In the diagram at left, you will find the correct measurements for proper functioning of our completely new clutch featured on the “pro” model TXT. If you see that the measurement of the complete disc pack is higher than specified, you should correct this by making adjustments using a steel shim disc. These discs are of varying thicknesses. (Similar to those used on the edition model.) At this time, we have these discs available in the following thicknesses: 1.5 mm, 1.4 mm and 1.3 mm.