Should I buy this 2013?

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Here is a link to a spreadsheet to give you an idea how often the valves require checking in practice;
https://docs.google.com/spreadsheets/d/1...=473671721

Checked mine at 17.000 km by myself. but all in spec, i am now at 40.000 km and i might look at 45.000 for the second check, it's a very low wearing system.