I have a cheapo timing strobe and it works fine for me. I've never used anything other than that though. But yes, it's best to check timing with a strobe because you can check your timing at advance. Since these bikes are ridden 99% of the time over 3k rpm, your advance setting is more important than idle setting.
For my tune ups, I do static first so I'm close and then Do a dynamic with a strobe and tweak if needed.
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