I wonder if changing the ergos on the bike (riding position) will help. Or maybe the suit isn't fitting you well and there's a lot of material bunched up near the neck while in riding position. Can probably be fixed with some leather work.
How's the 749 treating you? At 5'7" myself, I'm finding it hard to flat foot and walk it up even the slightest incline unless I'm off the bike.
I haven't been able to flat foot a bike since... well my 50cc scooter. lol
I have to get on and off with the kickstand down... then a tip toe push up to verticle... then it is all tip toes from there.
Backwards... lol... I get off and push.