Description Top Performances engine Kit - 77cc cylinder and crankshaftTop Performances responds to the needs of scooter riders with this complete engine pack: 77cc tuning kit for MBK Nitro / Aerox (horizontal Minarelli) at a great price. Known for high-performance Big Bore kits for 50cc motorcycles, Top Performances now brings that expertise to scooters with this convincing 77cc aluminum kit for horizontal Minarelli engines (MBK Nitro, Yamaha Aerox, etc.).Top Performances 77cc aluminum cylinderMade from aluminum with a protective Nikasil coating, this cylinder features a 50mm bore. It has 6 transfer ports and a bridged exhaust port. The high-compression two-piece cylinder head includes a direct-flow combustion chamber. The large exhaust port delivers strong top-end power. A cooling channel completely surrounds the exhaust area for optimal heat dissipation.Top Performances Racing CrankshaftThe included reinforced full-circle racing crankshaft features a 40mm stroke, 85mm connecting rod, and 12x15x15mm small end bearing. As expected from a high-end crank, the balance inserts are made of high-quality tungsten.Power - Top Performances engine kit for Minarelli horizontalThis 77cc Motorpack belongs in the lower high-end racing category. With the right components — at least a 28mm carburetor, inner rotor ignition, and a high-end racing exhaust — you can achieve 18 to 20 hp.Comes with 2 crankshaft bearings (C3 polyamide cage) and oil seals.Note: Minor engine case modifications are required to fit the 56mm cylinder base. Questions about the product

• Brand: Top Performances
• SKU: T9926580
• Availability: Currently not in stock
• Top Performances engine Kit - 77cc cylinder and crankshaftTop Performances responds to the needs of scooter riders with this complete engine pack: 77cc tuning kit for MBK Nitro / Aerox (horizontal Minarelli) at a great price. Known for high-performance Big Bore kits for 50cc motorcycles, Top Perform