Thanks, the small port on the air spring was blocked with grease . I let the air out, took off the top cap and pulled up really hard a few times. There was a pop sound and the forks equalised. The fork is now much better.if you doing this for shockwiz ratio check, then yes the forks should be very deflated but not necessarily full compressed, as for extending them with no air, it's difficult (I hold the wheel down with my feet and pull hard) but not impossible...
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