I have an overheating issue on my 175L Pro XS OptiMax (model number 1175P73EY), (serial number 2B121880).

I want to replace the following parts to see if I can resolve the issue.
- Poppet Valve
- Thermostat’s
- Any corresponding gaskets for these parts.

I don’t know where to search/find the needed parts.

Help Please, if you have the time.
TIA