Yamaha jack question (I figured...)

[Jon Page]

Having the jack reset when the damper pedal is released indicates
that the wippen needs the damper lever spring tension to force the
front of the wippen down.

Tight balance rail holes would restrict the key from returning efficiently.
Yamaha is usually pretty good in the balance hole height department
but they might need easing. The key bushings might be a bit snug as well.
Is there buildup at the base of the pin?

Yamaha usually uses back lead so the key might not be front heavy
which would tend to cause 'sluggishness'.

Some American oldies sometimes develop problems because the
damper spoon wore a hole in the lever felt.
-- 

Regards,

Jon Page