Author Topic: grrr bog down then dies on highway SOLVED!  (Read 17256 times)

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Offline scottly

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Re: grrr bog down then dies on highway
« Reply #25 on: May 10, 2010, 12:50:24 AM »
Are the vent/drain/overflow tubes clear?
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #26 on: May 10, 2010, 01:02:17 AM »
sure are, I was confused about how it worked on the inside... heh sorry bout that, but ya I can see light through, blow through and put an e guitar string through
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Offline scottly

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Re: grrr bog down then dies on highway
« Reply #27 on: May 10, 2010, 01:09:57 AM »
Good. Also, make sure the drain passages are open: crack open the drain screws, plug the end of the overflow tube that sticks up into the bowl with your finger, and blow into the drain tube that hangs out the bottom off the bowl. Air should flow freely.   
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #28 on: May 10, 2010, 01:16:48 AM »
I dont think thats how my bowls work... here are some pics. the screw only is in or out all the way. it has nothing to do with that tube...
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Offline scottly

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Re: grrr bog down then dies on highway
« Reply #29 on: May 10, 2010, 01:20:29 AM »
Is there a hole next to, and below the tube inside the bowl? Perpendicular to the tube?
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #30 on: May 10, 2010, 01:24:07 AM »
nope. I am pretty sure it is not the vent/drain tube, thanks for helping me though checking it though. good to know its clear. any other ideas? I'm glad someone else is up at this hour haha. any answers to my questions a few posts back?
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Offline scottly

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Re: grrr bog down then dies on highway
« Reply #31 on: May 10, 2010, 01:39:27 AM »
n I'm glad someone else is up at this hour haha.
Yeah, WAYYY past my bedtime. :D
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #32 on: May 10, 2010, 01:46:12 AM »
haha, and I'm in FLORIDA. almost 5am here. anyways, just had an idea, even though they are pretty new, I have in line filters, could be the problem?
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Offline Brian G

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Re: grrr bog down then dies on highway
« Reply #33 on: May 10, 2010, 01:47:35 AM »
n I'm glad someone else is up at this hour haha.
Yeah, WAYYY past my bedtime. :D

Maybe I'll Have a crack at it from North Africa then (here at work ;D) You still up, Ayrity?

I keep wondering why she reuns well for 20 minutes when cold. Carb jets don't change significantly with engine heat and any other carburator problem might make the engine run badly but it should still run.

I've got to go with the coil idea - or somewhere in the Dyna system - I have no clue how that particular system works. I think you can take your coils to an auto-electric shop and they can test them. It seems I've read of similar problems on other forums - and possibly this one as well - where it came down to coil breakdown after they get hot. If you're getting fuel into the cylinders, it has to be lack of spark....

Hth,
Brian
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Offline scottly

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Re: grrr bog down then dies on highway
« Reply #34 on: May 10, 2010, 01:50:44 AM »
Probably not; you did verify fuel is being delivered by pulling out the drain screws. May well be back to ignition.....
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Offline scottly

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Re: grrr bog down then dies on highway
« Reply #35 on: May 10, 2010, 01:55:31 AM »
Brian, my bro-in-law is currently somewhere in Africa on oil business. Any chance you are there for the same reason?
(sorry for the thread-jack, Ayrity)
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #36 on: May 10, 2010, 01:56:05 AM »
Oh I am still up, always up haha. help from all over the world. love it. What do new coils tend to cost? and it is weird because I would think that would make only 2 cylinders stop working well, but the whole bike dies.
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Offline scottly

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Re: grrr bog down then dies on highway
« Reply #37 on: May 10, 2010, 02:03:58 AM »
Oh I am still up, always up haha. help from all over the world. love it.

Yeah, that's what I love about this forum. It's international! Great mix of cultures and language.

 What do new coils tend to cost? and it is weird because I would think that would make only 2 cylinders stop working well, but the whole bike dies.
I'm guessing it's not the coils themselves, but something with the Dyna system; I admit to ignorance on this subject.....
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #38 on: May 10, 2010, 02:05:40 AM »
gotcha, ugh, maybe its worth it to have a mech hunt down the electrical stuff, it is not fun, or my specialty... great, get to put the carbs back together and back on now lol
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Offline scottly

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Re: grrr bog down then dies on highway
« Reply #39 on: May 10, 2010, 02:09:10 AM »
You don't happen to have the stock parts,(point plate, etc) do you? The old-school stuff is simple and effective.
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #40 on: May 10, 2010, 02:14:18 AM »
no I dont :( anyone have an extra they wanna throw my way? haha. Really think it could be the problem since the plugs dont look sooty? Edit: OK time for bed... please keep the ideas coming guys! I am going to pick up 2 new in line fuel filters tomorrow and re-install my carbs when I get up. I guess we are back to basics here, fuel flow and ignition. Remember plugs (the outside 2 anyways) look nice and tan. Ill post pictures, but for some reason they are out of focus... camera seemed to like my fingers better.
« Last Edit: May 10, 2010, 02:36:03 AM by Ayrity »
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #41 on: May 10, 2010, 02:57:10 AM »
one more sleepy thought, if it is the ignition, do I have coils (those are the same thing as condensers right?) with my dyna ignition? and if so, what resistance do I need to order? still think its probably fuel since it seems to run great on all 4 then the bike gurgles down till it dies.
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #42 on: May 10, 2010, 12:20:44 PM »
ok, carbs back on... with new filters. gonna take it for a ride. any help on the dyna ignition?
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Offline Spanner 1

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Re: grrr bog down then dies on highway
« Reply #43 on: May 10, 2010, 12:29:23 PM »
Hope it's fix'd.... but if not, I think it's time to take the petcock apart and clean it and try running without the in-line fuel filter...
If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....

Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #44 on: May 10, 2010, 12:46:38 PM »
ya, I have rebuilt the petcock before myself, not a huge deal, other than I just filled up the tank ugh. But again, I checked the flow from the petcock directly, it looked good... I'm gonna try with new in line filters, or maybe i should try with new straight through gas line?
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Offline manjisann

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Re: grrr bog down then dies on highway
« Reply #45 on: May 10, 2010, 01:06:40 PM »
The thing in the right side housing that is being referred to as a Dyna (I assume as in the Dynacoil aftermarket electronic ignition thingies) isn't necissarily that. I have a 1980 cb650 custom and it has that same plate setup. They are sealed pickups, does the same thing as the coils but just electronically (I think.) What I'm getting at is they may not be aftermarket but actually stock.

When the bike just up and dies are all the exaust pipes the same temp (as in, if you touch them for more than an instant you'll cook your fingers?) The way I finally started realize mine was partly coil induced was because only 2 of my pipes were toasty while the other two were luke warm (I think I explained that in my original post, I'll go back and read it and see if I didn't.)

Do you have the manual for this bike, the Clymer? It will explain how to set and gap the pickups (the dyna plate thingy).

You can take it to a local mechanic, but in all honesty, if you are willing to do some testing yourself and are reasonably adept with tools (u removed the plugs so you are adept  ;) ) and have some patience you can figure this out yourself and learn more about how your bike works in the process. It's your choice though.

I have to get back to work, but I'll pop back in and toss a few more suggestions on the fire for you.

Brandon
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #46 on: May 10, 2010, 01:10:01 PM »
The manual I have has the classic points system in it, not my ignition set up. All 4 pipes feel very hot, that's why I was thinking it was fuel delivery from the tank somehow. because if it was a float or jet carb problem, it would only be one or 2 of the cylinders.
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Offline Mdub

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Re: grrr bog down then dies on highway
« Reply #47 on: May 10, 2010, 03:22:48 PM »
So the bike was running beautifully. I cleaned the pod filters really well and oiled them, not too much, re-installed. I also just got my side covers from maier, put those on. That is all that has changed since it was running well. Before I did those things, I could ride for hours easily. Now I run for about 20 mins or so and it bogs down at highway speed and gurgles slower and slower then dies if the clutch is put in.

You said the bike was running well. For more than a season with pods?
The mixture changes with air temp.
Perhaps the changing season/temps have put your mixture outside of the envelope that the motor can tolerate?

The reason I ask is that pods flow air much more freely than an airbox.
As a result jetting for the airbox will be too lean for pods.
You also said you let it cool, was it hot? Like did you here it going "tink tink" as it was cooling off?

Everything I've heard indicates overheating. Overheating can cause a runaway lean condition. I'm more familiar with the 750 however,
assuming the #100 jets are stock for the airbox I would think they would be too lean for pods.

Do you get a nice blue spark? A weak spark can really make it tough to diagnose plugs/mixture. If not, try unscrewing the plug caps and cut 1/4' or so off the ends of the wires and reinstall. Be sure to mark how deep the wires are in the caps and then remark them after they're cut so you can tell when they're screwed all the way back in. That can be tricky as the wires don't really want to turn in the cap.

Try running with the choke slightly on and see if it improves.
If it does, you're lean.
Good luck keep at it and let us know what you find out.
Mike
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #48 on: May 10, 2010, 05:51:50 PM »
Update: took it for a ride after reinstalling the carbs. cleaned out the gas tank with seafoam, then rinsed with gas. And ran new fuel lines without filters and rode without air filters. Same exact problem is happening. Ya it was running really well till like, last week. my manual says 100's are stock, but it ran great with them and pods before... should I put new jets in?
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Offline Ayrity

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Re: grrr bog down then dies on highway
« Reply #49 on: May 10, 2010, 06:15:56 PM »
oh and to all the dyna guys, or anyone who knows, do I still have coils with the dyna? are they expensive and what resistance should they be for a cb550? if they are cheap, might as well replace them
1976 Honda CB550k