Top Performance FL Engine Cases – AM6

The Top Performance FL engine cases are the go-to choice for serious builds on the Minarelli AM6 engine. Designed to house large-bore FL cylinders (LMR, FAST, MONAYA, ROOST, 8.1), they unlock builds capable of reaching ~40 bhp at the wheel.

To maximise intake area, Top Performance removed the balance shaft: the reed cage opening is enormous and ready for a Yamaha Banshee 350 reed valve (available on our site). The cases are sized for 46, 47 or 48 mm stroke crankshafts. A new gearbox selector bearing is included for smoother gear changes.

The pack includes:

• FL engine cases (pair)
• A gearbox selector bearing
• A specific clutch pushrod stop
• The fasteners

Benefits:

• 📈 Massive power potential: up to ~40 bhp at the wheel with the right build
• 🎯 Oversized intake opening, designed for a Banshee 350 reed valve
• ⚙️ Full compatibility with all AM6 internals: gearbox, clutch, ignition, water pump
• 🔧 Direct fit on all AM6 frames on the market
• 🏁 Accepts 46, 47 and 48 mm stroke cranks to match your project

Note: the Yamaha Banshee 350 reed valve is sold separately on our site. FL cylinders (LMR, FAST, MONAYA, ROOST, 8.1) are not included.