The PROX Cam Chain, manufacturer part number 31.1348 and vendor part number 31.1348, is a precision-engineered replacement timing chain for select Honda CRF250R and CRF250RX models. Manufactured in Japan by Borg Warner, this cam chain is designed to meet original equipment manufacturer specifications for dependable fitment, consistent timing, and long-term engine performance.
Built with a strong M-Type chain design, the PROX cam chain features specially heat-treated pins along with advanced pin and link connections. These construction details help provide the strength, durability, and reliable operation required in high-performance four-stroke motorcycle engines. It is suitable for replacing a worn or damaged cam chain during scheduled engine maintenance or rebuild work.
Fitment includes the 2018–2023 Honda CRF250R, with application coverage for the 2019–2022 Honda CRF250RX. Always verify the motorcycle model and model year before installation. The PROX 31.1348 cam chain is intended as a direct replacement component for compatible applications and supports accurate valve timing when installed according to the manufacturer's service procedures.
Features:
- Manufactured in Japan by Borg Warner
- Designed to meet original equipment manufacturer specifications
- Strong M-Type chain construction for performance and durability
- Specially heat-treated pins help improve chain strength and service life
- Advanced pin and link connections support reliable engine operation
- Fits 2018–2023 Honda CRF250R models
- Fits 2019–2022 Honda CRF250RX models
- Brand: PROX
- Manufacturer part number: 31.1348
- Vendor part number: 31.1348
Fitment:
2018 Honda CRF250R
2019 Honda CRF250R
2019 Honda CRF250RX
2020 Honda CRF250R
2020 Honda CRF250RX
2021 Honda CRF250R
2021 Honda CRF250RX
2022 Honda CRF250R
2022 Honda CRF250RX
2023 Honda CRF250R
2023 Honda CRF250RX
2024 Honda CRF250R
2024 Honda CRF250RX
2025 Honda CRF250R
2025 Honda CRF250RX