650 ss tappett adjustment

hillbone said:

Hi again.
When adjusting my tappets, I would have imagined that approximately the same amount of thread on the adjusters would measure the same. But there is a big difference between the 2 inlets left and right and the same with the exhaust. When refitting the head, i triple checked each pushrod and dropped nicely into cam followers and each pushrod is correctly seated into each rocker. 2x
My logic tells me the thread adjutment should be roughly the same.
Thoughts please.
Cheers

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marinatlas said:

Did you checked the lenght of both pushrods ? as the pre 125871 are 2.5/3 mm longer than later one ....

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hillbone said:

No i didnt but would that not mean that they would still be uniform ?
thanks for posting.

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Thomasa said:

Is this a new build? If not the ball/nubs on the adjusters may have worn into the valve stems. Years ago in the shop I would put hardened lash caps on to rectify this problem. Otherwise customers were on the hook for a valve job if the stems were too bad.

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hillbone said:

Hi again.
When adjusting my tappets, I would have imagined that approximately the same amount of thread on the adjusters would measure the same. But there is a big difference between the 2 inlets left and right and the same with the exhaust. When refitting the head, i triple checked each pushrod and dropped nicely into cam followers and each pushrod is correctly seated into each rocker. 2x
My logic tells me the thread adjutment should be roughly the same.
Thoughts please.
Cheers

Click to expand...

marshg246 said:

If the valves all open an close and you don't hear anything odd, you're probably OK. Also, hard to tell form the picture angle, but the adjusters look like they are different lengths - take a look at all four and see if they are the same lengths or not.

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