Large wheel Speedway question - Front forks

#1
I have a question for the people in the know.

On the large wheel Speedways, like the Green Horn I picked up at the Mini-bike reunion this year (also Red Baron, Blue Angle and Widow Maker), when taking the front forks apart, how does the little valve assembly on the bottom of the tubes come off? Is it press fit or does it screw in? If screwed in, is it regular threads or left hand threads?

Thanks in advance,

T Mack 1.

 
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