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Message started by Kris01 on 07/10/17 at 14:53:02

Title: Sticking carb slide?
Post by Kris01 on 07/10/17 at 14:53:02

I still haven't fixed my router problem yet. I'm still locked out of this website at home so bear with me. I'm using a work computer so responses will be slow coming.

The bike starts and runs just fine. No missing or bogging at idle. It won't take any throttle though. If I pull the "choke" out 1 notch it wants to stumble and die, but not always. I switched to a Raptor with no luck fixing the problem. No fuel filter to cause any headaches either.

I took the carb apart thinking it was running rich. At least to my untrained brain it "feels" rich. Maybe it's running lean? The only thing that looks out of place are the wear marks on the slide and the slide bore. Sometimes it feels as if there's too much friction pushing the slide up by hand. Sometimes it feels fine. It does fall back to it's resting position every time though.

Is there a way to clean the slide and lube it? Would it help? I assume the engine would just suck in any lube. Would 1000 grit sandpaper in the slide bore do the trick? Can the bore be polished without causing a rich/lean condition later on? I'm thinking about even polishing it with up and down strokes with aluminum foil. These are just some ideas I've found with Google. I wanted to ask you guys before I did ANYTHING. You guys know more about this bike than Google ever will!

Title: Re: Sticking carb slide?
Post by Kris01 on 07/10/17 at 14:53:25

Another!

Title: Re: Sticking carb slide?
Post by Kris01 on 07/10/17 at 14:53:41

A third one!

Title: Re: Sticking carb slide?
Post by Kris01 on 07/10/17 at 14:53:55

Again!

Title: Re: Sticking carb slide?
Post by Kris01 on 07/10/17 at 14:54:09

Once more!

Title: Re: Sticking carb slide?
Post by Kris01 on 07/10/17 at 14:54:28

Getting to be a habit!

Title: Re: Sticking carb slide?
Post by Kris01 on 07/10/17 at 14:54:44

Number 7!

Title: Re: Sticking carb slide?
Post by Kris01 on 07/10/17 at 14:54:59

Title: Re: Sticking carb slide?
Post by Kris01 on 07/10/17 at 14:55:15

Last one! I promise!

Title: Re: Sticking carb slide?
Post by verslagen1 on 07/10/17 at 15:08:08

09302B317273420 wrote:

The bike starts and runs just fine. No missing or bogging at idle. It won't take any throttle though. If I pull the "choke" out 1 notch it wants to stumble and die, but not always. I switched to a Raptor with no luck fixing the problem. No fuel filter to cause any headaches either.

I took the carb apart thinking it was running rich. At least to my untrained brain it "feels" rich. Maybe it's running lean? The only thing that looks out of place are the wear marks on the slide and the slide bore. Sometimes it feels as if there's too much friction pushing the slide up by hand. Sometimes it feels fine. It does fall back to it's resting position every time though.

You didn't mention what jets you're currently using.
What exhaust/intake?

Those wear marks I have too.
I would limit polishing to the carb body.
You shouldn't have to worry about direction with 1000 paper.
Anything you do to the slide just removes the drylube.

Title: Re: Sticking carb slide?
Post by Kris01 on 07/10/17 at 15:47:53

52.5 pilot, 150 main - It's in my signature to make things easy. ;)

The bike is stock except for a Dyna muffler.

Title: Re: Sticking carb slide?
Post by verslagen1 on 07/10/17 at 18:32:36

What you get with a sticking slide is nothing.
You can open it WFO and nothing happens until it unsticks then whoa nellie.
If it bogs, then you have fuel flow problem.
check the main and pull the needle jet if you can get it out.
only other option is to clean the carb and hope for the best.

Title: Re: Sticking carb slide?
Post by Dave on 07/10/17 at 18:51:20

The only thing I would try on the slide is a spray graphite. It dries and is a slippery surface like the original - although I doubt it lasts as long.

Blaster makes some and you can buy it at Lowe's, Home Depot and similar places.

https://www.lowes.com/pd/Blaster-5-5-oz-Blaster-Graphite-Dry-Lube/50102616

Generally a sticky slide makes the bike run erratic at minor throttle changes.....as it stays stuck in one place until you make big movements of the throttle.

Title: Re: Sticking carb slide?
Post by ohiomoto on 07/10/17 at 20:23:43

I put my slide in once and somehow cocked the spring or pinched the diaphragm. Went to go to work the next day and it would hardly accelerate. Just like you described. I popped the top off and reset the diaphragm and made sure the spring was straight as I put the top back one. Runs perfect.

Check your diaphragm for tears or holes, make sure it's seated properly and carefully compress the spring when you put the top on. With any luck, it will run like it should.

Title: Re: Sticking carb slide?
Post by batman on 07/10/17 at 23:14:55

You told us about your jets and HD muffler,have you done the spacer mod ? you may be running lean in mid throttle (where you spend most of your time ) and the slide is running "dry" that may cause the wear your seeing on the slide (just guessing).

Title: Re: Sticking carb slide?
Post by Kris01 on 07/11/17 at 04:51:51

I'll check those things tonight when I get home and report back. Thanks!

Yes, I've done the spacer with a few washers. I rejetted and did the spacer mod a while ago. It ran great and I haven't changed anything since. All of a sudden it decides to not behave.

Versy, I originally thought it was a fuel problem but I don't see anything obvious that would be the culprit. Nothing looks out of place. The diaphragm was seated properly when I pulled the cap off but I'll double check everything and let you guys know.

Thanks again for the help!

Title: Re: Sticking carb slide?
Post by Gary_in_NJ on 07/11/17 at 05:00:48

Kris,

Check to make sure that your needle isn't binding inside the needle jet. I've seen it happen.

Title: Re: Sticking carb slide?
Post by stewmills on 07/11/17 at 06:57:47

29100B115253620 wrote:

It won't take any throttle though. If I pull the "choke" out 1 notch it wants to stumble and die

Some of the other guys here are better at this than I, but this comment makes me think it is running rich for whatever reason. I too have the marks on my slide, just not as bad. I clean my slide and carb body with WD40 and wipe with a lint free cloth right before installing and that has always served me well.

As another mentioned, what is your white spacer situation? I recently fought an issue at idle - 1/8 and what I though was a lean condition turned out to be a rich condition due to my having taken too much out of the white spacer. These things can be tricky.

a) Tell us what your white spacer set up is? (EDIT: you noted above...you were typing while I was :))
b) What happens if you turn the air/mix screw all of the way in? Does it choke out or stumble noticeably?

Title: Re: Sticking carb slide?
Post by SALB on 07/11/17 at 10:18:33

3B3C3D3B393B203B540 wrote:

I had the exact same thing happen when I did the spacer mod. I think the diaphragm slipped while putting it together.

Title: Re: Sticking carb slide?
Post by norm92de on 07/11/17 at 11:54:27

FWIW, I had the exact same problem as Ohiomoto carefully removing the top sap and replacing it cured my self imposed problem. :)

Title: Re: Sticking carb slide?
Post by ero4444 on 07/11/17 at 15:21:25

if it was rich, then would you not smell the gas in the exhaust? Is the air filter clean?

If it is lean, you did change to Raptor, did you try it on REServe? Blow out or replace the old line? Old gas?

Nobody talks about Seafoam any more. Was that just for Oldfeller or something?

Title: Re: Sticking carb slide?
Post by justin_o_guy2 on 07/11/17 at 17:12:32

I'm sold on seafoam.

Title: Re: Sticking carb slide?
Post by Kris01 on 07/12/17 at 04:48:13

She runs like a champ!

I think the diaphragm swelled a little bit after I sprayed carb cleaner into the carb. That's probably why the slide seemed to have a little friction when I pushed it up and down.

As it turns out, my floats were ever so slightly off. I don't remember the float height right now but mine were too high by about 1/16" or so. Maybe the fuel level was too high in the float bowl putting the gas too close to the fuel pickup causing the carb to gulp fuel instead of sipping it? I don't know.

I bent the tabs on the float and got it adjusted to slightly over 1" height, give or take. I think the specs are between 1" and 1.25" but don't quote me on that. Maybe someone will chime in.

Title: Re: Sticking carb slide?
Post by batman on 07/12/17 at 07:52:23

1.06 to 1.14 inches ,26.95 to 28.95mm(float level)

Title: Re: Sticking carb slide?
Post by Kris01 on 07/13/17 at 04:46:43

Yep, that sounds familiar! Thanks Batman!

Can anyone figure out how the float got out of adjustment all by itself? When I bent the tab back into spec it wasn't easy. It was stiff enough that it should stay in spec virtually forever.

Title: Re: Sticking carb slide?
Post by justin_o_guy2 on 07/13/17 at 06:26:47

Can anyone figure out how the float got out of adjustment all by itself?

That's such a good question.
Of course I would think so, I asked it a few days ago. I don't remember a Really convincing reply. Not sure anyone knows.

Gremlins?

Title: Re: Sticking carb slide?
Post by Gary_in_NJ on 07/13/17 at 07:44:18

655C475D1E1F2E0 wrote:
Can anyone figure out how the float got out of adjustment all by itself?

It probably got knocked out of alignment the last time you removed/installed the float bowl. It's easy to catch the side of the floats with the cover during removal/installation.

Title: Re: Sticking carb slide?
Post by SALB on 07/13/17 at 11:50:17

I wonder how much wear on the needles rubber tip, as well as shrinkage as the rubber ages, affects float level. :-/