That is called a connecting rod, not a cam shaft. The bearing that failed on you is the wrist pin bearing, also known as the small end bearing, piston pin bearing, or gudgeon pin bearing. All the same parts, just different names for them.
Unfortunately the teeny rollers in the stock bearings are known to be soft and fail easily.
I am sad to say that is what you are dealing with now.
You may be able to get away with holding the engine up-side-down and rinsing it out well with kerosene, but I wholeheartedly recommend splitting the cases and doing a very thorough inspection of every last nook and cranny. Also unfortunately when this happens metal debris is known to work it's way into the crank pin bearing, also known as the big end bearing. It is on the other end of the connecting rod, in between the flywheels.
The only way to inspect this bearing is to press apart the flywheels to gain access to it.
Alot of folks get lucky and this bearing actually survives a wrist pin bearing failure, but I lean towards the side of caution and warn that not all are this lucky.
I leave the choice to you.
Take a calculated chance that the crank pin bearing is ok and simply replace the top end after rinsing out the crankcases (or better yet, splitting them and inspecting them), or a replacement engine is in order.
It is much cheaper to buy a whole new replacement engine than it is to buy all the parts needed to rebuild a whole engine.
Either way, I wish you the best of fortune!
