I dropped a valve (at idle) on my 06 YZ450, and I have a few questions:
1. How worried should I be about damage to the bottom end? I feel like I should be okay because it happened at idle.
2. If the bottom end were to fail (I've never had this happen before) what are the chances that it will cause damage to my brand new top end if I take my chances with question 1?
3. When i initially took it apart. The shim and retainer for the valve which dropped were not there. I've pulled the left side cover and fished around with a pen magnet, and found one piece of metal which may account for about 10% of what disappeared. I found a good deal of metal flakes in the oil filter, but that probably only accounts for another 1%. I drained the oil into a common drain pan, I may fish around in there with the magnet. Anywhere else i should look? Any tips for this situation?
Any help is appreciated.