I am in the midst of detailing and repairing a split left frame rail on a 750 K0 frame. I have drilled the drain holes in the lower frame rails that were supposed to be there. I noticed the frame area around the swingarm pivot have openings in the sides and I'm not seeing a way for them to drain. I plan to ride this one and expect at some time to need to wash it or get caught in rain.
I did wash the frame at the car wash after I took the bike apart and it did trap water in the main upper tube behind the neck. I know that I wont be doing that anytime soon but it got my attention.
Does anyone have experience with this? Just wondering.