You will require these 29.5mm shims to adjust classic Suzuki motorcycle valve clearances. Sizes run from 2.15mm to 3.10mm in .05mm increments. We also stock a complete 29.5mm valve shim kit, which has two of each size shim. These are OEM-equivalent, hardened valve shims for the GS400, GS450, GS750, GS1100 and other vintage Suzuki bikes. And make your life a little easier with our Suzuki shim changing tool that fits all Suzuki 4-strokes with shim-type valve tappets.