Today wasn't a good day It started out as a great ride in some awesome mountain single track. Then we came to a large creek crossing and I made it through the creek fine, but going across a steep sloped side bank next to the creek I lost the front end on a loose rock and my bike and I went for a swim in the stream. The bike did ingest some water, the oil was somewhat milky. Luckily it didn't hydro lock. I left the group and got the bike back to the truck and dumped the oil, filter and flushed the motor out. I ran it and changed the oil again. It started and ran fine so I decided to meet back up with the group to try and salvage the day. Well during the frequent oil changes I apparently made the idiotic mistake of forgetting to torque the motor drain plug. I got to the parking lot and started it up and while it was idling warming up for a few minutes I guess the plug fell out and so did the oil. I only took off a couple of feet and it started to die so I killed it and it felt like it . I let it cool down and thankfully was able to kick it through slowly. I put the plug back in filled it wit oil. It was rough to kick but eventually I got it started and it runs OK and kicks over normal. I hear a new noise in the motor sort of a whizzing. It sounds like its coming from the counter balancer. I still need to change the oil and check the filter again but do you think I did any major harm? I remember hearing about other having problems with a noise from the counter balancer shaft, what is it and how do I fix it? Any help or advice would be much appreciated.