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May 12th, 2015, 11:46 PM   #11
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I Ride: FE 610 oh yea
Power relay up near the steering head might be coming unlatched ?
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May 13th, 2015, 09:25 PM   #12
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Originally Posted by berglsmerg View Post
Power relay up near the steering head might be coming unlatched ?

Do you mean as a result of that loose connection or as something else to check?

No issues on an hour long ride tonight! I want to have the confidence I think these bikes deserve.
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May 14th, 2015, 11:32 PM   #13
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Could be a number of things that make the power relay drop out. The loose wire you indicated in your photo is the feed from the + terminal on the battery, which then supplies the rest of the electrical system via the plug between your thumb and Middle finger. Efi systems need at least a constant 10.5v to operate so given some arcing and fouling, that could be a source of voltage drop right there. Can you describe what happens when the bike cuts out ? Do the auxiliary functions(lights, horn etc) still work ?
Thanks from tourist
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June 27th, 2016, 11:44 PM   #14
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I Ride: FX450 - sold, '08 KTM 690SMR, '12 KTM250SXF (SOLD) 2016 Husky FC250 new race bike!
I'm having a very similar issue on my FX450. It'll cut out, for a few seconds and re-fire (I pull the clutch and coast, and it re-starts without hitting the button)
This scenario typically only happens after the bike is hot, and only when accelerating hard with 3/4-to-full throttle.
Example...raced supermoto a couple weeks ago. Ran two morning practice sessions, and two heat races...no cutting out. After a lunch break, heading out from pre-grid for my first main...the bike cut out briefly. Hmmm...
Then on the start of my main, As I was shifting from 2nd to 3rd, it cut out...with 14 bikes charging hard behind me! YIKES!
I've already replaced the fuel pump and the spark plug cap.
It's so intermittent, and only happens under race conditions...During a track day, when it was acting up, I could short shift and it didn't cut out...once I gave it full throttle, out she went.
Does the pulse coil have two speeds/circuits? I know the ignition coil can create similar issues, but when they fail due to heat, it usually takes a long time for them to cool and work again. Could the regulator/rectifier on these bikes be intermittent? Causing a drop in voltage, thus the EFI cutting out briefly?
I will only have a day or so two fix this thing before my next race, after I return home from a business trip...
Any help would be appreciated.
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August 13th, 2017, 10:10 PM   #15
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Well to bring this old thread back from the dead... to make a long story short, after checking out fuses, wiring, pulse generator ( I was getting the 2 FI blinks for it) I finally swapped to the CA Cycleworks fuel pump I've had laying around and it has run great the last 2 short rides!!

I never thought the fuel pump would cut instantly and refire like mine was doing but fingers crossed it's all good now!!

Thanks for the advice I received here!

Time to ride!
Thanks from jon andersson
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