KTM 250 SX-F 2005 Repair Manual page 39

4-6
– Lift off the cylinder head, paying attention to the chain tensioning
rail.
– Discard the cylinder head gasket, remove the dowels.
– Lift off the cylinder, paying attention to the chain tensioning rail.
– Discard the cylinder base gasket, remove the dowels.
– Carefully remove the piston pin retainer from the groove.
NOTE: for easier demounting/mounting, remove the piston pin retainer
opposite the timing chain compartment.
– Carefully push the piston pin out of the piston; remove the piston.