I dont know any of this bikes recent build history or owner? and I am not quite sure of any of you blokes either
But, I think his/hers bike presentation is as sweet as. I love the look of it.
It --IS-- a 1975 NEW GENERATION frame(it will have prefix #321)
1975 MC400's were all "U" type four speeds.
This one --IS-- fitted with a 5 SPEED 76 or 77 AW 400 Engine(no numbers supplied in listing, close or wide ratio?). It doesn't have the under engine rear chain tension-er fitted, so it is more likely to be a 76 Engine.
It has the makings of one sweet pre78 flat tracker, or for that matter if you wanted to? you could slip a 77AW Swinging arm in it. A set of 77AW fork stanchions and dampers. Rework the dampers the "Jim Page Way" Set travel at 9". Shave the seat foam down a bit if you are vertically challenged in the leg department.
And Wallah! your ass would be sitting on one sweet Pre78 open motocross mount.
I am setting one up also as a 5 speed pre78 Flat tracker.
A simple procedure to recycle one of Maico's worst models into a very competitive and sexy looking racer.