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June 27th, 2020, 01:33 AM   #1
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I Ride: Husaberg fs 650 2007
Tips for adjusting the valve

I am checking the valve clearance on my husaberg 650 07. I have doubts to remove:

1) Can I adjust the intake valves as soon as the exhaust valves open?

2) Can I adjust the exhaust valves when the intake valves are full opened ?

3) when I screw the valve adjustment screw to move to tolerance 0 and then unscrew 1/6, how can I feel the point 0 without compressing the valve?

4) is the 1/6 method valid or is a thickness gauge 0.12 better?

5) do you think the drain valves need greater tolerance?

Last edited by Alfy; June 27th, 2020 at 02:27 AM.
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June 27th, 2020, 02:47 AM   #2
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Well there are several threads about valves and their ajdustment, so take a look at them first and i think youll find more answers.
Here:
https://r.tapatalk.com/shareLink/top...ink_source=app

But to summarize
1 & 2: no you need to set the piston at TDC so that they are both closed and no pressure is on the valves from the cam.

3. You will feel it very easily, take a look at the exploded view at the cam and its parts and you'll see that the arms sit ontop. Just try it and you'll notice it when it just stop, just dont force it.

4. Yes I does work just as good but I think it's a personal preference since everybody does things differently in a garage. But doesn't hurt to do 1/6th method and before you put back the valve cover, jam in a feeler gauge and double check if you want.

5. What do you mean? All 4 valves have the same tolerance

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June 27th, 2020, 05:44 AM   #3
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Thanks for the replies. About point 5) I raised the question (and also others here in the forum asked) because all the bikes and cars have greater tolerances on the exhaust valves
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June 27th, 2020, 06:55 AM   #4
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My 1/6 tool
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Tips for adjusting the valve-img_20200627_152842.jpg   Tips for adjusting the valve-img_20200627_152833.jpg  
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June 27th, 2020, 07:24 AM   #5
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Yeah about the exhaust clearance being the same as intake, I dont know why exactly. I've never really thought of the direct effect of minimal valve clearance differences other than that the timing differs and heat expansions that occur to the valvetrain. Otherwise I'm not sure. Nice tool you made there! I just shortened an old screwdriver to keep it in place and use the locking nut as a reference.

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June 28th, 2020, 05:03 AM   #6
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some people have a 'chubby' screwdriver. a little thing about 50-80mm long. the smallest in your tool kit. if you have one with exchange ends then use that. they are brilliant. just use the metal part.

Taffy
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