Automatic VOCA Racing waterpump cooling kit for Derbi E3 / D50B0 engines. The original Derbi waterpump has a very limited water-flow and cooling performance. Especially in highly prepared engines a much better cooling system is needed. The VOCA cooling kit substitutes the mecanic for a much more efficient brushless electric waterpump (waterflow 25 L/Min) which on top is conected to a new flow optimized waterpump cover. The waterpump is automatically activated by a thermocontact, no aditional switch is needed. The instalation is simple, any user with basic know-how can handle it. VOCA Derbi E3 cooling kit: – CNC machined red anodised waterpump cover. – Brushless waterpump: 25L/min, 12V, Ø conection 15mm. – VOCA CNC machined T-Link 1/8″. – Equiped with thermocontact: range 70ºC (ON) – 60°C (OFF).