| Author |
Message |
    
F_skinner
| | Posted on Saturday, February 13, 2010 - 06:12 pm: | 
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I thought for sure this was a vapor lock issue but I can find no where in the hose that it is pinched. Could the (recalled) gas tank vent assembly be bad?
Bike runs fine then about ten miles later it dies (feels like it is starved of fuel). There is plenty of gas in the tank, carb was re-built last summer and I can find no kinks in the line. Any ideas??? Could it be electrical? Is there a way to check that gas tank vent assembly???
TIA
Frank |
Jramsey
| | Posted on Saturday, February 13, 2010 - 07:01 pm: |
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Have you tried blowing thru the vent hose?
I once had that problem on my X1.
Turned out that that when I had the tank off I pinched the vent hose to the frame with a cable tie when reassembling .
Just a thought. |
F_skinner
| | Posted on Saturday, February 13, 2010 - 07:15 pm: |
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Jramsey, thank you for the reply. I thought for sure (after I figured out I had gas in the tank) that it was a pinched hose. I have not had the tank off in a while or changed anything but I will go over it real good tomorrow.
The last time this happened I pinched the vent hose with a tank bag on my 97 S1 (in 1997)... I could find no where that it was pinched today BUT, I did not blow through it...
Some pics for entertainment
On I - 25
I had to push to this exit with no services.
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F_skinner
| | Posted on Saturday, February 13, 2010 - 07:28 pm: |
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I just went out a blew through the vent hose and I can blow air through it. There feels to be a little resistance but not much. |
Sparky
| | Posted on Sunday, February 14, 2010 - 03:34 am: |
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I think what you are experiencing is a sticky tank vent valve when it seems like it's running out of gas after about 10 miles or so. One thing you can do when it starts doing this is to quickly open the gas cap, letting in air to break the vacuum in the tank caused by the carb sucking gas out of the tank.
You'll probably find that the bike runs normally the rest of the day after doing this little exercise. My 98 S3 would do this occasionally, more often it seemed when it was raining. Perhaps the humidity had something to do with sticking the check ball in the tank vent valve, I don't know. |
F_skinner
| | Posted on Sunday, February 14, 2010 - 11:41 am: |
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I wonder if some type of lube will help it? I do not have a spare vent assembly to try it out.
Thanks for all the help. It is a little cold and snow headed out way so I will not be trying it out today.
Frank |
Sportyeric
| | Posted on Tuesday, February 23, 2010 - 01:36 pm: |
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I've found that the design of the fuel filler allows a bit of water in every time you gas up if you've been in the rain. When I first got mine, I couldn't get it to run more than a mile or two before quitting and I thought I was dealing with figuring out the position of the petcock. When I finally tested the line for flow volume by draining through the carb-bowl drain into a large pop bottle, I discovered I couple of tablespoons of water. |
F_skinner
| | Posted on Thursday, April 08, 2010 - 09:25 pm: |
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Well I am a little embarrassed but maybe my stupidity can help someone else.
I drained the fuel tank and found nothing but thought there may be water in tank, refill and go (still stalling). I put a new vent assembly on (still stalling). Thanks Court for the package.
While I had the tank off for the second time I noticed a zip tie just hanging there (it is for the gas line). Once I tied off the gas line no more stalling. It was VAPOR LOCK.... I felt like an idiot.
So there it is, fuel line too close to the head and getting all the heat.
Frank |
Sparky
| | Posted on Friday, April 09, 2010 - 03:12 pm: |
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Glad you found the problem.
For a little more high-tech solution, head down to the local speed shop where they sell thermal protective sleeves designed to insulate fuel lines from engine heat. I put one on my 96 S1 for thermal insulation and the extra physical protection from rubbing on engine parts. |
F_skinner
| | Posted on Monday, April 12, 2010 - 11:12 am: |
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I spoke too soon, after re-routing the fuel line and using the thermal proctor sleeve and it is still Stalling. It stalls at anything over 4K rpm or when I am getting on it pretty good. It also does it with the gas cap not on.
I have the carb off waiting for parts (I thought I had a rebuild kit but do not) in the mean time I will try to find a wiring short. It seems to happen anytime I am over 4K rpm which is leading me to think electrical. I have never had a coil go bad but I will check that as well as plug and plug wires.
Has anyone had this happen (tube frame carbed bike) or can point me in the correct direction.
TIA
Frank |
F_skinner
| | Posted on Monday, April 12, 2010 - 11:17 am: |
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Starts and idles fine. I can run it below 4K with no problem. When it does all the electrics seem to be working fine.
I will also check the ground cable. |
F_skinner
| | Posted on Monday, April 12, 2010 - 07:25 pm: |
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Checked the ground cable, coil and the plug wires plus the coil. Everything looks good. I am thinking it has to be a short somewhere grounding out but I cannot find it.
Would the carb VOES cause this? |
Sparky
| | Posted on Monday, April 12, 2010 - 11:46 pm: |
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What carb are you running, Quicksilver or Keihin? |
F_skinner
| | Posted on Tuesday, April 13, 2010 - 08:20 am: |
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It is a Keihn. I am going to put a new one I have laying around on this Thursday (waiting on a rebuild kit). |
F_skinner
| | Posted on Thursday, April 15, 2010 - 08:59 pm: |
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Sparky, thanks for hanging in there with me. It was the intake manifold gaskets.... Of course I have the fuel line so protected that it will have to be on fire to vapor lock LOL.
It is amazing that I did not notice the gradual lose of power, she runs like a new bike now.... |
S2pengy
| | Posted on Friday, April 16, 2010 - 08:35 am: |
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Frank
On mine I get alot of popping on deceleration/throttle closing which tells me it is time to do the intake seals.. |
F_skinner
| | Posted on Friday, April 16, 2010 - 09:31 am: |
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I had no popping on decel... And I mean none what so ever. I am not really sure if I solved the problem since I only did 30 or 40 miles. Today I will get her on the interstate.
The bike runs totally different, I have alot of low end and it is very quick. Here is a list of what I did.
1. Replaced Rev Limiter
2. Checked Coil
3. Checked plugs and plug wires
4. New intake manifold gaskets
5. longer fuel line routed different
6. Wrapped the fuel line in high temp tape
7. NRHS Backing plate
8. Head vent assembly added
9. Checked and tightened relays
10. re-routed some wires that are for add-on electrics
11. Tried new vent assembly
12. made sure vent hose was not pinched
13. Rebuilt carb
14. re-jetted from 42 to 46 slow jet
It was interesting to see the manifold gaskets. They seemed to be good in the center but cracked on the edges. One of them was split in two. |
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Acts like it is out of gas or vapor lock (1996 S2T)