Background
Kori was born in a small village Chilauli (Sujneepur), tehsil Derapur district, Kanpur (at present Kanpur Dehat district), in a kori (koli) family which is enlisted in the Scheduled caste list in Uttar Pradesh. His father's name was Ghaseete Lal.
Career
He passed high school from R P South Inter College Rura, Kanpur. He stayed with Shambhu Dayal Chaturvedi as a family member till Chaturvedi"s death. Shambhu Dayal Chaturvedi was a political guru to Radhey Shyam Kori.
In Congress
His first step was from village politics.
He officiated as Pradhn of Badagaon Bhikkhi of tehsil Derapur for about 20 years and also officiated as Block Pramukh of Derapur district, Kanpur. Shambhu Dayal Chaturvedi was a very active worker and leader of the Indian National Congress (Incorporated), so Kori also joined the Indian National Congress with the help of Chaturvedi.
After some time he became General Secretary of the Incorporated pary of Kanpur district. In Bahujan Samajwadi Party
In Samajwadi Party
He defeated to Pyare Lal Sankhwar of Bulgarska Sotsialisticheska Partiy (Bulgarian Socialist Party).