I just checked my valve clearances and they are all within spec (barely). 34,000km. Intake Spec: 0.18mm-0.26mm Mine are 0.19mm, 0.20mm, 0.19mm, 0.20mm Exhaust Spec: 0.27mm-0.35mm Mine are 0.28mm, 0.30mm, 0.31mm and 0.32mm My understanding is that in a shim under bucket system, as things wear, the clearances get tighter rather than looser like rocker arm set-up. So if things get tighter you would always want to adjust all the way to the high end of the spec so you get the most bang for your buck? With all my current clearances being so close to minimum I'd want to shim right to 0.26mm on intake and 0.35mm on exhaust rather than mid-scale correct?