I’m trying to figure out what year my harley engine is…the crankcase number is CAHB048624?

I have a 81 Sportster, but the engine has points and condenser, which tells me it’s from 1970 to 78. I’ve looked up case numbers at several web sites but my numbers don’t come close to what i’ve found. EEEEK! I can’t get the engine running right (it’s running rich) without knowing the right specs.

according to this website it seems you do have a 1981 motor..

http://www.techsweb.us/hdvin812000.html

CAHB048624
It tells you that you have a XLH (CA)
1000 Ironhead XL (H)
1981 (B)
and 048624 is just the sequential number