So I have pulled the valve cover and measured the clerance of the valves on my '84 xs400 maxim, only 1 intake was out of spec. I changed the intake shim and now it good but the exhaust valves are very noisy during warm up and not so bad once hot. You can still hear them tap even hot. So how could they be so noisy but still be in spec?

I am taking my measurement when the lobe is directly opposite the shim.

So I have pulled the valve cover and measured the clerance of the valves on my '84 xs400 maxim, only 1 intake was out of spec. I changed the intake shim and now it good but the exhaust valves are very noisy during warm up and not so bad once hot. You can still hear them tap even hot. So how could they be so noisy but still be in spec?

I am taking my measurement when the lobe is directly opposite the shim.

its usual to use RT and LT marks on the crank for timing, hence the reason they are there.

what sort of oil are you using?

its usual to use RT and LT marks on the crank for timing, hence the reason they are there.

what sort of oil are you using?

I am using 20w-50 castrol motorcycle oil.

I will re-do the timing making sure I line up the RT - LT marks, I can't say forsure I had them lined up or not.

I am using 20w-50 castrol motorcycle oil.

I will re-do the timing making sure I line up the RT - LT marks, I can't say forsure I had them lined up or not.

on compression stroke of course.

recommended oil is 20w 40 5'c plus and 10w 30 < 0'c plus with type SE oil

So both exhaust vavles are at the limit of .08mm, looks like I'll need to re-shim them both up one number. Left side was a 260 and right a 265. That would explain the loudness during the warm up. Now to look at the timing chain for play amount and how to retension.