the yamaha brace isn't helping my wobble !!! but i have a 3" wheel with a 130/80x19 tire on it.
do you have a wobble now ??? go for a ride take you hands off the bars @ 40mph see if it shakes on decel. take the fender off and do the same. it's easy enough to put the fender back on make sure you torque the pinch & axle bolts.