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Another carb problem I think?

Posted: Sun Apr 10, 2005 7:26 pm
by HarleyRon
Ok, My 85 will only start with starting fluid then I take off and go about 20 feet then abruptly dies and will not restart. I have 2 carbs and I'm having the same problem with both. I have good fuel flow to carb. Air box is there with good filter. I have cleaned both carbs and blown out all passages with compressed air. Choke is also new. Any thoughts??

Posted: Sun Apr 10, 2005 8:21 pm
by vette76
i had this problem and it was the plug.

Posted: Sun Apr 10, 2005 8:50 pm
by HarleyRon
Ok, I have determined that I have clogged idle jet and 100psi air won't blow it out. Guess I'll soak it tonight and try again tommorrow. This could explain the starting issue.?

Posted: Sun Apr 10, 2005 9:44 pm
by burnt_toast
HarleyRon wrote:Ok, I have determined that I have clogged idle jet and 100psi air won't blow it out. Guess I'll soak it tonight and try again tommorrow. This could explain the starting issue.?
this is a pretty weird problem, let us know how it turns out after u soak it.

Posted: Mon Apr 11, 2005 10:38 am
by Sparrow
I'm having the same problem! I was told by the friend I bought it from that the choke will just allow more fuel in while driving it and causes it to flood out and die. He's not sure what allows the gas in, but says I need a new one. I just figured I need a whole new choke. Do I not? Whaddya all think?

Posted: Mon Apr 11, 2005 2:20 pm
by vette76
i would clean the carb first. its worth a shot and it will probably fix it. its not hard as long as u kno what ur doing.

Posted: Mon Apr 11, 2005 10:00 pm
by HarleyRon
Ok, after soaking carb again last night and blowing idle jet with 100psi I cleared the obstruction. I reassemble and it cranked good, ran for 30 or 40 seconds then died like starving for fuel and again trouble restarting. Guess I should go back into carb and clean again. Is anyone running an inline fuel filter?

Posted: Tue Apr 12, 2005 10:58 am
by noiseguy
You should run an inline filter.

For all you guys with Spree that run 40-60 seconds, then die, two things to check:

1) Idle jet needs to be clear! Use a toothpick to clear it if necessary! The choke shuts down after a minute or so, and this may be why it only runs that long. Any idling to that point was just gas getting through the main and choke carb jets.

2) Check to make sure the fuel petcock is working properly. Pull vaccum on the lower line and ensure fuel flow.

These carbs are a b*tch to get to work right. Mine is plugged from sitting over the winter and doing exactly the same thing. I fully expect to find a blocked idle jet. We should probably look for an aftermarket replacement that would bolt up...

Posted: Tue Apr 12, 2005 11:55 am
by mikehailwood
My idle jet clogged two times after my first cleaning (it was definitely clear after the first cleaning) and required additional cleaning of course. I had new fuel and vacuum lines and a new fuel filter. Then a new problem arose which you might want to check on yours. The chamber of the float bowl into which the choke pickup tube submerges is connected to the main float bowl reservoir by a small opening (est. .020"- tiney,jet size). This opening was blocked and no gas could get to the choke pickup tube, so the bike would not start. Theoretically, if this is partially blocked and an insufficient amount of gas is present, it could cause the symtom you describe. It's a long shot, but make sure that passage is clear!

Posted: Tue Apr 12, 2005 10:18 pm
by HarleyRon
Ok, I cleaned the carb yet again. Now my spree will start and run but it idles irratically. Not by just a few hundred rpms but jumps around to sometimes very high rpm and then after a few seconds there will idle good then back high then too low and dies. When the heck??

Posted: Tue Apr 12, 2005 10:22 pm
by vette76
sound like the air screw is not set correctly.

Posted: Tue Apr 12, 2005 10:35 pm
by HarleyRon
I set the air screw at 1 and 7/8 turns out from seated when I was have the irratic idle problem. I did notice the more I screw the air screw in the high the idle reaching highed idle with air screw all the way in.

Posted: Tue Apr 12, 2005 10:38 pm
by HarleyRon
Bad typing on that last post, I will restate:

The idle got higher the further the idle screw was screwed in, reaching its highest idle with the idle screw all the way in.

Posted: Wed Apr 13, 2005 2:11 pm
by vette76
are u sure u didnt adjust the throttle screw? the air screw is the small set in one below the throttle screw.

Posted: Wed Apr 13, 2005 9:38 pm
by HarleyRon
Yes, I'm certain I as to which is the air screw and which is idle screw. Today, I tried to start the spree and I'm back to no start again. Tries to start but not quite as if idle or choke jet is again clogged. I just can't believe this carb is clogged up again. :x