Teams › Jurupa Valley
Factory Karts Shifters and the FZ program
Billy Musgrave's chassis brand; shifter-focused team at PKC.
The short version
Who Factory Karts is
Follows the FZ shifter program. ProKart Challenge wins went 1, 5, 7 from 2024 to 2026, and podiums 2, 9, 15. In 2026 it took 4 of the 6 FZ125 Senior wins.
In 2026 it ran 37 finals across COTF America, ProKart Challenge and Tri-C Karters, with 7 wins and 16 podiums. Its biggest classes were Shifters (26), KA100 Sr (6), KA100 Jr (4).
Three seasons, three series
Factory Karts results, 2024 to 2026
Finals entries, wins and podiums where we can link a driver to the team, from official results. Grey cells are years we can only partly see.
| Series | 2024 | 2025 | 2026 |
|---|---|---|---|
| COTF AmericaNational, mostly K1 | –Series started in 2026 | –Series started in 2026 | 1finals in 1 of 9 rounds 0 wins0 podiums |
| ProKart ChallengeSKUSA regional | 5finals in 5 of 6 rounds · tent up to 4 spaces 1 win2 podiums | 13finals in 6 of 6 rounds · tent up to 10 spaces 5 wins9 podiums | 32finals in 6 of 6 rounds · tent up to 6 spaces 7 wins15 podiums |
| Tri-C KartersClub racing + IKF GN | –None we can see | –None we can see | 4finals in 2 rounds 0 wins1 podium |
| SuperNatsLas Vegas, November | 18spaces on the pit map | 12spaces on the pit map | 9spaces on the pit map |
How to read it: COTF and Tri-C 2026 list every driver’s team, so those numbers are complete. ProKart Challenge results don’t, so we link drivers through same-year race reports and see about half the 2026 field and a third or less in 2024–25. Tent size on SKUSA’s pit maps is the steadier measure there. Tri-C 2024–25 shows only what we could link, so read those as “at least”.
What they race
Factory Karts classes in 2026
Finals entries by class across COTF, the ProKart Challenge and Tri-C.
SuperNats tent, every year we have a map
Spaces on SKUSA’s SuperNats pit maps. No event in 2020.
What they offer
Programs, people and equipment
We don’t print team prices. Ask the team directly.
What people say
Reviews
One KartPulse thread, mixed. If you’ve raced with Factory Karts, tell us what it was like.
Before you sign up
Questions to ask Factory Karts
- What’s included in a race weekend: kart, engine, tires, fuel, a mechanic, data, coaching?
- How many drivers does one mechanic look after at a round?
- Which classes and series will you run in 2027, and is there a seat in ours?
- What does a full season cost, and what’s billed on top: tires, engine rebuilds, crash damage?
- Can we watch a weekend under your tent before we commit?
Contact Factory Karts
Website, socials and phone
Sources: COTF America official classifications; Speedhive results for the ProKart Challenge and Tri-C; RaceSelect entry lists; eKartingNews race reports; SKUSA pit maps; the team’s own site and socials. Counted Oct 24, 2026. Not paid, not a partner. Is something wrong, or is there something you’d like featured? Email kartingsocal@gmail.com. All teams: SoCal karting teams.