I'm confused, too many posts, too many jet sizes, jd, bk, it all starts to blend into one big I live in Victoria Australia, and i own a 01 WR426. i want to know what i can do to it to make it a lethal machine. it is all stock except the pipe, which is a Barretts. Should i do the yz cam & timing thing ? What sizes should the jets be ? Should i get a kit for the carby ? What octane fuel should i be using ?