The rear brake is the issue. I have had two separate incidents, both involving the rear brake. The first one: I was riding around my neighborhood, and as I came down my driveway, the rear brake was squishy. The bike wasn't responding. The second incident occurred while driving at 50 mph. I was in the process of slowing down to turn when pressing the rear brake to help slow down. The brake was squishy, and the bike wasn't slowing down.
2024-2025 · 2 model years
Cfmoto 450NK Problems by year
Owners have filed 3 complaints about the Cfmoto 450NK across 2 model years, and it has 0 recalls. The 2024 has the most complaints once its age is allowed for (2). The most reported problem area is the brakes, followed by the electrical system.
- Complaints
- 3
- Recalls
- 0
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
450NK complaints by model year
Highlighted: the year with the most complaints for its age. Older vehicles have had more time to collect complaints - the Safety Index grade allows for that.
Most common 450NK problems
Latest 450NK complaints
The rear master cylinder brake. 1st: incident I had the bike for 1 day and when i took it out to test it, no rear brake. Was told rear master cylinder. So right off the bat the rear master cylinder was bad to begin with. 2nd: incident.(DATE OF EVENT: April 8th, 2026 but didn't get picked up for repair by dealership until April 17th, 2026) the replacement part they put on to replace the original went bad when it worked perfectly fine putting it up for the winter. Bike was stored inside the house not being used!...
Read the full complaint
When it went bad. How can a rear master cylinder go bad just sitting there out of the weather elements?? I don't trust any replacement parts they will get. They have had my bike for 2 almost 3 weeks now. Looking at many many forums, many others are having the same exact issue I am with their bikes being held for 5weeks or more. One gentlemen said he bought in 2024 a 450nk for his wife and an 800nk BOTH had the same issue twice. WHY is there no recall for this problem? Does someone have to die for changes to happen?
The contact owns a 2024 CFMoto UForce. The contact stated that while driving at an undisclosed speed or while the vehicle was parked, the interior cab of the vehicle overheated. There was no warning light illuminated. The contact stated that the passenger-side of the vehicle became excessively hot. The contact believed that the failure was due to the exhaust system significant proximity to the battery. The contact was concerned that the battery could potentially explode due to the excessive heat. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 1,012.
Questions about the Cfmoto 450NK
Which Cfmoto 450NK years have the most problems?
What are the most common Cfmoto 450NK problems?
Across every model year, owners report problems with the brakes (2), electrical system (1), engine & cooling (1) most often.
How many recalls does the Cfmoto 450NK have?
NHTSA lists no recalls for any Cfmoto 450NK model year on file.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data