This is deluxe model. It has a recessed hole so the screw end has somewhere to call home.
My OEM fan housing didn't align as nicely as the feller who thought this idea up. Used clips to help 'space' the motor/housing.
Like this. FJR1300 fairing clips worked perfect.
After careful consideration, decided to 'unfold' the ridge to gain purchase on some
some metal for a new hole. Yes, I know this reduced the housing strength. It may
even crack sometime during the next 40 years...
Ready for the paint department.
I have no real fabrication capabilites. Maybe someday a Tig welder, brake, etc...
For the record
1979-1982 kz1300's used a 4 blade fan part # 59041-1001
1983-1988 used a 7 blade fan # 59041-1051
and of course the fan motors are different part numbers so it may not be a direct fit.
When i did my conversion , I bought a fan from a ZRX1200 and cut the shroud and welded it on to the to the mount ring. After testing the output, I would guess the 7 blade fan put out 30-40 % more air than the 4 blade fan.