Hello, this guide is for people who have a problem with their ACS Claw freewheel. I have looked but I cannot find a guide for other riders who have the same problem, so i thought i would post it. Firstly get your tools. Here's what i used: A philips screwdriver, and my hand . Then turn your cranks round until you find a small hole like this one on the back of your freewheel: Next, put your screwdriver in the hole: Slowly turn the cranks backwards and hold the screwdriver tight so it stays in the hole and wedges against the frame: Turn the cranks backwards very slowly: ( If you dont, if the screwdrivers slips out the pedal will hit your in your wrist This will tighten up the freewheel and hopefully stop that horrible clicking! Thanks for looking, Brett.