Radial POLINI cylinder head Ø46 to 47mm air for kit 70/75cc on MBK 51 / motobecane av10 / AV7

The POLINI cylinder head for AV10 / MBK 51 motobecane engine is in terms of design the best that can be found. It is XXL in size and it exceeds a minimum of 10mm all around the cylinder depending on the kit used. However, it can only be found in the "with decompressor" version, so it will have to be plugged for those who do not want it. In addition, it has an unpolished (micro-blasted) and oval-shaped "cap" compression chamber, a performance level preference will be given to a round, angled, frustoconical version without rounding and polished. However, the chamber caps can be modified very well with a small DREMEL abrasive roller for those who have few tools, so you can easily modify its compression rate! The squish zone is zero.

It is the only MBK 51 av10 radial type cylinder head still available. We will use a spark plug with a short base (standard on av10) and the quality of its alloy as well as its shape will allow extreme cooling.

Cylinder head delivered without cylinder head gasket and not having an engine numbering location.