I was wondering if the 06 has a 160 main like my 07. Some of the members are using a 170 and it seems like a big jump unless we are hitting the desert. I did go with the 148 pilot and it helped throttle response a little. I only race and ride on a motocross track. Winter weather has limited my testing and riding lately, so any help would be appreciated so I can be ready when the track dries up.