Hi! Yes you do need to check your valves every 2000km, as described in your service manual (Google it or search on FB) I adjust mine at 2k and inlet valves was to tight and outlet was to big (usually other way around) so it is a necessary check. Read and learn to know your bike, much easier than human relationships
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Enduro driver since 1985--1998
Newborn off road driver since May 2018
Bikes:
Husqvarna 125 XC 1982
Husqvarna 125 WR 1986
Husqvarna/Cagiva 125 WR 1987
Yamaha WR 250 1992
Husqvarna WR 250 1995
XT660R 2009 (LINK TO MODS)