I have an 87 Virago 700. Recently I laid it down on a slow turn. There is no visual mechanical damage, fortunately. Some oil spilled out of the air intake. I replaced the filter. Before the drop, engaging the first gear was smooth and easy. Now, after the drop, the engine stalls unless I run the engine at 3000 rpm. Even when the gear engages, the bike gives a little kick and there is a short power drain without a stall. What is going on and how do I fix it?