Fixing device for two-stroke engine

A two-stroke engine comprising:

• a crankcase;
• a cylinder;
• and
• a combustion chamber formed in a cylinder running surface with a cylinder head, which closes the cylinder at an end of the combustion chamber, and with an outlet port of the combustion chamber,
• wherein:
• at least one transfer port is formed in the cylinder in order to connect the interior space of the crankcase with the combustion chamber,
• the cylinder comprises at least one axial bore, at least partially penetrating a wall of the outlet port and/or of the transfer port, so that the bore at least partially forms an opening at the wall side in the outlet port and/or in the transfer port, and
• a pin is in the at least one bore and closes the at least one opening at the wall side in such a way that an original surface of the wall of the outlet port and/or of the transfer port is substantially restored in the area of the opening at the wall side.