While attending the auction of the site of the former Triumph factory to buy the site for house construction, Bloor bought the collapsed Triumph brand in 1983. After sub-licensing the brand for a period, he invested over £80 million into rebuilding the marque, opening the new Hinckley factory in 1991. After a factory fire in 2002 stopped production the factory was rebuilt, and now produces 46,000 motorcycles per annum.

Bloor’s first job was as a trainee plasterer for a local building contractor. Two years later he set up his own business and began building his first house before he was 20. His building company, Bloor Homes, is now one of the largest privately owned house builders in the UK, and has contributed to the successful regeneration of the East Midlands. In 2002, housing sales reached 1,870 making Bloor Homes then the largest housebuilder to be owned by one man.

In 2016, Bloor received the Diamond Jubilee Trophy on behalf of all the staff at Triumph Motorcycles. The Trophy has only been given out four times previously.

J.S. Bloor donated £400,000 to the Conservative Party in the 2017 general election. In the 2019 general election donations of £750,000 and £200,000 were made to the party and £12,000 to Conservative MP Andrew Bridgen.

In 2018, Bloor was paid a £7 million dividend by Bloor Holdings, the company that owns Bloor Homes and Triumph.