The bike in question - 1988 R100RT with 90000 miles on it. On the last couple of outings I've had trouble starting the bike when it's good and warm. When I press the starter button I hear a click down near the engine but no start. After a half dozen tries I can get the engine to start normally. I'll do some troubleshooting tomorrow but I just wondered what the collective wisdom was and where is a good place to start.