I have owned 2 Sportsters. If you do get a new exhaust and air cleaner you don't need to mess with the jets. Just remove the plug covering the air fuel mixture screw and tune the carburetor. You might need to back the screw put a quarter to a half a turn, but that's it. If you start by up sizing your pilot jet you won't get the full potential out of your bike. The 88 needle fixes the carb farts. You want a smooth steady climb in the rpms. If you run it rich you will have a plateau in exceleration and more vibration throughout the bike. This is especially true for rigid mount Sportsters.
Not sure what last owner did but my bike sat for two years when I bought it I cleaned whole carburetor and fixed few things now I’m back firing out my carb and can’t run without choke any idea? Plugs are black to
Don, my 98 xlc 883 is configured as you said, but even at 3.5 turns out it still coughs and stutters at the lowest opening of the throttle. I have to roll into the throttle very intentionally to avoid this cough. I am at a loss
Hi CC I have a Mikuni BS 33 cv carb. on a 1986 Yamaha Maxim x liquid cooled. I can get good idle, soon as I touch the throttle it starts screaming. 5k for a while then tames down to low idle and then shuts off. I turn idle mixture jets closed completely and it stills runs, where is the fuel coming from? Enricher circuit? Round slides don't seem to be moving, at that throttle position, I have aircleaner and air box off to see whats going on. Any help, on this.
I have a 73 cb350 with a cv carb. It seams like its running very rich because when it trying to idle it wont rev unless i take the carburetor off a little bit. To me this leans out the mixture but let me know what you think😊
I changed my camshaft on my evo big twin FLSTN 1993 from Stock to Andrew’s ev13 I replaced intake manifold seals and they are tested and good. My problem is the following, I have a slow jet of 40 but looks bigger than a 42 I adjust the mixture screw counter clockwise 1 1/2 turns but the rpm goes down a little “not optimal mixture? “ I close the screw all the way and the idle speeds up “better mixture?” but here is the catch the throttle response sucks bike spits up and tries to die when applying throttle, when I unscrew and put 1 and 3/4 turns the idle goes a little down but the throttle response is way better can you tell me why is this ? Do I need bigger or smaller jet ? Is it because the size 40 jet perhaps is faulty fuel hole bigger than it should compared to the side holes ?
Any help would be greatly appreciated I have a 83 Suzuki gs550l with the Dual CV carburetors and I am having issue of runaway it idles at cold start up somewhat okay A little choppy but okay but when cold if you give it some throttle it just runs away at 5000 RPM Full Throttle the cable is not sticking, I have adjusted the idle screw in the middle till it wasn't even touching the throttle linkage anymore so it's not that but as it warms up if you start it it just goes straight to 5000 RPM I'm going to double-check a few things this weekend before I take it out and tear it apart but just wanted to see if somebody knew what could cause that in this type of carburetor I was told recently to clean the Jets which I do plan on doing but I just don't think that's it and yes this bike does have a vacuum petcock which one of the things I'm going to check is to make sure everything is tight on the vacuum lines just in case that's it but when it idles real high I can use the choke as a somewhat throttle at half choked it calms somewhat down at close to full choke it dies I've been doing a lot of research over the last week even going through the owner's manual and service manual I bought for this like and I have a few ideas of what it could be but wanted to see if somebody on here have a lot more experience than I do with this type of carburetor oh, I already got a hold of the manufacturer that makes the carburetor and they said Jets as well but to me it's just not making sense why the Jets if they were clogged the bike wouldn't run right or run that high, also each carburetor from the looks of it has two adjusting screws so are those two idle screws because each carburetor has 2 butterfly valve in it so should I treat youth carburetor as two carburetors?
