Malossi MHR 50cc racing cylinder kit for Yamaha Aerox & Jog RR with Minarelli horizontal liquid-cooled engines.

High-performance aluminium cylinder kit designed for competitive racing. The MHR features a lightweight, silicon-titanium alloy cylinder with a hard nickel-silicon carbide coating for maximum durability and wear resistance. Precision-machined ports and exhaust layouts deliver outstanding power at high RPMs.

Includes a graphite-coated piston with a single 1mm chrome-coated ring, engineered for minimal friction and maximum heat resistance. The high-compression cylinder head improves combustion efficiency and cooling thanks to its advanced design and materials.

Ideal for race setups demanding peak performance, reliability, and precision.

This is a racing cylinder kit; you will need to use a suitable racing exhaust (Stage6 Pro Replica, Yasuni R-PRO/ C16 etc), a large carb (19-24mm) & 10mm HPC crankshaft (Malossi R.H.Q, Jasil Hi-TEC etc) etc.

Upgrading to a 12mm crankshaft is recommended, you will need Malossi piston kit 348544 and 12mm crankshaft (Malossi R.H.Q, Jasil Hi-TEC etc).

Bore: 40mm
Piston ring: 1x (40x1mm)
Gudgeon Pin: 10mm
Displacement: 50cc

Included: cylinder, head, piston kit & gasket set

Malossi 318559