The worst 2021 Honda CMX300 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
Recalls 2
Steering: critical fasteners
- What is wrong
- Honda (American Honda Motor Co.) is recalling certain 2017-2023, 2025 CMX500, 2017-2023, 2025-2026 CMX300, and 2025 Honda SCL500 motorcycles. The handlebar lock screw may loosen and detach.
- Risk
- A detached screw may lodge between the frame and stem, interfering with steering and increasing the risk of a crash or injury.
- Remedy
- Dealers will replace the lock screw and apply thread lock, free of charge. Owner letters were mailed September 29, 2026. Owners may contact Honda's customer service at 1‑866‑784‑1870. Honda's number for this recall is KU8. This recall expands previous the federal safety agency recall number 26V146. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on beginning August 4, 2026.
Recall number 26V500000 · Recall details
Exterior lighting
- What is wrong
- Honda (American Honda Motor Co.) is recalling certain 2020-2021 Super Cub C125, CB500X, CB650R, CBR300R, CBR500R, CBR650R, Rebel 300, Rebel 500, Monkey, 2020 CRF250L, GROM, 2021 CRF300L, and CB500F motorcycles. The rear reflector lens may not reflect brightly enough. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
- Risk
- A dim rear reflector may reduce the visibility of the motorcycle to other drivers, increasing the risk of a crash or injury.
- Remedy
- Dealers will replace the rear reflector, free of charge. Owner notification letters were mailed July 7, 2021. Owners may contact Honda customer service at 1‑866‑784‑1870. Honda's number for this recall is KM3.
Recall number 21V382000 · Recall details
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Questions about the 2021 Honda CMX300
Is the 2021 Honda CMX300 reliable?
Owners have filed 0 complaints about the 2021 Honda CMX300.
What is the most common problem with the 2021 Honda CMX300?
There are not enough complaints to tell.
How many recalls does the 2021 Honda CMX300 have?
2 recalls, covering steering and exterior lighting.
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