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| 5/5/2021 | Stuart Speedway - Stuart, IA Bill Davis Memorial 600cc Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact, IMCA Mod Lite | Results | | Spencer Nelson (600cc Modifieds) | 5th | - | - | 10th |
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| 5/7/2021 | Hancock County Speedway - Britt, IA Midwest Insulation / Central States Agency Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, 600cc Modifieds, Sport Compact | Results | | Spencer Nelson (600cc Modifieds) | 4th | - | - | 2nd |
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| 5/26/2021 | Stuart Speedway - Stuart, IA Weekly Racing 600cc Modifieds, Dirt Pro Trucks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Spencer Nelson (600cc Modifieds) | 1st | - | - | 3rd |
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| 5/31/2021 | Stuart Speedway - Stuart, IA Whole Hog 50 600cc Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Spencer Nelson (600cc Modifieds) | 5th | - | - | 9th |
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| 6/16/2021 | Stuart Speedway - Stuart, IA Dynamic Drivelines Dirt Duel 600cc Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Spencer Nelson (600cc Modifieds) | 6th | - | - | 11th |
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| 6/17/2021 | Kossuth County Speedway - Algona, IA Outlaw Mini Mod & Weekly IMC Racing B Modifieds, Street Stocks, 600cc Modifieds, Enduro, IMCA Modified, IMCA Hobby Stock, IMCA Sport Compact | Results | | Spencer Nelson (600cc Modifieds) | 4th | - | - | 18th (DNF) |
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| 6/18/2021 | Marshalltown Speedway - Marshalltown, IA RBF Electric $400.00 to Win IMCA Hobby Stocks Dwarf, Dirt Pro Trucks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, Sportsman Dwarf | Results | | Spencer Nelson (Sportsman Dwarf) | 6th | - | - | 10th |
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| 6/19/2021 | Boone Speedway - Boone, IA Saturday Night Series Weekly #10 Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Mod Lite | Results | | Spencer Nelson (Dwarf) | 2nd | - | - | 22nd (DNF) |
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| 6/25/2021 | Chateau Speedway - Lansing, MN Wissota Midwest Mod vs. Usra B Mod Challenge Event Night 1 Winged Outlaw, USRA B-Mods, USRA Modifieds, WISSOTA Midwest Mods, WISSOTA Pure Stock, WISSOTA Street Stock, WISSOTA Hornet | Results | | Spencer Nelson (Winged Outlaw) | 4th | - | - | 7th |
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| 7/1/2021 | Stuart Speedway - Stuart, IA Ron Little Memorial IMCA Modified: Midwest Madness Tour 600cc Modifieds, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Spencer Nelson (600cc Modifieds) | DNS | - | - | DNS |
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| 7/11/2021 | Mason City Motor Speedway - Mason City, IA Joel Showalter Memorial Presented by Window World 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Spencer Nelson (600cc Modifieds) | 3rd | - | - | 15th (DNF) |
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| 7/16/2021 | Sports Park Raceway - Fort Dodge, IA Summit USRA Weekly Racing Series B Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Spencer Nelson (USRA Tuners) | 5th (DNF) | - | - | 11th (DNF) |
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| 9/4/2021 | Poplar Grove Speedway - Kamrar, IA Track Points Race/CIPKA Series Points Race Junior Class, Junior Champ, Winged Outlaw, Adult Open, Rookie Class, Dirt Cage Kart Junior 2, Cage Jr. 2 Clone, Flat Adult Clone, Sportsman Midget, Unrestricted Box Stock, Flat Adult Clone Heavy, 500 Winged Open Outlaw, Kid Karts Dirt, LO 206 Dirt Karts, Asphalt Sprint - LO206 Junior, Asphalt Sprint - Junior Sprint, LO 206 Cage Adult Winged, LO 206 Cage Cadet Winged, Flat Jr. 1 Clone Heavy, Flat Jr. 2 Clone Heavy, Predator Maxxis | Results | | Spencer Nelson (Predator Maxxis) | 5th | - | - | 9th |
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| 9/5/2021 | Poplar Grove Speedway - Kamrar, IA Track Points Race/CIPKA Series Points Race Junior Class, Junior Champ, Winged Outlaw, Adult Open, Rookie Class, Dirt Cage Kart Junior 2, Cage Jr. 2 Clone, Flat Adult Clone, Unrestricted Box Stock, 125 Yamaha, Flat Adult Clone Heavy, Kid Karts Dirt, LO 206 Dirt Karts, Asphalt Sprint - LO206 Junior, LO 206 Cage Adult Winged, LO 206 Cage Cadet Winged, Flat Jr. 1 Clone Heavy, Flat Jr. 2 Clone Heavy, Predator Maxxis | Results | | Spencer Nelson (Predator Maxxis) | DNS | - | - | 3rd |
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| 9/19/2021 | Poplar Grove Speedway - Kamrar, IA Track Point Race/Season Championships Junior Class, Junior Champ, Winged Outlaw, Adult Open, Rookie Class, Dirt Cage Kart Junior 2, Cage Jr. 2 Clone, Flat Adult Clone, Sportsman Midget, Unrestricted Box Stock, 125 Yamaha, Flat Adult Clone Heavy, Kid Karts Dirt, LO 206 Dirt Karts, Asphalt Sprint - LO206 Junior, LO 206 Cage Adult Winged, LO 206 Cage Cadet Winged, Flat Jr. 1 Clone Heavy, Flat Jr. 2 Clone Heavy, Predator Maxxis | Results | | Spencer Nelson (Predator Maxxis) | 2nd | - | - | 2nd |
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| 9/25/2021 | Newton Kart Klub - Newton, IA NKK King of the Corn Rotax Micro Max, Mini 60, Tag Cadet, Junior 1 Heavy Dirt Karts, Animal Lites, Adult Open, Adult Medium, Yamaha Open, Junior Kohler Cage, Junior Midget, Sportsman Midget, Comer 50CC, Briggs 206, Kid Karts, 250 yamaha, Champ Kart, Junior 1 Lites Asphalt Karting, Junior 3 Lites Asphalt Karting, Junior Camp Asphalt Karting, Senior Camp Asphalt Karting, Open Asphalt Karting, Junior 1 Medium Asphalt Karting, Junior 1 Heavy Asphalt Karting, Junior 1 Animal Asphalt Karting, Junior 2 Medium Asphalt Karting, Junior 2 Heavy Asphalt Karting, Junior 2 Animal Asphalt Karting, Junior 2 Lites Asphalt Karting, Junior 3 Medium Asphalt Karting, Junior 3 Heavy Asphalt Karting, Junior 3 Animal Asphalt Karting, 125 Winged Outlaw | Results | | Spencer Nelson (Junior Midget) | 8th | - | - | 8th | | Spencer Nelson (Junior 1 Lites Asphalt Karting) | 10th | - | - | 10th |
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| 10/9/2021 | Golden Spike Speedway - Blue Earth, MN Harvest Bash Winged Outlaw, Adult Open, Adult Heavy, Adult Lites, Rookie Class, Junior 2 Super Stock, Flat Adult Clone Heavy, 250 Winged Outlaw Heavy, 500 Winged Open Outlaw, Kid Karts Dirt, 125 Winged Outlaw, Flat Jr. 1 Clone, Predator Maxxis | Results | | Spencer Nelson (Adult Open) | 3rd | - | - | 4th |
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