On my 07 9m Rebel one of the one way valves on a strut isn't working. Sometimes when i pull the pump out of the one way valve, it doesn't work at all and the air rushes out. Other times the air slowly comes, and other times the valve works fine and no air comes out at all! I find if I yank the pump out really quickly, the valve closes off and i have no problems, but most of the time it doesn't. Can anyone tell me what i can do to fix this as it is really annoying having to take 20mins out of my session to pump one tiny strut up

Any help appreciated, thanks.

Kind of did the same thing as slack but took the strut bladder out of the kite, soaked it in boiling water and same thing, but didnt wait 24 hours, just till it cooled

Try a smijen of vaso on a match and lubricate the entry of the valves as this will greese the rubber, ensure no sand is present...after time the rubber fittings seem to perrish and deform which may be why air is escaping because the shutoff flap is not seating...... will compliment Slacks idea to flatten the rubber again