Lower Thermostat Housing for Linahi 170mm 173mm Lnhai Horizontal Engines 260 and 300
The thermostat fits in engine head and lower case fits over the thermostat and bolts to engine head, a gasket is not used but I would use some sealer anyway
DIA-05-028-3102
Bolts that hold lower case to head are M6X25 these are meric bolts sold at Lowes and other hardware store very common size found on all scooters.