If the question i sdo any come without shims, the answer is some come with springs but shims are the correct way to center the rocker. The better sets of rockers still use shims. It's part of the engine building process on a performance engine.
I'll also ad to JohnRRs answer on shimming the rocker shafts to correct the geometry that the valve job is the only thing on a saddle type shaft rocker that affects geometry. Well, sometimes different rocker ratios and manufacturers might a little too, but it's basically the valve job.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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