Jack Zink

John Smith "Jack" Zink (October 17, 1928 – February 5, 2005), founder of Zeeco, Inc., was an American engineer who received 35 patents for his inventions in the field of combustion, and was also known for his achievements and contributions in business, auto racing and charitable enterprises.

By then, the company had specialized in manufacturing burners, flares, and incinerators for the petroleum and related industries.

[4] Jack also competed in the 1972 Baja 1000 [7][8] riding a Husqvarna 400 with fellow Oklahoman Vern Street.

Racing in category 8, motorcycles over 125cc's, they finished the grueling 1000 mile event in 6th place in their class and 24th overall out of 259 entries.

It was Jack's first off road motorcycle race, while his partner Vern, was a highly accomplished national caliber competitor.

In 1994 Jack agreed to host the International Six Days Enduro (ISDE) https://www.sixdays.nl/wp-content/uploads/2019/09/ISDE-1994-TULSA-OK.pdf at the rugged Zink Ranch.

Over 600 participants from all over the world competed for medals and trophies in this most prestigious off road event.

The ISDE is widely known as the "Olympics of Motorcycling" as it tests not only rider skill/stamina but also machine reliability.

[4] Jack was survived by his wife, Jan, three sons, three stepchildren and a sister, Jill Zink Tarbel.

Italics – Pole position earned by points standings or practice time.