Valve Adjustment

Has anyone here had the valve adjustment or done one? I questioned the Yam dealer here and they said that they had never done an adjstment on the Stryker. The 1300 engine yes but not on a Stryker. This may not be a big deal but I cringe everytime I have to take any vehicle in for service. That is why I do most of my own work. We've all been ripped-off before but it's not the money that concerns me...it's the quality of the work. BTW, The estimate was 3 hours at $75/hr.