Motorcycle Engine Oil Thermometer Gauge by JMP, Germany. Easy to put on, replace the original oil filler cap There is a rubber O-ring attached to it.
Useful to see the oil temperature while driving. If the temperature is different from the original to the point of noticing It is a warning signal of missing oil, water pump, oil pump not working. Fan not working Warn to check early. Prevent overheating until major damage can follow. Add beauty give a classic custom.