Cylinder Kit Metrakit Pro Race 4 77Cc Derbi Euro 3 / 4

Metrakit Pro Race cylinder 77cc For racing and tuning fans: Metrakit Cylinder Kit 77cc Pro Race 4 d.50mm Derbi Euro3 / Euro4, the 4th incarnation of Metrakit's "Pro Race" cylinder. Metrakit improved their Pro Race kit again, this time they achieved their goal by increasing bore / piston from 47.6mm to 50mm and displacement from 70cc to a whopping 77cc. Power 77cc Metrakit Pro Race 4 The 77cc Pro Race 4 is one of the most powerful race cylinders on the market. More power, increased torque, better acceleration—and it really shines in the higher rev range. Thanks to its 3-port exhaust design, it still delivers a smooth and usable power curve when paired with a proper 80cc exhaust system. We recommend adding a top-of-the-line reinforced crankshaft with standard connecting rod and standard stroke, a 28mm carburetor and a reinforced clutch. NOT street-legal / NO homologation. Technical details Metrakit 77 Pro Race cylinder kit aluminium cylinder with 5 transfer ports, exhaust with boost port coated piston Athena 50mm with 12mm pin, 1 chrome-plated ring 0,8mm modular cylinder head, gold cylinder gaskets (head and base) 4 stud bolts, long sensor adapter Derbi E3 / E4 water connection Note: Models with Derbi Euro 4 engine use a slightly smaller temperature sensor (thread: M12 x 1.5) than the Euro 3 models (M14 x 1.5). To fit the smaller Euro 4 sensor on the cylinder head, you will need the adapter MF96.91010.