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| 4/24/2021 | Sheridan Speedway - Sheridan, WY Sponsored by Big Horn Mountain Radio Network Dirt Mini Trucks, Dwarf, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 3rd | - | - | 13th (DNF) |
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| 4/25/2021 | Sheridan Speedway - Sheridan, WY Sponsored by Rocky Mountain Ambulance Quarter Midgets, Dirt Mini Trucks, Junior Honda, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 5th | - | - | 5th |
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| 5/16/2021 | Sheridan Speedway - Sheridan, WY Street Stock Special - Sponsored by M & K Rentals Quarter Midgets, Dwarf, Junior Honda, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 3rd | - | - | 8th (DNF) |
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| 5/23/2021 | Sheridan Speedway - Sheridan, WY Sponsored by Sheridan Motors and Jimmy Johns Quarter Midgets, Dirt Mini Trucks, Junior Honda, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 5th | - | - | 7th (DNF) |
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| 6/6/2021 | Sheridan Speedway - Sheridan, WY Mod 4 Special - Sponsored by Sheridan Driveline Services and Matco - - Kids Bike Races Quarter Midgets, Dwarf, Junior Honda, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 4th | - | - | 7th |
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| 6/12/2021 | Big Sky Speedway - Billings, MT O' Reilly Auto Parts Sprint Night 360 Sprints - Winged: ASCS Frontier Region IMCA Modified, IMCA Sport Compact, WISSOTA Midwest Mods, WISSOTA Super Stock | Results | | Ken Harmon (IMCA Modified) | 8th (DNF) | - | - | 16th (DNF) |
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| 6/20/2021 | Sheridan Speedway - Sheridan, WY Sponsored by A-Line Roofing & Exteriors and Ted's Towing 360 Sprints - Winged, Quarter Midgets, Dirt Mini Trucks, Junior Honda, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 5th (DNF) | - | - | 11th (DNF) |
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| 6/25/2021 | Big Sky Speedway - Billings, MT Mountain States Modified Tour Night 1 Races Start @ 7pm MODS, MWM & Streets IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 9th | - | - | 17th |
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| 6/26/2021 | Big Sky Speedway - Billings, MT Mountain States Modified Tour Night 2 Races Start @ 7pm MODS, MWM & Streets IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 7th | - | 10th | 21st (DNF) |
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| 6/27/2021 | Sheridan Speedway - Sheridan, WY Mountain States Modified Tour - Night 3 - Sponsored by AlphaGraphics IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 7th | - | 5th | 18th |
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| 6/28/2021 | Sheridan Speedway - Sheridan, WY Mountain States Modified Tour - Championship Night - Sponsored by Imperial Powder Coating IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 6th | - | - | 17th |
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| 7/11/2021 | Sheridan Speedway - Sheridan, WY Race of Champions - Sponsored by Farmer's Co-op and Jim Volk - Kids Bike Races - Quarter Midgets, Junior Honda, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 5th | - | - | 10th |
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| 7/25/2021 | Sheridan Speedway - Sheridan, WY ASCS Sprint Special - Sponsored by Heartland Kubota 360 Sprints - Winged: ASCS Frontier Region IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 5th | - | - | 9th (DNF) |
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| 8/1/2021 | Sheridan Speedway - Sheridan, WY Mini Stock Special - Sponsored Alpine Climate Control and Jack Wood Quarter Midgets, Dirt Mini Trucks, Junior Honda, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 6th | - | - | 13th (DNF) |
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| 8/13/2021 | Sheridan Speedway - Sheridan, WY I 90 - Night 1 - Sponsored by TireRama and Powder River Power of Sheridan Dirt Mini Trucks, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Ken Harmon (Dirt Mini Trucks) | 3rd | - | - | 3rd | | Ken Harmon (IMCA Modified) | 7th | - | - | 10th (DNF) | | Ken Harmon (WISSOTA Street Stock) | 6th | - | - | 7th |
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| 8/14/2021 | Sheridan Speedway - Sheridan, WY I 90 - Night 2 Sponsored by McDonald's Dirt Mini Trucks, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Ken Harmon (Dirt Mini Trucks) | 1st | - | - | 2nd | | Ken Harmon (IMCA Modified) | 5th (DNF) | - | - | DNS | | Ken Harmon (WISSOTA Street Stock) | 5th (DNF) | - | - | 8th |
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| 8/15/2021 | Sheridan Speedway - Sheridan, WY I 90 - Night 3 Sponsored by Sheridan Homes Quarter Midgets, Dirt Mini Trucks, Junior Honda, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | DNS | - | - | 13th (DNF) |
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| 8/22/2021 | Sheridan Speedway - Sheridan, WY CHAMPIONSHIP NIGHT!!!! -- Sponsored by Rocky Mountain Ambulance Quarter Midgets, Dirt Mini Trucks, Junior Honda, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Street Stock | Results | | Ken Harmon (Dirt Mini Trucks) | 1st | - | - | 1st | | Ken Harmon (IMCA Modified) | 7th (DNF) | - | - | 7th (DNF) |
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| 9/24/2021 | Sheridan Speedway - Sheridan, WY Fall Classic - Sponsored by Big Horn Radio Network IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 6th | - | - | 18th (DNF) | | Ken Harmon (WISSOTA Street Stock) | 7th (DNF) | - | - | DNS |
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| 9/25/2021 | Sheridan Speedway - Sheridan, WY Fall Classic - Sponsored by Sheridan Motorsports Association IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Street Stock | Results | | Ken Harmon (IMCA Modified) | 7th (DNF) | - | - | 15th (DNF) |
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