Got a scare yesterday. When leaving work yesterday I must have passed through some gravel in the parking lot. I could hear what sounded like a lot of pebbles hitting inside the front wheel cover. I didn't think much of it until I stopped at exit of parking lot. That's when I noticed my right brake lever had no resistance like a brake line had broken. I stopped immediately and did a full examination of the entire brake system. I found no issues but did notice some white rock residue on the front brake disc which I assume meant a rock had been crushed. So with only half braking power I decided to take a slower/safer route home. But when I got back on the Burg 650 and pumped the right lever 3 times the braking power returned. Brakes were fine all the way home. Not 100% sure what happened. Anyone have this problem before? I've been riding bikes since 17 and I'm 62 now...and never had this happen before...