50cc engine Cam Timing

How to cam time a small engine for dirtbikes atv ect while fixing my 0 compression engine.
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[@walterhorn5342]

very well showing and how it's done good job

[@inutmiriu6518]

Thx

[@user-ok4mi6cj3i]

How to set my timing on my scooter

[@Camvba]

Bro my dot was on the other end no wonder its not running