He started practicing Muay Thai at the age of 13 with his father and elder brother at the Sor Banchongsak training camp under the guidance of Banchong Ngarm-ket.

After 4–5 bouts, he changed camp and fought under the name of Dieselnoi Sor Vorakulchai at Sri Ratcha, Chonburi.

His next fight was at the World Free-style Martial Arts Championship held in Bangkok, in April 1982, taking the 135 lb division in the finals against Shinobu Onuki from Japan.

[1] Then Dieselnoi would fly to America and face the American kickboxer John Moncayo, who was given a 5 kg advantage on the scale, in a modified rules fight (no elbows).

[6] After being the champion for four consecutive years, he was eventually stripped from his 135 lb Lumpinee title and forced to retire because there was nobody in the weight division left to contest the belt.