When you inspect the reeds....check to see if they are warped or if there is an excessive gap between them and the reed cage. As far as the coolant overflow, the only time the overflow tank really comes into play is from excessive heat. The Radiator cap will open and coolant will flow. Next time you take it for a ride, empty the overflow but make sure the radiator is topped off. When the ride is over, let the bike cool and recheck the radiator level. If it is low, then either you are overheating or you have an internal leak. If coolant is getting into the cylinders via the head, it would make it VERY difficult to start. Your problems could be related. But if it runs like a champ once its started....thats not likely the problem.