Checking Pitch of Engine Studs (M8x1.25 or M8x1?)

Instructional video on determining what size bolt/stud you need for your two stroke motorized bicycle engine; M8x 1.25mm or M8x1mm

[@robbyota5598]

use a thread pitch gauge, normally found in a tap and die set.

[@nomadbarka7407]

When I bought my engine one of those bolts was stripped,I get no compression ,can u help me

[@kipgibson9093]

hi I have stripped one of my studs that hold my engine head and need to know if it's a m6 do I need to get a 6mm stud