Knocking noise from engine

[FA50 rider]

there is a knoking noise coming from my engine
1995 rmx250 2 stroke
sounds like its coming from the power vavles any idea of what is going on?
thanks johnnie

[NighthawkNZ]

there is a knoking noise coming from my engine
1995 rmx250 2 stroke
sounds like its coming from the power vavles any idea of what is going on?
thanks johnnie

Gremmlin trying to get out... my advise it take to the machanic