The Dirt Tricks BT-51-RAW Rear Sprocket is a 51-tooth chromoly replacement sprocket designed for compatible Beta off-road motorcycles using a 520 chain. Developed by Dirt Tricks president and engineer Greg Burns, this sprocket reflects the brand’s expertise in aerospace-grade steels, advanced heat treatments, and finite element analysis (FEA) stress testing. Its minimalist design delivers high strength and dependable performance for demanding trail, enduro, and hard off-road riding.
Feature: The Dirt Tricks BT-51-RAW uses durable chromoly construction engineered to provide long service life while maintaining a weight comparable to aluminum sprockets. It is designed to be 2.5 times stronger than stainless steel and is backed by Dirt Tricks’ two-year guarantee. The raw finish provides a straightforward, functional appearance, while the precision-manufactured tooth profile supports reliable chain engagement and consistent power transfer.
Feature: This 51-tooth rear sprocket fits select Beta models, including the 2017 Beta 350 RR, 390 RR, 430 RR, and 480 RR; the 2018 Beta 250 RR, 300 RR, 390 RR, 430 RR, and 480 RR; and the 2018 Beta 300 Xtrainer. Confirm the motorcycle model, year, chain size, and original sprocket configuration before installation. The Dirt Tricks BT-51-RAW is a practical upgrade or replacement for riders seeking extended sprocket durability in demanding riding conditions.
Features:
- 51-tooth rear sprocket for 520 chain applications
- Chromoly construction engineered for high strength and long service life
- Minimalist Dirt Tricks design helps balance durability and weight
- 2.5 times stronger than stainless steel according to manufacturer specifications
- Raw finish for a functional, uncoated appearance
- Designed and engineered by Dirt Tricks using aerospace steel expertise, heat treatment, and FEA stress analysis
- Backed by Dirt Tricks’ two-year replacement guarantee
- Fits select 2017 Beta 350 RR, 390 RR, 430 RR, and 480 RR models
- Fits select 2018 Beta 250 RR, 300 RR, 390 RR, 430 RR, 480 RR, and 300 Xtrainer models
Fitment:
2013 Beta 250 RR (2T)
2013 Beta 300 RR (2t)
2013 Beta 350 RR
2013 Beta 350 RS
2013 Beta 400 RR
2013 Beta 450 RR
2013 Beta 450 RS
2013 Beta 498 RR
2014 Beta 250 RR (2T)
2014 Beta 300 RR (2t)
2014 Beta 350 RR
2014 Beta 400 RR
2014 Beta 400 RS
2014 Beta 450 RR
2014 Beta 450 RS
2014 Beta 498 RR
2015 Beta 250 RR (2T)
2015 Beta 250 RR (RE)
2015 Beta 300 RR (2t)
2015 Beta 300 Xtrainer
2015 Beta 350 RR
2015 Beta 390 RR
2015 Beta 390 RS
2015 Beta 430 RR
2015 Beta 430 RS
2015 Beta 450 RR
2015 Beta 480 RR
2015 Beta 500 RS
2016 Beta 250 RR (2T)
2016 Beta 250 RR (RE)
2016 Beta 300 RR (2t)
2016 Beta 300 Xtrainer
2016 Beta 350 RR
2016 Beta 390 RR
2016 Beta 390 RS
2016 Beta 430 RR
2016 Beta 430 RS
2016 Beta 450 RR
2016 Beta 480 RR
2016 Beta 500 RS
2017 Beta 250 RR (2T)
2017 Beta 250 RR (RE)
2017 Beta 300 RR (2t)
2017 Beta 300 RR (RE)
2017 Beta 300 Xtrainer
2017 Beta 350 RR
2017 Beta 350 RR (RE)
2017 Beta 390 RR
2017 Beta 390 RR (RE)
2017 Beta 430 RR
2017 Beta 430 RR (RE)
2017 Beta 450 RR
2017 Beta 480 RR
2017 Beta 480 RR (RE)
2017 Beta 498 RR
2018 Beta 250 RR (2T)
2018 Beta 250 RR (RE)
2018 Beta 300 RR (2t)
2018 Beta 300 RR (RE)
2018 Beta 300 Xtrainer
2018 Beta 350 RR
2018 Beta 350 RR (RE)
2018 Beta 390 RR
2018 Beta 390 RR (RE)
2018 Beta 430 RR
2018 Beta 430 RR (RE)
2018 Beta 450 RR
2018 Beta 480 RR
2018 Beta 480 RR (RE)
2018 Beta 498 RR
2019 Beta 250 RR (2T)
2019 Beta 250 RR (RE)
2019 Beta 300 RR (2t)
2019 Beta 300 RR (RE)
2019 Beta 300 Xtrainer
2019 Beta 350 RR
2019 Beta 350 RR (RE)
2019 Beta 390 RR
2019 Beta 390 RR (RE)
2019 Beta 430 RR
2019 Beta 430 RR (RE)
2019 Beta 450 RR
2019 Beta 480 RR
2019 Beta 480 RR (RE)
2019 Beta 498 RR
2020 Beta 250 RR (2T)
2020 Beta 250 RR (RE)
2020 Beta 300 RR (2t)
2020 Beta 300 RR (RE)
2020 Beta 300 Xtrainer
2020 Beta 350 RR
2020 Beta 350 RR (RE)
2020 Beta 390 RR
2020 Beta 390 RR (RE)
2020 Beta 430 RR
2020 Beta 430 RR (RE)
2020 Beta 450 RR
2020 Beta 480 RR (RE)
2021 Beta 250 RR (2T)
2021 Beta 250 RR (RE)
2021 Beta 300 RR (2t)
2021 Beta 300 RR (RE)
2021 Beta 300 Xtrainer
2021 Beta 350 RR
2021 Beta 350 RR (RE)
2021 Beta 390 RR
2021 Beta 390 RR (RE)
2021 Beta 430 RR
2021 Beta 430 RR (RE)
2021 Beta 450 RR
2021 Beta 480 RR (RE)
2022 Beta 250 RR (2T)
2022 Beta 250 RR (RE)
2022 Beta 300 RR (2t)
2022 Beta 300 RR (RE)
2022 Beta 300 Xtrainer
2022 Beta 350 RR
2022 Beta 350 RR (RE)
2022 Beta 390 RR
2022 Beta 390 RR (RE)
2022 Beta 430 RR
2022 Beta 430 RR (RE)
2022 Beta 480 RR
2022 Beta 480 RR (RE)
2023 Beta 250 RR (2T)
2023 Beta 250 RR (RE)
2023 Beta 300 RR (2t)
2023 Beta 300 RR (RE)
2023 Beta 300 Xtrainer
2023 Beta 350 RR
2023 Beta 350 RR (RE)
2023 Beta 390 RR
2023 Beta 390 RR (RE)
2023 Beta 430 RR
2023 Beta 430 RR (RE)
2023 Beta 480 RR
2023 Beta 480 RR (RE)
2024 Beta 250 RR (2T)
2024 Beta 250 RR (RE)
2024 Beta 300 RR (2t)
2024 Beta 300 RR (RE)
2024 Beta 300 Xtrainer
2024 Beta 350 RR
2024 Beta 350 RR (RE)
2024 Beta 390 RR
2024 Beta 390 RR (RE)
2024 Beta 430 RR
2024 Beta 430 RR (RE)
2024 Beta 480 RR
2024 Beta 480 RR (RE)
2025 Beta 250 RR (2T)
2025 Beta 250 RR (RE)
2025 Beta 300 RR (2t)
2025 Beta 300 RR (RE)
2025 Beta 300 Xtrainer
2025 Beta 350 RR
2025 Beta 350 RR (RE)
2025 Beta 390 RR
2025 Beta 390 RR (RE)
2025 Beta 430 RR
2025 Beta 430 RR (RE)
2025 Beta 480 RR
2025 Beta 480 RR (RE)
2026 Beta 250 RR (2T)
2026 Beta 250 RR (RE)
2026 Beta 300 RR (2t)
2026 Beta 300 RR (RE)
2026 Beta 300 Xtrainer
2026 Beta 350 RR
2026 Beta 350 RR (RE)
2026 Beta 390 RR
2026 Beta 390 RR (RE)
2026 Beta 430 RR
2026 Beta 430 RR (RE)
2026 Beta 480 RR
2026 Beta 480 RR (RE)