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Vapor lock on 2010 390??

My 2c on EFI

disable all the unescesary sensors like the tip over switch I wasted 3 hours one day becasue of this stupid (safety) idea thats enough for me, tip over sensor on a dirtbike belongs in the bin.

if you have model specific issues with the pump and a supply problem of the oem part look into sourcing an external generic roadbike EFI fuel pump and bypass the stock one.

Ive seen a lot of efi dirtbikes with failing pumps and I believe it is in part due to dirt in the fuel either in the jerrycans, getting in when refueling in dunes for example or just in the fuel to start with.

having an external fuel pump lets you plumb in a real fuel filter before the pump.

never done this on a berg but im sure you guys get the gist of it.
 
Well I'm taking mine back to the dealer this Saturday and leaving it until it's fixed. The fuel pump is backordered until Nov 10th. So I'm out of commission for at least a month.
 
So, who's going to be the guinea pig and try to cram an external fuel pump somewhere on the bike, spend 4x more than is neccesary working out all the kinks, and then tell the rest of us how to do it for cheap? I call "not it" and volunteer bushmechanic since it was his idea and all. :bounce3:
 
jlew said:
So, who's going to be the guinea pig and try to cram an external fuel pump somewhere on the bike, spend 4x more than is neccesary working out all the kinks, and then tell the rest of us how to do it for cheap? I call "not it" and volunteer bushmechanic since it was his idea and all. :bounce3:
Click to expand...
Bushie does not have an EFI Husaberg. Good idea he has though.
 
Hi guys. My 2010 FE 310 has about 22 hrs on it now and started doing it with about 15 hrs. Runs fine, then after about an hour with lots of 1st & 2nd gear stuff, you stop to catch and such, and then it won't start again for like 15 min. Turns over, just won't get gas. Cools & then runs fine all day. Running Colorado singletrack up over 7k feet most often.

Checked all filters, wires, installed heat shield, check valve out, ball in cap out, rad fan, yada, yada, yada. Seems to be getting worse and happens more often as the hours on the bike go up.

Dealer has it now and they were actually able to replicate it (I know, this never happens!). They are testing some more things and replacing filters, next will be the fuel pump. They are almost certain it is the pump.

So, we'll see and I 'll keep y'all posted!
 
The guys up at Elite KTM in Loveland where I bought it from. They are still working it out, so I will see what is up next week. They said they had some 690's with fuel pump issues and as far as they know it is the same pump in these FE 390's.
 
Barshoe said:
All sign's point to the fuel pump! Fix it KTM! Make Husaberg whole again.
Click to expand...
That's really starting to look like the issue, isn't it? And that when it starts to fail ... that it just get's worse and worse over time.

*Hopefully* KTM/Husaberg is getting a better fuel pump ... that can be refitted to older models!

hopehopehope.... E-Ticket
 
Mine started at 2 hrs and progressively got worse. Eventually it would not start at all. Which is good I think as I don't have to worry about them duplicating the heat scenario before replacing the fuel pump. If it's dead, there's not much trouble shooting involved.

The parts guys saying that they won't have one until Nov 10th but they had 5 sitting on the showroom floor. The salesman says that they could probably swap out one with a floor model. We'll see.
 
Spoke to the service guy yesterday and the pump is indeed dead. He say a new one has already been shipped and should be here today or tomorrow.
 
So, at least one, maybe more, instances of fuel delivery problems related to heat have been traced to the fuel pump.

I don't understand how the fuel pump, which IIRC is immersed in gasoline, can have heat problems. Yes, the fuel gets warm, but not hot. :?:
 
Could it be that it is under rated for the job it is being asked to do. If the motor the pump uses is not heavy duty enough it could be over heating just trying to do its job.
 
CodeMonkey said:
So, at least one, maybe more, instances of fuel delivery problems related to heat have been traced to the fuel pump.

I don't understand how the fuel pump, which IIRC is immersed in gasoline, can have heat problems. Yes, the fuel gets warm, but not hot. :?:
Click to expand...
The gas gets hot enought to boil and bubble ... which is more than warm. Plus, as the gas level get's low, it could be exposed by fuel sloshing around ... or just having the fuel pump exposed as the overall level drops.

And if the fuel pump was "designed" to run at a cool fuel temperarture -- a big heat increase could cause issuses.
Especially if the fuel pump is marginal to begin with.
 
Boil? I've not seen that. Hissing/"bubbling" from the vent hose, sure.

Anyway, not saying it isn't the fuel pump - if it is dead it is dead. Just trying to get to the root cause (besides a general bias against things made in China which doesn't mean much) as I think these failures are the exception to the rule - i.e., not everybody, or even a majority, are experiencing these failures. Could be quality problems, or design problems.
 
CodeMonkey said:
Boil? I've not seen that. Hissing/"bubbling" from the vent hose, sure.

Anyway, not saying it isn't the fuel pump - if it is dead it is dead. Just trying to get to the root cause (besides a general bias against things made in China which doesn't mean much) as I think these failures are the exception to the rule - i.e., not everybody, or even a majority, are experiencing these failures. Could be quality problems, or design problems.
Click to expand...
The other thing about parts failures ... is that it could be a *very* specific run of parts. As in, only peeps that bought X bikes during Y period got the bad parts - and everyone else is fine.

Yamaha had a bad run of heat-treating on cams a couple of years ago - and it was isolated to only a couple of hundred bikes. Everyone else was just fine.

So, it can be hard to tell, eh.
 
A prominent poster on advrider reported this same problem with his 450 but found that once he got all of the ethanol mixed fuel out of his bikes system his symptoms went away. Something to consider. I do know that the lubricity of ethanol is very low so that could be part of what is causing these pumps to fail/have issues.

As for me I've been running a couple ounces of Marvel Mystery Oil per tank, more as a top end lubricant but it would also help the fuel pump.
 
crit rat said:
A prominent poster on advrider reported this same problem with his 450 but found that once he got all of the ethanol mixed fuel out of his bikes system his symptoms went away. Something to consider. I do know that the lubricity of ethanol is very low so that could be part of what is causing these pumps to fail/have issues.

As for me I've been running a couple ounces of Marvel Mystery Oil per tank, more as a top end lubricant but it would also help the fuel pump.
Click to expand...
Good point! I have been aware of the "junk" buildup of the ethanol fuels if they sit too long - but hadn't considered the lubricity angle. Hmmm....

The only problem is that ethanol fuels, especially the 10% version, are becoming more and more prevelant everywhere. Argghh! - ET
 
E-Ticket said:
The only problem is that ethanol fuels, especially the 10% version, are becoming more and more prevelant everywhere. Argghh! - ET
Click to expand...


I know! It's pretty much impossible to find ethanol free fuel here in Colorado. BTW, my 4runner runs better with a bit of Marvel in it as well which is what got me using it in the 570.

Site for finding corn free fuel http://pure-gas.org/
 

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