AFAM designs and manufactures the components of its transmission kits by placing very specific objectives, such as light weight, low noise, limiting the power dissipated and others: chain, rear sprockets and front sprockets so accrued guarantee excellent performances. The AFAM kits are of two types: The Standard step closely follows the original equipment size while the step 520, with Racing orientation, can significantly reduce the weight of the transmission in favor of significant improvements in acceleration.