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June 29th, 2016, 12:27 PM   #1
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06 fe450 broken valve spring :(

Hi guys, i own a 06 fe450 and it became hard to start. Had to hold throttle whe. It did start as it would not idle. I brought the bike to my mechanic and he checked it. He said one exhaust valve spring on the right side has broken.

Now, is that a common failure?

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June 29th, 2016, 12:28 PM   #2
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The bike has 96 hours on it from new
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June 29th, 2016, 01:43 PM   #3
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Very common failure but not at 96 hours. Usually after 200 hours or more the exhaust spring will break.
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June 29th, 2016, 06:46 PM   #4
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What kind of damage this usually does?
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June 29th, 2016, 06:46 PM   #5
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My bike is mint and really has only 96.6 hours on it
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June 29th, 2016, 06:52 PM   #6
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Last edited by Dallard2; June 29th, 2016 at 06:55 PM.
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June 29th, 2016, 06:57 PM   #7
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June 29th, 2016, 08:17 PM   #8
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Originally Posted by Dallard2 View Post
What kind of damage this usually does?
No other damage, just the broken spring.
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June 29th, 2016, 11:00 PM   #9
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Suggest that you remove the head and look to replace the two exhaust valves. my experience is that the percussion that has been going through the valves has really, really hurt them. about 20-50% of the valves break the heads off with the new valve springs whether they are DVSK or Std.

suggest 2 new exhaust valves and the DVSK, a HG and you'll need a cam chain because they are usually soft link only fitment.

while you are there I would upgrade the auto decomp spring and maybe just do a pair of cam bearings which are cheap enough. check the tasppet pads for cupping.

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June 30th, 2016, 05:21 AM   #10
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Any machining on the valve seats need done when doing this? I dont mind spending some dollars on this, but time is something i dont have to send the head. Leaving for a one year trip on the 13th of july. Need this done way before...
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