Hey now everybody.
my all stock 04 F is having major problems. When I start the bike for a ride, the bike goes well for about the first 5 mins, but after then, (especially when i decelerate for a light or slow down for a turn) the engines dies completely in a way similar to when you ran out of gas. My question is whether this is fuel line issue or a carb problem ?
How much gas do you have in the tank? Sounds like it is just low.
there should be enough, i sway the tank back and forth and i can hear the gas swoosh around.
Fill it all the way up and try. :thumb:
Your swooshing, it means nothing. It can be completely out of gas, and still have gas in the tank. Put some gas in it.
Hi,
Since a few days, I have exactly the same with my GS500. :o I disconnected the tubes from the valve, gas flew out so no obstructions in the filter or so.
It starts normal, after riding say 2 km, the bike acts like you are out of gas. Starting again is difficult, it needs to be choked again. Then it runs for a short time, and again out of gas.
When it is running again (after it stopped), it is also difficult to get higher rpm. Running idle goes difficult but increasing rpm stops the motor from running sooner.
To me, it looks the gas does not pass a filter or so, when the bike is out of use for a few hours or so, the carberaters are full again... May the the answer is in the question but as explained, gas is flowing through te tubes to the valve, nothing was changed with the tubes, it suddenly started... (or as you like, it stopped... :mad: ).
By the way, I also tried all positions of the valve, including PRI, no difference.
So me be the same problem? (or other clues?)
Thanks in advance,
Chris.
My '94 was having a similar problem too, I cleanned the carburetors and removed the extra fuel filter I added before the bike had this problem.
Now the bike runs fine.
Thanks for the hint.
I will check my bike tomorrow if one of the past owners also added a fuel filter. I assume then it should be between the valve and the carburators, in the tubing. Or I disconnect the tubing from the carburators and see if the fuel will drain (that would also exclude the valve as a potentional cause).
In a Dutch newsgroup, they advised to check if the fueltank gets vacuum, I drove even with open tank and no difference, so that was certainly not the problem/solution...
I just had a brainwave :cookoo:, is it likely the fueltank also contains some water? Would this effect also occur in that case? Then I could empty the tank and put new fuel in? The current fuel level is about the level to switch over to reserve.
Thanks again,
Chris.
To check for water, open the tank and move it around while looking in the bottom. If you see a "blob" in the bottom moving around, it has water.
This can also be caused by the lack of a fuel filter. If trash gets through, it can clog up your pilots jets, causing the bike not to idle.
You need a cellulose (paper element) filter, not a screen filter, which is already in your gas tank, that is made for a low pressure carbureted fuel system. It's bulky, but the Purolator F20011 filter fits the bill. I will let everyone know how well it works.
Today, I checked the fuel tubing, nothing wrong with it. Fuel running smoothly throug them. Blowing air through the tubing that is connected to the caburatur (with my mouth) was no problem, so no obstacle between the valve and the place the fuel should go to.
So I removed the carburaters to clean them. To be honest, I did not disassemble them completely because I am not shure how to remove specific parts and affraid to damage them. The chambers with the fuel did contain a bit rust particles, not really very dirty. I cleaned everything I could see and pressed air through the main nozzle. One of the long needles is worn, the clip washer almost had no grip, the diameter of the needle (upper centometres) is reduced to about half normal size!
Likely tomorrow (or the day after) I will place the carburatur back and see what happens... Before I do it I will check this forum, may be something special should be checked...
By the way, no blobs moving in the tank so no water.
I will keep you informed.
It will be best to replace the needle before you put everything back together because this could be the problem you are having. I recomend using compressed air and carburetor cleanner when cleanning the carbs.
I reassembled everything set the valve in PRI position and start!.... nothing happens...
I pulled off one of the tubes to the valve, fuel came out.
Then I unscrewd the screw that is on the bottom of the carburators... dry, no fuel...
Then I pulled off the tube (at the valve site) that goes to the carburator.... no fuel comming from the valve!
So I disconneted the valve, put my mouth around the two inlets and started to blow, the valbe in different positions.
It seemed to work. Then I unscrewed the four schrews, the spring came out and in all positions it seems to function.
So I wonder why no fuel came out of the valve at the moment all tubing was connected. Tomorrow an other day, I think I will lay the tank on the table, connect the tubing and the valve and see what happens. At least some more space on the table :cheers:
Have nice days, Chris.
Quote from: Motormouse on April 04, 2007, 12:26:42 PM
Hi,
Since a few days, I have exactly the same with my GS500. :o I disconnected the tubes from the valve, gas flew out so no obstructions in the filter or so.
It starts normal, after riding say 2 km, the bike acts like you are out of gas. Starting again is difficult, it needs to be choked again. Then it runs for a short time, and again out of gas.
When it is running again (after it stopped), it is also difficult to get higher rpm. Running idle goes difficult but increasing rpm stops the motor from running sooner.
To me, it looks the gas does not pass a filter or so, when the bike is out of use for a few hours or so, the carberaters are full again... May the the answer is in the question but as explained, gas is flowing through te tubes to the valve, nothing was changed with the tubes, it suddenly started... (or as you like, it stopped... :mad: ).
By the way, I also tried all positions of the valve, including PRI, no difference.
So me be the same problem? (or other clues?)
Thanks in advance,
Chris.
Quote from: Egaeus on April 01, 2007, 06:28:28 PM
Your swooshing, it means nothing. It can be completely out of gas, and still have gas in the tank. Put some gas in it.
[/quote can any one give me a step by step guide to clean or rebuild my 99 gs 500 e carbs
Your Haynes manual can do just that. Clymer kinda' does, but if you don't have one, get a Haynes. If I had a video camera, I would have done it, but the cell phone cam is too limited.
Hi all,
latest status on my bike...
I disconnected the tube to the carburatur (on the valve side), no fuel was comming out (position PRI). I put an additional tube to the vale (vacuum position) and sucked a bit with my mouth, in position RES and NOR fuel came out (almost in my face :cry: ).
To me it means the valve does not function properly. (One issue clear I hope, any comments on this?).
I filled up the carboraturs this way (I checked if the fuel was really in the carburaturs, by removing the screws on the buttum of the carboraturs, I wish I had this idea before (or someone brought me this idea), it can easily be seen if fuel is blocked at the moment the motor stops).
I started, no problem, it ran fine.
I waited (cleaning up the tools around the bike) and suddenly, the motor stopped running. I checked if the carbs were out of fuel, no, still fuel in it. I tried to restart, it didn't work, with full choke on it looks he wanted to try a few hits, result was poor, not running.
Then I tried the hint of the spark, I checked it, indeed it looks a bit poor spark. At least not a 'strong blue spark'. After a few hours, I did the spark check again, to have a reference. Even with one plug connected, the motor started (with one cylinder), the spark on the spare plug was still not a very strong blue one (in my opinion). However, may be this spark looks a bit stronger then when the motor did not run.
Conclusion: may be the fuel line and/or carb have nothing to do with this problem. I do not know why using the choke with a poor spark brings more life then without choke. Can this be explained?
What I also find obvious: if the bobine is defective, is it logical both cilinders stops? When the bike (bobine?) is cold, the bike runs good even on one cilinder...
I appreciate your thoughts, may be I should make a new topic now, related to sparks instead of fuel :icon_razz:
By the way, did Z315 solve the problem? (he had this problem originally posted).
Thanks in advance,
Chris.
It sounds like a fuel problem to me. Even though there is fuel in the carburetor, the level may not be high enough to run the bike. Get some clear tubing (such as fuel line for a string trimmer), attach it to the drain valve, invert the tube, and open the valve. The fuel level should come to the joint between the float bowl and carburetor body.
By bobine, do you mean coil? A coil problem would only affect one cylinder, as there is one coil for each spark plug. It's unlikely that both would have the same problem.
Thanks, indeed 'bobine' should be 'coil'...
It makes logic to me, if one coil is defective, it should still do something on the other cylinder.
I will follow your hint to check the level with a transparent piece of tubing, you will hear the result later.
Chris.
Solved :) (I hope)!
Too embarrassing to mention...
I suspected the petcock, in PRI position it passed fuel on, a few moments later it didn't etc.
So I removed the petcock, connected the tube from the tank directly to the carburetor and started the engine. It ran, and for a rather long time. So I thought it was solved. To ensure I would not run out of fuel during this experiment, I decided to connect the reserve tube to the carburetor. Then I drove around in the neighborhood, and had to push the motor home because the same original problem occurred :mad:.
Now it was clear to me, the problem must be in the tank filter. I disconnected the tube from the carburetor and hang it in a jerrycan, nothing came out! :dunno_white: Then I did the same with the other tube: fuel came out! Now it was clear to me, the past owner changed the two outlets of the tank! That was also the reason the petcock did act strange, in PRI position it should pass the reserve position that was connected to the 'normal' outlet and the fuel level was just about that level...
So what originally happened: likely I had the petcock in reserve position and ran out of fuel. Then I turned the petcock in PRI position, still no fuel. However, while putting the motor on the standard, a bit fuel passed the petcock so it looked time had to do with it... Then I could start again, during driving the fuel 'waved' in the tank so sometimes a bit of fuel, then it stopped.
This evening, I changed the two tubing's from the tank, connected them to the (cleaned) petcock and it seems to work! Tomorrow I will put my tank full with fuel.
What did I learn from this?
This forum is a great help, thanks for everyone who did suggestions,
never rely on something in case of a second hand purchased bike. Trust but verify!
Best regards,
Chris.
Wait, you mean you were out of fuel? Hehe. Yeah, that's happened to me before, except I almost ran out of gas running on ON. We told you that you weren't getting fuel. :icon_mrgreen:
Yeay, that was also my case, because the tubes were switched, RES did not pass fuel, PRI did not pass fuel, only after the motor was running, I could have triwd ON but that would not be logical...
Thanks,
Chris.