Tuning Kit Cylinder + Crankshaft Motoforce Minarelli horizontal LC

Motoforce engine kit Yamaha Aerox: 50cc cylinder + crankshaft

With this kit, you can fully rebuild your Minarelli horizontal LC engine (Yamaha Aerox, MBK Nitro, Malaguti F10/F12 etc.). It includes the main components – cylinder and crankshaft – which are perfectly matched for easy installation, no modifications required. The ideal solution to restore full performance to your liquid-cooled 50cc Minarelli horizontal engine – reliable, precise, and built to original factory specifications.

The main advantage of this kit is that all parts are carefully matched to work together smoothly. All necessary gaskets, seals, and bearings are included for a complete, hassle-free installation.

contents OEM style engine pack:

• 50cc cylinder kit with pistons and accessories
• OEM quality cylinder head
• OEM quality crankshaft
• Cylinder gasket set
• Bearings and seals

50cc cylinder MotoForce aerox

The 50cc MotoForce cylinder matches the original Minarelli horizontal LC engine in all technical details. Made of cast iron, it features the same number of transfers and identical exhaust port design. The 2-ring piston with 10mm wrist pin and circlips is included and ready for direct installation.

- Bore: 40mm
- Material: cast iron
- Pin: 10mm
- Included: Piston, rings, pin and circlips

OEM style cylinder head Minarelli horizontal LC

This cylinder head is a high-quality, cost-effective alternative to the original. It meets all technical requirements for reliable operation in 50cc engines. Its universal design is compatible with both original cylinders and aftermarket replicas, making it suitable for future upgrades or maintenance.

Crankshaft OEM Quality Yamaha / MBK

The included crankshaft exactly matches the dimensions and specifications of the original. It provides the same pre-compression and running dynamics as the stock crank. A robust and economical solution for replacing a worn or damaged crankshaft, maintaining the original measurements, balance and tolerances. Includes HQ small end bearing 10x14x13mm.

Crankshaft bearings and oil seals

The kit includes reinforced, high-quality bearings designed for long life and smooth operation. Supplied as matched pairs with the corresponding seals to ensure perfect sealing and a quiet, reliable engine.