Yep! The axle is the right size, at least it was on my ’78. However, I bought a puller from z1Enterprises.com anyway, I cringed at the thought of damaging my axle when a few dollars could be spent on a puller. And my rear wheel could stay on….
And, you’ll need something to hold the rotor while removing the center bolt (its’ a left-handed thread!). That might be the biggest trick. See the pic below for an example of how I did it (the pic shows the wrench position for tightening, the wrench would flip over for loosening).
And since you’re starter clutch is most likely damaged, you’ll need a plan in that regard. By now you’ve read that I just took mine out for good!
Also, you’ll likely need a gasket for re-assembly…