and then......??if they are air... on the left leg you will have to open them up and use a long arse allen key to turn a bolt at the bottum... i welded a 12 mm bolt on to a rod of steel...
you will have to turn the bolt clockwise to slow down the rebound... it wont take much to see an inprovment... do back up and test... you may have to repeat the process a few timesand then......??