I do all my own motorcycle servicing, valve shims, throttle body balancing, brakes, suspension seals rebuilds tyre changes etc...
I enjoy it and I've acquired the tools to do it. I don't trust dealers at all. Too many instances where I've been charged for valve adjustments, but the com cover hasn't been taken off..or getting a bike back from a tyre change with 60psi. etc..
The car I take into the main dealers as it's just more convenient and I haven't got the facility or inclination to go sliding underneath...