Hey man,
Zombie had posted in one of the other boards that the af-18-af28 are the closest. The others do have different specs, parts.. ever slightly but different..
For what you'll spend hunting a dio engine, etc. you can get a replacement crank, bearings, etc. ALOT cheaper. Besides, if you wanting another engine to buy, why not order another zx engine?.
Are you certain the crank is broke?
I'd rebuild...IMHO....
YES, it may cause a headache, YES you may cuss the heavens, YES, you may want to burn/hit the scooter w/hammer.
If you will look at MY threads in here, i have pics posted, Even broke a crankshaft. I can feel your pain my friend,
trust me, a cpl of us are still around able to help. The 1st time was so fkn fun, a m.fkr at the same time. That satisfing feeling when she fires on 1-2 kicks can't be beaten + look at the skills you gained, the
labor cost you have saved.