Air screw

Practical Sportsbikes (UK) - - Fettling -

Prior to re­mov­ing air screws and so on, wind them all the way in, count­ing the turns as you go to en­sure you can re­set them as close as pos­si­ble to their orig­i­nal po­si­tions. There’s a spring in here too and it’s also worth check­ing for O-rings.

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