Thanks Dave, that makes sense to just remove the fan switch and use it as an inlet for the expansion tank. Another random question, I've got what looks to be either a coolant hose or a vacum hose that goes from the inlet manifold right infront of the thermostat (near cylinder 1) that then goes around the front of the engine and connects in on the head on the exhaust side above the spark plug for cylinder 1. Any idea if this a vacum or coolant pipe and if it is a coolant pipe how should i re-route this as I won't have any coolant outlets on my bike carb manifold?
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