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650FE Valve Isssues

Joined Jul 2007
19 Posts | 0+
Salt Lake City, Utah
I remember a discussion a couple of months ago concerning a problem with the valves on the 650FE I can't remember if it was something with the guides or springs or valves themselves. I have searched everything I could think of and can't seem to find it. I want to take any precautions necessary to prevent any damage. Anything I should be watching other than regular adjustments?
 
There are a few issues which can arise. Valve springs can break although I've not had one go in 140 hours of road ridding. Taffy does a dual valve spring conversion which has good reports of solving this problem. Rocker arm bearings are another, I've had one of these let go. They can make a mess if the needles fall in the wrong place, I was lucky and the debris fell to the bottom of the clutch casing witout causing further damage. The latter can be avoided by keeping your valves adjusted correctly, too loose causes hammering on the bearings from the cam, which eventually fractures the needle rollers, too tight puts too much constant pressure on the needles again causing them to collapse.
How old is your bike and how many hours/miles has it covered?
 
I have a 2007 with about 30 hours, single track mostly. So there is not a "cupping" problem or anything like that?
 
I don't think you should have any trouble with a 2007, any glitches were pretty much sorted by then, 30hrs is barely run in too. Frequent oil changes and 20hr valve clearance checks should see you ok.
One thing I would check is the primary drive gear nut. There have been quite a few occassions where it has come lose from new due to being incorrectly torqued from the factory, friend of mine had it happen on his 2008 650 with only 25hrs on the clock, pretty much wrecked the entitre engine. Worth popping the clutch cover off, removing the nut and applying a drop of threadlock and re-torque it, will only cost you a gasket if the old one can't be saved. Check out some old threads on primary drive nut and you'll see why.
 
Freaky said:
There are a few issues which can arise. Valve springs can break although I've not had one go in 140 hours of road ridding. Taffy does a dual valve spring conversion which has good reports of solving this problem. Rocker arm bearings are another, I've had one of these let go. They can make a mess if the needles fall in the wrong place, I was lucky and the debris fell to the bottom of the clutch casing witout causing further damage. The latter can be avoided by keeping your valves adjusted correctly, too loose causes hammering on the bearings from the cam, which eventually fractures the needle rollers, too tight puts too much constant pressure on the needles again causing them to collapse.
How old is your bike and how many hours/miles has it covered?

We use the knibblewhite dual valvesprings from KTM SX, works well and are a bit softer so it saves the rocker arm roller bearing.

Fits bolt on to the 2004-2008. On some early models a bit of grinding is nesessary on the valve cover, not a big problem.

//Thomas
 
Thank you Freaky and Enginehardware. I enjoy working on my bike and learning new stuff but a little afraid at getting in over my head as there are no Husaberg dealers within 500 miles of me. So this forum is very useful because of people like you.
 

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