15 years there must be a good ten left, ah well it's only money.
I would not ride that bike until I had bled the two stroke pump and seen for myself that it is functioning. to do that first bleed it, then with the engine idling, turn the pump pulley by hand until fully turned (max stroke) then pull off the oil connection from the carb and witness the oil is pumping in a pulsed manner in sync with the pump strokes. Only then would I venture out on it...up to you