I know from reading the odd post that the stock YZ125 is pretty potent, and pretty hard to improve on, and after spending a few weeks on it, I am very impressed by it in stock conditon. With this in mind, is it worth throwing on the usual bolt on mods such as pipe, silencer, and reeds? I've got the suspension sorted and my favourite tires on it, just wondering if I should look to chase power, or simply ride it as it is. Am I going to notice the difference if i drop 500 notes on the simple bolt on power mods as outlined above? Would the guide for the YZ250 pipe test be a realistic idea of what each pipe does? Could someone with a bit of experience outline briefly what each pipe does, ie PC top end, FMF bottom end etc?