I did a long Karelia tour about a week after you, but i went around on the north side of lake Ladoga because a friend has a summer house there.
I saw that you chose to go south around lake Ladoga.
With your street bike, be glad that you did ..
A long part of that northern stretch is a gravel road that can rattle any bike to pieces in no time!
I am amazed that my V-strom survived without falling apart.
A very beutiful part of Karelia, but clearly has the worst gravel "wash board" roads i have experienced, ever.
Too bad that the time of our tours didn´t match up, maybe next time?