2011 fs 570. 948 miles, original owner. I took my bike to work today and on the way home I had to stop at the local motorcycle shop to get some stuff for my son's kx100. Bike seemed to be running fine. After getting some stuff in the shop I got on the bike and hit the button. It briefly fired up and stalled. It absolutely refused to start. It has spark and the starter seems to be working fine. I can feel the fuel pump actuate with the seat off. Checked fuses and everything seemed okay. Two nice young guys at the shop took me and my bike home. What could it be?
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As it briefly started up and you still have a spark I would start at the fuel delivery.
Maybe the pressure in the hose fed the injector enough to start it briefly but then when the pressure was gone it stalled. You can hear the pump priming but check the fuel pressure and try to see if the injector is spraying properly?
Maybe the pressure in the hose fed the injector enough to start it briefly but then when the pressure was gone it stalled. You can hear the pump priming but check the fuel pressure and try to see if the injector is spraying properly?
I am having similar problems on my 2010 FE390. It was running fine, then I started to have fuel delivery issues and backfiring. I thought it was the fuel map, but all three of the ignition maps gave me the same result. I tested the fuel pump, and I could hear it prime when I tapped the starter button. I decided to pull the tank and check the fuel filter and fuel pump screen. The fuel pump screen was clean, but the fuel filter was filthy and a lot of sediment came out of it. I figured this was causing the fueling issues, so I replaced it.
After putting everything back together, I am still having fueling issues. I can start the bike and it will idle, but if I give any throttle at all it will stall. I am thinking that the issue may be in the fuel injector itself, but I don't know.
I am looking forward to someone weighing in on this, because I am stuck right now.
Regards,
Dave
After putting everything back together, I am still having fueling issues. I can start the bike and it will idle, but if I give any throttle at all it will stall. I am thinking that the issue may be in the fuel injector itself, but I don't know.
I am looking forward to someone weighing in on this, because I am stuck right now.
Regards,
Dave
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davesmyth, it could be that the injector is partially clogged as your fuel filter had been really filthy. Remove injector and clean it. If the problem is still there see if you can borrow a friends injector to check. The injectors can get bad and a new one is needed. My friend had to buy a new one.
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There should be info on this forum but I think no pictures. I'm not home either so I can't take any. But it's not difficult.
In short:
Remove tank
- Remove seat
- Remove air filter
- Remove plastics
- Remove the black frame connecting the tank, metal frame and sub frame (6 x torques)
- Remove on bolt from the subframe and tilt it a bit backwards (not really needed but makes it easier)
- Remove bolt on top of tank (front of airbox)
- Disconnect fuel hose quick disconnect
- Disconnect fuel pump cable (behind airbox)
- Remove tank and disconnect fuel level indicator cable
Remove airbox
Now you will see the plastic piece that holds down the injector, the one the fuel hose is connected to.
- Remove the cable to the injector
- Remove the two phillips screws on top
- Remove injector assembly and pull out the injector
If you struggle with the two phillips screws you can loosen the throttle body to get a better angle.
Assembly is the other way around.
Ask if you get stuck
A tip: The two phillips screws holding the injector assy will over time become bad and it will be more difficult to remove them as it's difficult to get a phillips screw driver in at the correct angle. The two screw holding the plastic side cover on the throttle body have the same dimensions but are allen heads! Put the phillips there and use the allen screws on the injector. Then it will be easier and they will not be damaged.
In short:
Remove tank
- Remove seat
- Remove air filter
- Remove plastics
- Remove the black frame connecting the tank, metal frame and sub frame (6 x torques)
- Remove on bolt from the subframe and tilt it a bit backwards (not really needed but makes it easier)
- Remove bolt on top of tank (front of airbox)
- Disconnect fuel hose quick disconnect
- Disconnect fuel pump cable (behind airbox)
- Remove tank and disconnect fuel level indicator cable
Remove airbox
Now you will see the plastic piece that holds down the injector, the one the fuel hose is connected to.
- Remove the cable to the injector
- Remove the two phillips screws on top
- Remove injector assembly and pull out the injector
If you struggle with the two phillips screws you can loosen the throttle body to get a better angle.
Assembly is the other way around.
Ask if you get stuck
A tip: The two phillips screws holding the injector assy will over time become bad and it will be more difficult to remove them as it's difficult to get a phillips screw driver in at the correct angle. The two screw holding the plastic side cover on the throttle body have the same dimensions but are allen heads! Put the phillips there and use the allen screws on the injector. Then it will be easier and they will not be damaged.
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No need to order a new injector assembly.
Don't even order a new injector. Not yet.
Remove it and clean it first. After you test it when it's clean, if it's still not good you could try a new one.
When you have the injector out connect it to a normal small 9V battery. That will open it fully and then you can blow air pressure against the normal flow direction. That alone could help. You can also let it soak some time in injector cleaner first to dissolve **** first. If you have an ultrasonic cleaner you could use that one too.
If you feel for it you could connect everything together when everything are removed. I mean connect the cables to tank and injector and connect the injector assy to the fuel hose. If you press the starter button you will see the spray from the injector. That could give you a hint if it's dirty or not. After you cleaned it you could do that same test again and see if you see any improvements.
But the only way to know for sure is to put it all together and start the engine.
Another small tip is to wet the orange o-ring on the injector with WD40 or similar when you push it back into the assy. If you do it without it's a lot of friction and you might damage that o-ring. It happened to me.
Don't even order a new injector. Not yet.
Remove it and clean it first. After you test it when it's clean, if it's still not good you could try a new one.
When you have the injector out connect it to a normal small 9V battery. That will open it fully and then you can blow air pressure against the normal flow direction. That alone could help. You can also let it soak some time in injector cleaner first to dissolve **** first. If you have an ultrasonic cleaner you could use that one too.
If you feel for it you could connect everything together when everything are removed. I mean connect the cables to tank and injector and connect the injector assy to the fuel hose. If you press the starter button you will see the spray from the injector. That could give you a hint if it's dirty or not. After you cleaned it you could do that same test again and see if you see any improvements.
But the only way to know for sure is to put it all together and start the engine.
Another small tip is to wet the orange o-ring on the injector with WD40 or similar when you push it back into the assy. If you do it without it's a lot of friction and you might damage that o-ring. It happened to me.
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Have you replaced the fuel pump? 09-11s are notorious for them being bad.
I'm afraid I'm going to get a reputation for lurking around FS570 threads and posting the same comment, over and over and over...
However.... have you checked if your bike has the emissions control system?
If your symptoms are;
Then it could be the problem I had... rip all that crap off, put a breather on the tank, job done.
If your bike doesn't start after sitting for an hour, then back to Jon's suggestions about injectors and pumps etc :cry:
Cheers
However.... have you checked if your bike has the emissions control system?
If your symptoms are;
- Bike runs great
- Stop for a bit
- Bike turns over but wont start
- Wait ages (or disconnect the fuel line and reconnect)
- Bike starts
Then it could be the problem I had... rip all that crap off, put a breather on the tank, job done.
If your bike doesn't start after sitting for an hour, then back to Jon's suggestions about injectors and pumps etc :cry:
Cheers
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It's high probably to be the fuel pump. But to clean the injector is free, so why not rule out the things that doesn't cost anything first?
My friend had the same problems and bought a new pump and it turned out to be a dirty injector. At least we got a spare pump.
My friend had the same problems and bought a new pump and it turned out to be a dirty injector. At least we got a spare pump.
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Stock fuel pump? They were bad from the factory....replacements covered under warranty. Mine failed at 900 miles...
I replaced the fuel injector and that seemed to do the trick. I also tried replacing the spark plug and adjusting the air/ fuel mixture knob, but those things didn't work. Fuel injector was easy to replace; however the new spec KTM fuel injector comes with an inline filter that was not on my original Husaberg fuel injector. It goes in the fuel hose, so make sure you have the correct pliers to replace the clamp.
Right now I'm fine tuning the fuel/ air mixture. I have heard many people say that 13-14 clicks right from full stop to the left is ideal; however that is way too lean for my bike. May have to do with the KTM racing pipe on the bike. My bike seems to like 7 clicks right from full stop to the left. I'm trying to find the sweet spot. Must ride more!
Right now I'm fine tuning the fuel/ air mixture. I have heard many people say that 13-14 clicks right from full stop to the left is ideal; however that is way too lean for my bike. May have to do with the KTM racing pipe on the bike. My bike seems to like 7 clicks right from full stop to the left. I'm trying to find the sweet spot. Must ride more!
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