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January 8th, 2006, 09:31 AM   #1
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Too much radial play in rocker arm

One of my rocker arms has a radial play of about 1mm... The one on the exhaust side.

When I push it back and forth, I hear a little "tick!" sound. I can see it move and I would think it's about 1mm.

I tried to adjust with the #3 allen screw in the front but nothing. Or sometimes I manage to reduce the play but when I retighten the #4 screw on top, then the play is back...

What could be the problem?
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January 17th, 2006, 05:07 PM   #2
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Re: Too much radial play in rocker arm

I'm a little confused about your description. Are you referring to rocker arm end play (axial clearance) on the rocker arm shaft.....or worn rocker arms that are too loose and wobble on the rocker arm shaft?? The axial clearance is easily adjustable.
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January 17th, 2006, 05:33 PM   #3
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Re: Too much radial play in rocker arm

The first. Well, can't adjust it... Screw turns endlessly...
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January 17th, 2006, 08:01 PM   #4
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Re: Too much radial play in rocker arm

You don't turn it to adjust, but rather push it in, then tighten the top allen bolt when appropriate.
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August 21st, 2006, 10:28 PM   #5
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Re: Too much radial play in rocker arm

I have been laying sleepless this night with the same "problem"
In the manual it says clearly: PUSH...
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August 22nd, 2006, 03:15 AM   #6
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Re: Too much radial play in rocker arm

mr le frog sir

i have the solution , head straight down to your local dealer and grab an 06 version
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September 2nd, 2006, 07:05 AM   #7
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RE: Re: Too much radial play in rocker arm

I've got the same problem, about 1mm end play (axial clearance according to Chas in the previous few posts) on the exhaust rocker arms.

Brendan - could you please clarify which bolt you mean when you say tighten the "top" allen bolt when appropriate.

There's an allen bolt M5x8 on the side at the end of the rocker shaft, and one on the top of the head cover that goes through a hole in the rocker shaft. I cant work out how either of them can adjust the end play of the rockers on the shaft.

Mine is a 2004 fs650, its my first Husa too, so apologies if its a dumb question, but thanks in advance if anyone can help.
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September 2nd, 2006, 09:31 AM   #8
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Re: RE: Re: Too much radial play in rocker arm

Originally Posted by xristos
I've got the same problem, about 1mm end play (axial clearance according to Chas in the previous few posts) on the exhaust rocker arms.

Brendan - could you please clarify which bolt you mean when you say tighten the "top" allen bolt when appropriate.

There's an allen bolt M5x8 on the side at the end of the rocker shaft, and one on the top of the head cover that goes through a hole in the rocker shaft. I cant work out how either of them can adjust the end play of the rockers on the shaft.

Mine is a 2004 fs650, its my first Husa too, so apologies if its a dumb question, but thanks in advance if anyone can help.
Maybe I can help. Refer to the attached picture from the 00 parts manual. I am using it instead of the 04 manual because the 00 picture is easier to understand.

Put the piston to TDC on the compression stroke just like you do when adjusting the valves.

The screw you need to loosen is the #32 screw. Only loosen one screw at a time or you might disturb the seal between the rocker arm cover and the head.

The #14 rocker arm end plug is a sliding fit in the #11 rocker arm cover. It has a large clearance hole in it for the #32 screw to fit through. As you can see from the picture the #32 screw threads into the #1 cylinder head. When you tighten the #32 screw the hole in the cam cover is squeezed and tightens oround the #14 end plug holding it in place.

When the #32 screw is loose, you can push on the #15/#14 screw and end plug and move it axially on the shaft and in the cam cover. By pushing on the #15/#14 screw and end plug you slide the plug on the shaft toward the rocker arm, thus changing the rocker arm axial clearance. I push with one finger and feel the clearance with the other hand through the valve inspection port by trying to axially move the rocker arm back and forth. When it feels right whille pushing on the plug to keep it in place I snug the #32 screw down to hold the end plug in place. I check the feel again, and if still good I torque the #32 screw to 10 Nm. and then repeat the process on the other rocker arm.

The axial clearance specification is 0.05 +0.05 mm. (0.002" - 0.004")

The #14 end plug is counter bored to slip fit the end of the #13 rockerarm shaft.

The rocker arms and their integral bushings slide onto the shafts.

The other end of the shafts fit into holes ( not visible in this picture) drilled into the rocker arm cover.

I hope this helps.

Regards,

Joe
Attached Files
File Type: pdf Page 26 from 2000 Parts Manual.pdf (65.5 KB, 72 views)
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September 5th, 2006, 12:16 AM   #9
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RE: Re: RE: Re: Too much radial play in rocker arm

Crystal clear! Thanks mate, much appreciated.
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September 6th, 2006, 11:56 PM   #10
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RE: Re: RE: Re: Too much radial play in rocker arm

I have a similar problem, I got way to much axial play at the same time as I got way to much valve clearence so I adjusted the axial play and everything was fine for about 5minutes then the valve clearance breaks open, over and over again.

What do you think would be the problem? Problems whit the rocker arm bushings breaking apart?
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