catzuki
Active VIP Member
Well im lookin to do some stuff to my 07 XRS 159. My clutching seems fine but i notice it does drop sometimes, but the helps when it does that. I have been told to do a head and an rejet a little. But im wondering what anyone has done to theres if any one has. It has lots of power but i was told by a few different people that the head is a big difference. So im just lookin for opinions from some people.