Thank you Zulfiqar bhai...
This car had CB50 stock and replaced with CB23 by some in past...
What is the best way you propose? Can CB23 be turbo-ed? Good on bad idea? That's the last option if CB50/60/80 aren't found...
Non-Daihatusu engine mods is not option as I want to restore close to original and not a heavy footer nor into drag race mania.
Thanks sincerely again and looking for your guidance.
Kind regards