Tonio I am in the process of doing mine at present, Its quite an easy job, but from what i can gather the results depend on how you ride the bike, advanced = higher peak power later in the rpm range and a more std setting will give a lower down torque increase. If you do a search for moto one performance you can do a little research yourself. I recon there is a couple of bhp to be had by advancing by a few degrees whilst still maintaining a healthy torque curve. Problem i have is no bench mark, With the BB kit on I had 49bhp I expect to beat this with the 583 kit but obviously expect a lot less torque. i suppose the thing to remember is that BHP sells bikes, Torque wins races. glyn |