Several years ago when I first got the same set-up as you have I had more tire wear in the first 100 miles than I did in the next 1000. There is a slight learning curve and I found excessive tire wear is caused by one or more of the following factors:
*under inflated tire--best to run a hard tire near the psi limit on the tire sidewall.
*insufficient down pressure on the roller--too little the roller slips but too much bogs the engine down, about 3/16 deflection is good.
*jackrabbit starts--pedal start to 7 or 8 mph then feather the throttle up to cruising speed, pedal assist when you accelerate after slowing down.
*a misaligned installation--drive spindle needs to be 90 degrees perpendicular to the plane of the wheel and parallel to the rear bike axle.
*hard rubber slicks are best for friction drive, no knobby tires and the less cross tread the tire has the better.
I rotate tires front to back occasionally and get over 2000 miles out of a set with fd.
