"race engine" HELP!!

[Warrior615]

I have a older sporster frame dont know much about engines can you help? These are the numbers on the left side of ENGINE *SS11T201254*

 

[Breeze3at]

Likely an S&S block. Try this link: https://itstillruns.com/identify-ss-cycle-motors-8781177.html

 

[dolt]

Agree with Breeze on S&S; call S&S.