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  • 2 Post By jon andersson
  • 2 Post By jon andersson
  • 2 Post By TomTom
  • 1 Post By husabutt
  • 3 Post By kfralick73
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November 26th, 2017, 03:29 PM   #1
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Joined: Feb 2014
From: Quesnel bc canada

Posts: 5
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I Ride: 2011 fx 450. 2017 fc 450
11 fx 450 backfires

The bike backfires steadily and heats up quickly. Header pipe orange after 20 seconds.
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November 26th, 2017, 09:59 PM   #2
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Joined: Nov 2011
From: Nordic countries

Posts: 955
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I Ride: Two FE570 -12
Lean mix?

- Check TPS settings
- Remove or change inline 10 micron filter
- Clean injector

You can find info about it all in this forum.
Thanks from kfralick73 and Smash101
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November 27th, 2017, 09:03 AM   #3
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Joined: Feb 2014
From: Quesnel bc canada

Posts: 5
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I Ride: 2011 fx 450. 2017 fc 450
Thanks. I did both filters and cleaned injector. Will try tps. Problem started with stalling and slowly got worse. First thought was filter and injector.
Could it be a timing issue.
How hard is it to check timing.

Last edited by kfralick73; November 27th, 2017 at 12:44 PM.
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November 27th, 2017, 01:27 PM   #4
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Joined: Nov 2011
From: Nordic countries

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I Ride: Two FE570 -12
Who knows, maybe? But the probability of that is so much lower than the TPS sensor knocked out of position (quite easy). Ignition timing is set in the ECU, the sensor shouldn't move that easy, and can wrong timing heat up the header like that?
No answers from me, just words.... But check TPS first and if that wasn't the problem hopefully more cunning people can help you find the problem
Thanks from kfralick73 and Smash101
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November 28th, 2017, 04:21 PM   #5
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From: NY

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I Ride: 2010 FX450 2011 KTM 250XC
Look at night for arching from the spark plug boot to the engine.
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November 29th, 2017, 06:53 AM   #6
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Joined: Feb 2014
From: Quesnel bc canada

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I Ride: 2011 fx 450. 2017 fc 450
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November 29th, 2017, 08:50 AM   #7
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Joined: Nov 2012
From: Sweden

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I Ride: HB 570 FE
If you get a flower spray can and fill it with fuel you can spray down the intake and see if it stops glowing as quickly, if it changes its likely fuel related. Just a thought.
Thanks from tourist and kfralick73
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November 29th, 2017, 10:59 AM   #8
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From: Escondido, Ca. USA

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I Ride: 2005 Fe450,2001 Fx470,1997 Fx600
How many hours on the bike?
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November 30th, 2017, 01:07 PM   #9
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From: Quesnel bc canada

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I Ride: 2011 fx 450. 2017 fc 450
90-100 hrs. Going to work on it this afternoon.
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November 30th, 2017, 03:36 PM   #10
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Joined: Feb 2014
From: Quesnel bc canada

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I Ride: 2011 fx 450. 2017 fc 450
Thanks guys. Got it. The injector wasn't working properly. I borrowed one from a friend runs good with his.
Thanks from jon andersson, tourist and Rainerio
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