Pull engine or 'in frame' rebuild?

I'm replacing the whole top end (cylinder, piston, head) and I would like to inspect the bottom end as well to make sure it's healthy. Should I just go ahead and pull the engine and get to splitting the cases or can I leave it in the frame? Will pulling the side covers off give me a good look at the lower end in addition to checking the rod play when I replace the piston/cylinder?

The previous owner said he had the bottom end rebuilt with low hours, but the bike ate a valve so I just want to be sure all is well before putting the top end back together.

You don't have to pull the motor to check that, but if you do, it is only a little bit more work like a few oil lines and swing arm.

easiest will be just to pull the engine then uou got much more space!!!

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