I have heard that the TW200 exhaust will fit straight on and is restrictor free, it is also marked up as a Official looking Yam original fitment, some models are prone to get dented by stones where it says 125... How odd. A K&N Air filter certainly won´t do any harm and maybe some new jets a size bigger? How about a rear sprocket with 1 or 2 less or perhaps more teeth, depending on how the bike pulls with all this extra air being burned? I am almost certain these rumours going around about these rather torquey TW125´s topping 75mph must be true because a man in the pub told me you understand ;) I wouldn´t commit such a heinous crime myself! Anyone else heard these rumours? Power is nothing without control. Ride safe.