I have a question for you guys
I have just bought a brand new os max FS81 alpha , it´s my first four stroke engine, las week I just took it apart, because I am quite curious , and now I can´t get the right timing , how do I have to do it? , does someone have a tip on how to do it? , there´s no info on the manual regarding this issue, there´s not even enough info on how to calibrate the valves , I have looked around , but with no success.

Thanks for your help

Peter