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greg737 · October 29th, 2019, 08:21 AM

You're saying that the adjustment screw can't retract the "ball" end of the valve rocker arm any further because the base of the "ball" end is up against the underside of the rocker arm, right?

So you remove this rocker arm from the head, which is easy to do with just your fingers only, just rotate the engine until that particular valve is not under compression from the camshaft lobe.

Then remove adjuster screw from the rocker arm and gently grind/polish/sand off just a few thousandths from the underside of the lifter to give you a bit more room to adjust the lifter adjuster screw inward.

I've seen pictures of this work done to an EX250 rocker arm. I've just done a quick search for an image but couldn't find a picture to post here.

October 29th, 2019, 08:21 AM	#6
greg737 - Name: - Location: - Join Date: May 2009 Motorcycle(s): - Posts: A lot.	You're saying that the adjustment screw can't retract the "ball" end of the valve rocker arm any further because the base of the "ball" end is up against the underside of the rocker arm, right? So you remove this rocker arm from the head, which is easy to do with just your fingers only, just rotate the engine until that particular valve is not under compression from the camshaft lobe. Then remove adjuster screw from the rocker arm and gently grind/polish/sand off just a few thousandths from the underside of the lifter to give you a bit more room to adjust the lifter adjuster screw inward. I've seen pictures of this work done to an EX250 rocker arm. I've just done a quick search for an image but couldn't find a picture to post here.
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