Tuning a bowl consist of cleaning and adjusting the air gap of the coil. Checking that all the nuts & bolts are tight. Check the bolts that hold the springs are torqued to specs. Check the spring stacks for cracked or broken springs. And check for broken or excessive wear of the tooling, track(s), and returns. We can make new tooling or tooling parts if there are none available from the manufacturer, or if the manufacturer is not known.