MR12 is nasty stuff. The small gains are not worth the effort of dismantling and cleaning afterwords.
See linky.
Residue in exhaust ports (MR12 issue?)
AF1 Racing is a top-rated authorized Aprilia, Vespa, Piaggio, Moto Guzzi, Zero, Energica, Ural and SWM
www.apriliaforum.com