NHTSA complaint: 2025 HONDA CB1000SP — SUSPENSION
Subject: Suspension Defect Report â Rear Shock Spring Rate / Stability Hazard To Whom It May Concern, I am submitting a safety defect report concerning my 2025 Honda Hornet SP1000. The motorcycle is equipped with Ãhlins suspension, and from new, the rear suspension has exhibited unsafe behavior due to an inappropriate spring rate. Safety-related issues observed: The rear shock frequently tops out and unloads over standard road bumps, causing instability and momentary loss of traction. Tire temperature measurements after a long ride confirm a load imbalance: rear tire 99 Â°F (underheated), front tire 124 Â°F (overheated). This indicates the rear suspension is not carrying proper load, forcing excessive stress onto the front end. The motorcycle becomes unpredictable mid-corner and during throttle transitions because the rear fails to remain planted. The resulting instability poses a clear risk to rider safety on normal public roads. I weigh approximately 150 pounds, and at this weight the stock rear spring rate is excessively stiff. The suspension is effectively tuned for a much heavier rider, which makes the motorcycle unsafe for a significant portion of its intended market. Requested action: That NHTSA investigate this suspension tuning defect to determine whether it constitutes a broader safety concern requiring manufacturer remedy or recall. Respectfully submitted, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(
National Highway Traffic Safety Administration — Office of Defects Investigation