KTM 250 SX 2003 Owner's Handbook Manual page 158

Workshop manual
5018 PDS 2003
Product
Exploded View
Disassembly & Assembling
We r k p l a a t s h a n d b o e k
34
Unscrew the nut (size 10).
Turn the nut of.
Remove the piston with check-valve.