This worked for me. Of course it's a little difficult with the engine hot and air filter on. I put a little dab of paint on the screwdriver handle so I could tell how many turns I had gone. I read where if the idle is too low insufficient oil will be pumped, so it's a line between oil pressure and too high of an idle so your clutch and gearbox don't take punishment.

 

Sounds like you are close. Are you making all adjustments when the engine is at full operating temp?

 

1. thanks for the info, and 2. I Do adj with engine warmed up, I have figured out how to keep the bike running when engine is cool but would like to be able to crank it and not have to feather the throttle to keep from stalling out, even when I stop for a ten minute burger or just a fill up it has to be feathered,,,dont think it's supposed to act this way, seems to be fuel starvation related,,,hope the #48 is the fix...

 

Yes warm the bike up before setting the idle,if you set it cool when it warms up the bike will idle to high.
Your choke (enricher) will keep your rpm up if the bike is a little cool like if you stop for a burger,just push it in after the bike warms up,when i first start mine i haul the choke the whole way out tell it starts ,then halfway for a minute or so then push it in and set the throttle with the starr wheel to about 1300 and drop my left hand down and feel the fins on the rear cylinder until they get warm,after a few times you will know the temp the bike likes.

 

48 pilot is way too big for an 883. What do your spark plugs look like?

John

 

thats what I'm thinking too John, plugs have less than 100 miles on em, so hard to read em just yet, but after replacing the original #42 with a 45 and it still wants to die at idle, gonna spend the $4 on #48 and prove to myself I have some tweaking yet to do with the #45,,,,and just live with it's cold/warm start up quirk....runs fine otherwise,,,,,