This is an excellent example of a clean thermostat installation on an RS125 bike.
Craig used a Tee connector to cut into the lower radiator line and a straight piece of 3/4" hose to connect the lower thermostat bypass output to the Tee.
	Two pre-formed 90 degree bends and straight coupler to connect the upper thermostat fitting to the top of the radiator. Using pre-formed bends will keep your hoses from kinking.
Here you can see another pre-formed bend which was used to connect the output on the cylinder head to the input "side" of the thermostat.
Remember, since the temperature sensor for your temperature gauge is in the radiator, it will no longer show actual engine coolant temperature. It will only show the temperature of the coolant in the radiator.