The quickest version of the Monkey was the Honda Z50R.
It was released in 1979 with the higher-performance overhead cam 49cc engine capable of more power than the overhead valve unit that had been used on many other Monkey bikes previously.
source: https://silodrome.com/honda...
issued: Tuesday, November 27, 2018
updated: Tuesday, November 27, 2018
link to this page:
https://www.cmsnl.com/news/honda-monkey-z50rthe-fastest-version-of-the-original-monkey_news11695.html