This is the most crucial production detail. After 13 episodes, lead actor (Takeshi Hongo) broke both his legs in a motorcycle crash during filming.
If you're interested in watching the original Kamen Rider series with English subtitles, there are several options available: Kamen Rider 1971 - 1973 -English Subbed-
Would you like a sample opening paragraph for this imaginary essay? The Definitive Guide to Kamen Rider 1971 -
(Hongo): Known for the "Power" style and the iconic "Rider Kick." Kamen Rider 2 Kamen Rider 1971 - 1973 -English Subbed-