i finally got my usb programmer, before i had it i had the timing advance set on 2 on speedo and had to retard the motor about 10 degrees to take away the cogging, i switched the timing advance to 1 in the speedo and moved the motor timing to 0 and its much better feeling with a 17.5, also been trying the new profiles posted on KO site and really like the tc profiles haven't tried any others yet.