Anonymous
Favorite Answer
When it was new maybe 7 or 8.
When people ask "how much HP does my many years old whatever get?" they forget that HP drops as engines age. For a 36 year old 80cc dirtbike you'll be lucky if it makes 6.
Bertsta
About 7bhp
Ian K
A couple.... depending on state of the motor.
mermeliz
According to this user, his dyno test, before his mods, showed it to have around 7 hp.
https://thumpertalk.com/forums/topic/237848-xr80-dyno-results/
Another post shows 4.5 hp: /question/index?qid=20070509181853AA92D4Z
Tim D
8.5bhp on a good day.