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July 13th, 2012, 06:06 PM   #21
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Re: Fuel Pump problem or something else??

Just fix the gas cap (well documented) like you are supposed to and no RIP
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July 20th, 2012, 07:51 AM   #22
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Re: Fuel Pump problem or something else??

any link to the document ?
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August 17th, 2012, 01:40 PM   #23
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Re: Fuel Pump problem or something else??

Another update on my fuel pump and filter replacement....After about 35 hours of riding fuel hose between my CA-Cycleworks pump and the fuel filter ruptured. Bike stopped dead and I spent a couple hours in the woods awaiting rescue. This hose was supplied with the pump and seems to be more heavy duty than the stock hose so I used that instead of the stock hose which seems pretty flimsy. I guess the new hose not like being jammed into the gas tank. A KTM mechanic told me he had a similar problem with a KTM; he tried several different hoses and they all failed. He recommend I replace everything again with the factory pump/filter assembly that come with all the hoses attached.
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August 18th, 2012, 05:15 AM   #24
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Re: Fuel Pump problem or something else??

Holy cow, drussel. You must be pretty fed up. I feel for you, as my 570 tends to vapor lock even though I've insulated the tank and wrapped the midpipe. Okay, you've described two problems now: A mildly persistent backfire on deceleration and a ruptured fuel line. I have some experience with the first problem on my 570, and I have an idea on the second.

I have removed all the emmision control gear from my 570 and replaced the high-packpressure factory muffler with an FMF 4.1 slip-on. Man that woke the bike up, but it did tend to backfire once in a while on abrupt deceleration. I had it at the dealer for the warranty installation of the additional fuel filter, and they saw the muffler and immediatly asked if the bike now tends to backfire. They explained that the much less restrictive aftermarket muffler will cause gasses to run through the engine at a faster rate and cause a lean mixture condition. They offered to install the "performance map" and doggone if that didn't solve the problem.

That's my experience, here are my thoughts. I don't think that there is any way that a fuel pump that is strong enough to rupture the fuel line is producing a lean mixture, so I just don't see how that musclebound fuel pump of yours can be the problem.

Concerning the fuel line, rather than an expensive return to the factory fuel pump I'm thinking that an auto or motorcycle performance shop could readily fabricate a braided stainless steel fuel line for your bike that is rupture-proof. Shouldn't cost much in comparison to a return to the factory parts. Just a thought.
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August 19th, 2012, 11:41 AM   #25
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Re: Fuel Pump problem or something else??

I had a similar issue. The KTM/Husaberg assisted me with an earlier issue after the pipe install. Rode it and decel pop going on. I have an ECU I just installed and dialed in to fine that decel pop. I will let you know how it does. As far as cutting out, I hope I don't get that after 35 miles of riding. Will see as I get out riding more this season.
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October 8th, 2012, 01:21 PM   #26
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Re: Fuel Pump problem or something else??

all symptoms gone. Running strong and wheels just keep on spinning. The ECU on preset map 7 runs great. I'll have to try out the other settings in the future. I know have 200 total miles.
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October 16th, 2012, 07:59 PM   #27
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Re: Fuel Pump problem or something else??

my husa stalled with bad fuel pump at 4 h i used cycle work pump and had no problems after 1000h.
still, I always take care of turning engine off at red lights signals,might help the bike not to melt.
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October 16th, 2012, 08:13 PM   #28
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Re: Fuel Pump problem or something else??

Originally Posted by desertthumperx
all symptoms gone. Running strong and wheels just keep on spinning. The ECU on preset map 7 runs great. I'll have to try out the other settings in the future. I know have 200 total miles.
I bought the ktm map switch with 10 positions but it comes with only 3 features. I need to get some more tuning of maping. should I get the mapping tool or go with power commander. this switch stayed on setting 2 since ever as the noticed showed 2 as agressive setting.
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October 16th, 2012, 09:58 PM   #29
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Re: Fuel Pump problem or something else??

I think for your type, you have it set up for advance timing which is the best selection. As far as getting the software or power commander, that's a different thing. What are you trying to accomplish? I bought the vortex eco with time advance pre mapped already.
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December 1st, 2012, 11:14 AM   #30
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Re: Fuel Pump problem or something else??

Originally Posted by patlalonde
Originally Posted by desertthumperx
all symptoms gone. Running strong and wheels just keep on spinning. The ECU on preset map 7 runs great. I'll have to try out the other settings in the future. I know have 200 total miles.
I bought the ktm map switch with 10 positions but it comes with only 3 features. I need to get some more tuning of maping. should I get the mapping tool or go with power commander. this switch stayed on setting 2 since ever as the noticed showed 2 as agressive setting.
There are no power commanders (software based) for this bike. Only those piggyback units where you can push few buttons on the unit, UST mapping tool or complete standalone ECU's.

I only know two standalone ecu's that are made and work on these bikes. The vortex that comes pre mapped with few different presets that might work for someone, but gets outrageously expensive if you buy the software and hardware usb adaptor and cable to do own mappings and changes. $700 just for ecu, $250 for cable and $550 for software???

Thats $1500 ecu for simple 1-cylinder motor. For $700 you only get a box with few screw buttons to tinker with, dish another $800 and now you can finally access to it and get to use all it's features.

The other ECU what I have is half the price of full Vortex setup, comes with a solid software interface and has some nice built-in features in the ecu. Quickshifter, shift light, launch control limiter, freely adjustable rev limiter, 15x10 resolution maps that should be more than enough for fine tuning injection and ignition timing, rpm, tps or both based mapping 2D, 3D or tab + alot more.

Should be interesting to see how the new ECU works when I get the bike on dyno.
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