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Message started by KenGLong on 01/16/07 at 19:03:20

Title: Idle problem
Post by KenGLong on 01/16/07 at 19:03:20

The idle on my '02 will sometimes drop really low at stop lights. It starts to lope and I have to goose the throttle to keep it running. It doesn't happen all the time though. Most times, it idles just fine. Seems to happen more when she's cold. High speed runs are fine. I can run at a steady 70 mph no problem. This problem has been around for several months. I was just in my carb and did the rejetting and white spacer mod as well as a thorough cleaning on the bench. This idle problem was there before and is still there after the carb work.

It was so bad after my test run this evening that it stalled in the driveway after I came back and wouldn't start up again. I pushed the bike into the garage where I was finally able to start it after a couple minutes of trying. It acted like it was really really cold. The idle was very low then slowly came up to normal.

The bike has about 21K miles on her. I bought it at 12K in Sep of 05. Any thoughts?

BTW, I went from a 145 main to a 152.5 and a 52.5 pilot to a 55, have the pilot screw set 1 turn out and shaved the white spacer to about .065" (I'm at 5000 ft elevation). The bike has much more power now and there is no more backfiring. Just a bit of snap and crackle on deacceleration.

Ken in Albuquerque

Title: Re: Idle problem
Post by Reelthing on 01/16/07 at 20:15:51

sounds like a rich setup to me - but none the less did you have slide spotless clean when it went back in - no oil, no finger prints, no nothing?

Title: Re: Idle problem
Post by justin_o_guy on 01/16/07 at 21:52:33

OOOPS, I wasn't that picky when I went back together & mine sometimes idles wierd. It will be idling high & I will adj, idle screw, not idle mix, & get it about right. later, sitting at a light, idle will start dropping & just keep dropping till I have to goose it to keep it running. Slide sticking then dropping after it's warmed up? Man, for a single cylinder, that carb is a pain to pull.
Anyway, I handled it & I am sure I let oily stuff get on it. I had no idea it was so picky. Guess I better pull it?

Title: Re: Idle problem
Post by Reelthing on 01/16/07 at 23:11:07

don't need to remove the carb - at least I find it easier to pull the seat and tank - twist the carb a little and go at it

Title: Re: Idle problem
Post by justin_o_guy on 01/16/07 at 23:40:05

I just might do that. Thanks,

Title: Re: Idle problem
Post by sparkett on 01/17/07 at 04:33:03

I just kept the lid off the battery. it has the cone filter mod, so i just push the cone in the air box hole. Take off gas line and tuck between seat and frame, hang throttle on pet thingy and twist out. Not any more tho ;D she is running great with the new carb!

Title: Re: Idle problem
Post by KenGLong on 01/17/07 at 06:27:15

Reelthing wrote:

sounds like a rich setup to me - but none the less did you have slide spotless clean when it went back in - no oil, no finger prints, no nothing?

I did clean it up and smoothed it with fine steel wool but I wasn't working in a sterile operating room and I wasn't that careful before it went back in. I guess I can pull it back out and clean it up again.

I also found a reference on this board to a bad vacuum line between the carb and the fuel petcock. Since this problem first showed up after I started wrenching on the bike, it's very possible that I messed up that vacuum hose by laying the tank on the bench or floor and pinching that hose.

I'll do the hose first then pull the slide and clean it up real good if the new vacuum hose doesn't fix it. I had no idea that slide was so sensitive.

Ken

Title: Re: Idle problem
Post by KenGLong on 01/17/07 at 07:27:23

KenGLong wrote:

fuel petcock

Just want to point out that the bbs software changed that word to petthingy all by itself. I didn't type it!

Ken

Title: Re: Idle problem
Post by Kropatchek on 01/17/07 at 07:31:49

KenGLong wrote:

Just want to point out that the bbs software changed that word to petthingy all by itself. I didn't type it!

Ken

If you must, type "petc0ck" and we all know what you mean ;) ;)

Greetz
Kropatchek ;D

Title: Re: Idle problem
Post by Savage_Rob on 01/17/07 at 07:37:54

Yes. Some other favorites include b1tch and sp00n.

Title: Re: Idle problem
Post by tbalam on 01/17/07 at 15:44:28

KenGLong wrote:

I had a similar problem, that happens intermittenly when its cold. I found that if I turn the petcock to prime that it was taken care of and i switch it to on when i shut her off, to prevent overflow in the bowl.

Title: Re: Idle problem
Post by KenGLong on 01/17/07 at 19:13:04

I replaced the vacuum hose today and took it out for a run. The idle still wants to drop but it didn't actually stall. I let it idle in the garage after a good 2 mile run and the idle dropped and dropped and it almost stalled. Then it started coming back up to normal by itself. After 2 or 3 minutes it was back up to normal. The engine was fully warmed up the whole time and my garage is heated.

Concerning the dirty slide suggestion, I'll pull it out and wipe my fingerprints off of it but I don't think that's the real cause because it was doing it before I got in the carb and the slide was much dirtier when I first pulled it out than when I reinstalled it with my fingerprints on it.

Concerning the fuel petcock thingy thingy, running in the prime position would be a good test but does this bypass the reserve? If I ran out of gas on PRI, would I still be able to switch to RES and keep going?

Thanks,
Ken

Title: Re: Idle problem
Post by Reelthing on 01/17/07 at 19:20:02

prime does bypass the reserve

Title: Re: Idle problem
Post by Reelthing on 01/17/07 at 19:21:06

not sure that was clear - you run out on pri and the tank is bone dry

Title: Re: Idle problem
Post by justin_o_guy on 01/17/07 at 21:23:03

Testing, testing.. I put my gun's hammer on halfcock. I dug ice cream out with a spoon.

Also, that's what mine's doing now. Idle will drop to the point I think it's gonna die, but, if it doesn't, it will crawl back up toward normal.I, too, failed to reinstall the slide without fingerprints. Maybe even had oil on it. What happens if I type pregnant dog?

Title: Re: Idle problem
Post by Reelthing on 01/17/07 at 22:02:10

Don't most oceans contain saltwater?

Title: Re: Idle problem
Post by KenGLong on 01/18/07 at 10:16:21

justin_o_guy wrote:

Testing, testing.. I put my gun's hammer on halfcock. I dug ice cream out with a spoon.

Also, that's what mine is doing now. Idle will drop to the point I think it's gonna die, but, if it doesn't, it will crawl back up toward normal.I, too, failed to reinstall the slide without fingerprints. Maybe even had oil on it. What happens if I type pregnant dog?

Sorry to hear that you're having an idle problem but glad to see I'm not the only one <g>. Sounds like we have the exact same symptom.

Won't be able to work on the bike this afternoon after work but should be able to get to it tomorrow afternoon. "I'm gonna wash that idle right outa my slide!"

Ken

Title: Re: Idle problem
Post by serowbot on 01/18/07 at 12:46:25

To test if petcock is the problem, remove the vacuum line completely, plug off at the petcock and the carb, then run on prime. If this fixes the problem you have a leaky vacuum diaphram in the petcock.
It's an easy test that costs very little in time or money and eliminates one possibility.
best of luck,

Title: Re: Idle problem
Post by barry68v10 on 01/18/07 at 13:45:25

I had similar idle problems and some intermitent WOT problems. Did the petc0ck conversion and problem solved...except for the time I ran stone dry out of gas :-[

Title: Re: Idle problem
Post by KenGLong on 01/19/07 at 16:36:54

serowbot wrote:

justin-o-guy! Heads up!

I did that today and sure enough, that was the problem. It idles great in the PRI position with the vacuum hose removed and the carb port capped off. Now I just have to decide if I want to do the manual mod or buy a new petc0ck. Knowing me, I'd probably always forget to turn it off if I modified it so I'll probably buy a new valve unless I can find a new diaphragm. Ron Ayers has it for $56.

Thanks!

Ken

Title: Re: Idle problem
Post by verslagen1 on 01/19/07 at 18:41:21

Check ebay there's a couple available now.

Also check out the intruder petc0cks, visually looks interchangable but no vacuum on/off.

Title: Re: Idle problem
Post by justin_o_guy on 01/19/07 at 19:04:41

Gee, maybe that will help with my 35 mpg! Woo screamin HOOO, wooden that be cool? It is odd that I have a supertrapp with 8 baffles & running a 150 main & it smells rich & rarely needs the choke. It's also kinda intermittent in its behavior.
I will check this out & if necessary. I will look to repair the petDOOkickey just with stuff I have around.Should that fail, well, I will look here for more help. Thanks all.

And,

Thanks Mr.Long

Title: Re: Idle problem
Post by Bikemom28 on 01/19/07 at 20:03:43

Do you think maybe the air filter is not getting enough air through it. When My husband and I first got my bike to start it had the same Idol problem but it was fixed when we got the make shift air filter in her flowing the correct amount of air. If there is not enough air going through the filter that could cause the bike to stall or maybe to much air. Check that out It might help. I am by far not an expert and this may be real bad advice but maybe it might help.

Title: Re: Idle problem
Post by justin_o_guy on 01/19/07 at 20:11:57

I am still running the original filter, has almost 14,000 miles on it. I have a replacement drop in K&N on the bench, ready to install. I don't thihnk that's the problem. I will look at the PetdoohiCkeyOCK & see what it does, too..

Title: Re: Idle problem
Post by Bikemom28 on 01/19/07 at 20:20:39

verslagen1 wrote:

Check ebay there's a couple available now.

Also check out the intruder petc0cks, visually looks interchangable but no vacuum on/off.

Maybe you have a vacuume leak.

Title: Re: Idle problem
Post by justin_o_guy on 01/19/07 at 20:41:27

You know what? Noiw that you mention that, I have to agree! & how cool would that be? So simple to solve & the $$$ is good from that angle, too. You know why that suddenly makes sense? Cuz I pop the line loose at the carb end & not the PetCorck, so when I pull the takn I am torturing & poinching that line. Now, would a vac leak there make me rich? I am thinking no, but it would make me idle goofy. SOThanks Bikermom, mighta helped me out a bit.

Okay folks, lets say I have a slight leak in that vac line. What will the symptome be?

Okay, I sucked on it & it didn't feel like a solid line. Am I supposed to be able to get any air or is it spose to be like suckin on a glass coke bottle? Or a plugged straw?

Title: Re: Idle problem
Post by KenGLong on 01/19/07 at 21:07:08

Do the test that serowbot described and it will tell you without a doubt if you have a vacuum problem with the hose or the petc0ck. I did it and my idle problem went away completely.

I don't think my '02 has ever idled so well and the choke (enrichener) works like it should now. Before, it used to work sometimes and other times it seemed to do nothing. Same with my idle mixture screw. I always thought it was carb problems but even after overhauling the carb the problems were still there. It took removing the vacuum line from the petc0ck and plugging the port on the carb to expose the real cause.

Ken

Title: Re: Idle problem
Post by Bikemom28 on 01/19/07 at 21:33:09

Your welcome anything to help. That is to what I know. Not much knowlage but I am on a learning curve.

Title: Re: Idle problem
Post by Digger on 01/26/07 at 20:35:43

I did the Serowbot test last summer and it fixed the rich condition my engine was experiencing. I think a bad petc0ck diaphragm was letting fuel into the vacuum line, and thence into the intake manifold.

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