KTM 125 SX 2010 Owner's Manual page 793

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– Turn the membrane holder up side down and remove the spring.
– The check valve pin. .
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NOTE: It is not possible to disassemble the check-valve pin out of the
membrane holder!
Check valve SX 2007:
– Press against the check valve with a suitable screwdriver and lift
out. Remove the check valve and the spring.
Inspection of the check valve spring
– Check valve spring.
– The length of the spring must be 8.0 +/- 0.2 mm (up to model
2006) or 6.5 mm +/- 0.25 mm (2007).
– Replace the check valve spring if the length is less then 7.8 mm
/6.25 mm.
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