Valve shim adjustment calculations made simple Valve Shim Formula
Checking and Adjusting Valves on Your Shim-Under-Bucket Style Comments Section · Formula for intake valve: =(B6/100+1.69*(B7-0.13))*100 · Formula for exhaust valve: =(B12/100+1.87*(B13-0.229))*100. Here's a quick explanation of what happens as valves wear. How To Check & Adjust Shim Type Valve Adjusters Ft. KTM Duke/RC 390 I think micrometer reading is easy when you know its divisions. ...