I have a '98 Road King that has been heavily modified this year. S&S 117CI motor, Revtech 6spd trans, with ring gear and higher wattage starter to crank the monster. Had a brand new belt on, with no belt gaurds, but had been smelling burning rubber while at high speeds (this is after tire alignment with factory wheel setup). I now have around 700 miles on the bike and finally found that the smell was coming from something rubbing on the top side of the belt... there is a groove the entire length of the belt about 1/8" wide and deep. Should be easy to figure out the cause once opened back up, just wondering if anyone has experienced this before?