The 2021 Kawasaki Ninja 400 has 1 NHTSA recall campaign affecting an estimated 1,770 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 1 complaint with NHTSA, most often about the power train. Last updated July 5, 2026.
Recall campaigns
ENGINE AND ENGINE COOLING20V7740002020-12-111,770 affected
Defect
Kawasaki Motors Corp., U.S.A. (KMC) is recalling certain 2021 Z400 ABS (ER400D), Ninja 400 (EX400H) and Ninja 400 ABS (EX400G) motorcycles. The strength of the camshaft chain tensioner may be insufficient due to improper heat treatment, possibly causing it to be damaged.
Consequence
A damaged camshaft chain tensioner can cause the engine to stall, increasing the risk of a crash.
Remedy
KMC will notify owners, and dealers will replace the camshaft chain tensioner, free of charge. Note: Owners are advised to not ride their motorcycles until the repair has been completed. The recall began December 21, 2020. Owners may contact KMC customer service at 1-866-802-9381. KMC's number for this recall is…
Complaints by component
POWER TRAIN
1
1crashes
Total complaints1
What owners report
Verbatim reports filed with NHTSA, lightly edited for readability and with personal
information removed.
“This issue has been documented on hundreds of kawasaki ninja400 motorcycles ranging from 2019 to 2023. The clutch will malfunction and slip with miles as low as 200. I personally have a ninja 400 from the dealership with 7000 miles on it and the clutch is indeed slipping abnormally and this has…”
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL,
FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2021 Kawasaki Ninja 400 as of
July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page
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