When riding the 93 R100R the other day I noticed when coming to a stop the engine idling fast then slowly dropping to maybe 1,100 rpm. (I usually set it at 1,000.) Continuing home I could notice the reduction in engine braking. Just curious what would cause this? It never did this before. Neither throttle cable was tight and it was actually pretty cool during the ride. Nothing in the way of adjustments were done prior to this ride. Throttle cables slide well and actually was replaced at about 12K. The bike has 25K now. Valves set and carbs synced about 2,000 miles ago.