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January 31st, 2010, 01:14 PM   #1
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Brand New 390 dying!! Help

2010 FE 390, 2 days old. Aggressive Map setting, dealer told me they removed something from the muffler to improve power, not sure what that was. Emissions or noise control likely.
2 rides so far. Yesterday, riding gently for break-in period, I noticed it start to hesitate and bog down after an hour of riding. Problem associated with some back-firing. seemed to go away quickly and feel normal after. Problem re-occurred a few times and actually stalled 2-3 times. Started after the stalls no problem and actually felt fine between stalls. I headed home so I wouldn't get stuck in the woods. Problem seemed to go away on the way home (faster riding).
Changed the oil and filters last night.
Rode today and problem much worse. No crazy riding, low speed 1 or 2nd gear woods riding, really taking it easy on the bike still, no hard reving. Problem started an hour into the ride. hesitating, and eventually stalling, more back firing before stall. If I waited a few minutes, would start relatively easily and drive for 30 seconds then stall again. Seemed to ride fine for those 30 seconds then bog down. The longer I went, the worse it got. Eventually the interval between stalls got shorter and shorter. I'm not certain but seems like I could get a longer ride if I waited longer after the stall and let it cool down more. I actually started spraying water on the header to cool it down faster, seemed to help but not absolutely sure.
If the bike is over-heating (not certain that it is) seems unusual to me. Didn't feel particularly hot and it is only 5 degrees Celsius outside (winter in Canada).
Any thoughts? Cooling system? Fuel injection? Fuel filter (is there one on this bike)?
Any help appreciated. I'm hoping this is going to be an easy fix. I'm trying to avoid going to the dealer because it is a 2 hour drive each way.
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January 31st, 2010, 02:42 PM   #2
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Re: Brand New 390 dying!! Help

Any chance there is something blocking the air vent to your gas tank creating a vaccum? Check the hose and valve. If you have one of those one way valves I would toss it. Next time the bike dies quickly unscrew your gas cap and listen for a sucking sound which is an indicator that air is not getting in to the gas tank as you use fuel. I had this happen to me on a KTM and it drove me crazy for a long time until I figured it out.
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January 31st, 2010, 05:52 PM   #3
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Re: Brand New 390 dying!! Help

Thanks Woodsrooster, I'll try that but I doubt it. I unscrewed the gas cap several times today and the bike still stalled after about 30 seconds.

Any other ideas out there?
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January 31st, 2010, 07:39 PM   #4
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Re: Brand New 390 dying!! Help

I just went over a few things.
Fuel line connector snaps solid.
Fuel pump normal
air filter clean
gas tank vent normal, easy flow of air

I noticed my header pipe is golden yellow, not silver stainless like in the manual picture. Is this an indication of overheating? I actually noticed it was yellow like that when I bought it.
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January 31st, 2010, 10:34 PM   #5
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Re: Brand New 390 dying!! Help

If the bike is brandnew like yours I would bring it back to the dealers` workshop to fix the problem or???
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February 1st, 2010, 02:21 AM   #6
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Re: Brand New 390 dying!! Help

check your battery connections
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February 1st, 2010, 08:28 PM   #7
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Re: Brand New 390 dying!! Help

I read that the fuel filter in the tank has a design flaw (ad for filter bag that filters the entire unit). Apparently the mounting bolt hole or locator pin has a ton of clearance allowing unfiltered fuel to get into the pump. Possible cure?

Just got my FE 570 home tonight! I'm in Calgary so studded tires are going on!
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February 1st, 2010, 08:55 PM   #8
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Re: Brand New 390 dying!! Help

You have a 30 day warranty, use it.

For what it's worth...........The last time I saw anything like this, it was a guy in Montana with a new 2009 FE450, the bike would start but as soon as he gave it some gas it would die, or just run for a bit then die. The problem was traced to a hair line crack in the spark plug insulator. They changed the plug and we haven't heard a peep since.
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February 3rd, 2010, 08:07 PM   #9
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Re: Brand New 390 dying!! Help

Is the CA restricted map still in it? The CA map will stall, run real lean so popping happens, etc. Is it also possible that someone turned the idle knob?

ooops...just noticed you are in Canada, i dont know if North America bikes (Canada too) all come in with US or California restricted maps
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February 5th, 2010, 11:02 AM   #10
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Re: Brand New 390 dying!! Help

Thanks for the help. The bike is at the dealer now. dealer was very helpful and concerned, claimed this was the first 2009-2010 he has had returned. Unfortunately, he is unable to connect to the computer. He has 5 390's in stock and non of them are recognized by the Husaberg diagnostics? Husaberg has sent him a few software patches, still not working. !!
Meanwhile I am without bike and still no answer as to why this is happening.
PS. my bike had the newest competition mapping already.
PSS. Spark plug will be a good place to look, i agree. Thanks DaleEO. Would explain how the problem only starts when the engine gets warm.
Will keep you posted.
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