Triumph Recalls 1,560 TF 450 Motocross Bikes After Engine Defect Tied to Rider's Broken Bone

Triumph Motorcycles is recalling about 1,560 of its TF 450 competition motocross motorcycles in the United States after federal safety regulators said a defective engine component can seize without warning and cause riders to crash. The recall notice, posted by the U.S. Consumer Product Safety Commission on September 10, covers 2025 and 2026 model-year TF 450-C, TF 450-E, TF 450-X and TF 450-RC Edition motorcycles, all sold in a Jet Black and Pure White color scheme through authorized Triumph dealers.

The agency said the engine's rocker arm can seize or stick, which in turn can leave the exhaust valves stuck open or cause them to break, a failure that can bring on a sudden loss of engine performance while a rider is on the track. Triumph has received 12 reports of the rocker shaft sticking or seizing, or of related exhaust-valve damage, and one report of an injury: a broken bone. No deaths have been reported.

The numbers

About 1,560 of the affected motorcycles were sold in the United States, with roughly 171 more sold in Canada, according to CPSC records. The bikes were sold nationwide from January 2025 through July 2026 for between $10,000 and $15,000, placing them well above the price of most consumer dirt bikes and squarely in the market for serious amateur and professional racers. Affected units fall within a specific range of vehicle identification numbers, and owners can look up their own VIN through Triumph's own recall lookup tool to confirm whether their motorcycle is included.

The recall was filed under the CPSC's Fast Track Recall Program, which allows a manufacturer that voluntarily reports a defect and proposes an acceptable remedy to move directly to a public recall, typically within about 20 working days, rather than face a lengthier agency investigation that can stretch past 90 days. The designation indicates Triumph brought the defect to regulators' attention itself rather than waiting for CPSC to act on outside complaints.

How Triumph got here

The recall lands on a motorcycle line that represents one of Triumph's biggest bets in years. The British manufacturer spent roughly five years developing a return to motocross racing, a category it had not competed in for half a century, working with 15-time AMA Supercross and Motocross national champion Ricky Carmichael from the earliest stages of the project. Triumph unveiled the TF 450-RC in October 2024 as the flagship of a new off-road range built specifically for closed-course competition, following an earlier 250cc model that marked the brand's first return to the class in 2024.

Those bikes, including the version still listed on Triumph's website, are pitched to serious racers rather than casual trail riders, built around a race-tuned four-stroke engine and chassis developed alongside professional test riders. A defect surfacing in the very engine component central to that pitch is a setback for a product line Triumph has spent years positioning as evidence the brand could compete with established Japanese and Austrian motocross manufacturers.

Who is affected

Because the recalled motorcycles are sold exclusively as "closed course competition" machines rather than street-legal bikes, the affected population skews toward competitive and serious recreational racers who ride at organized tracks and events, along with the network of authorized Triumph dealers now handling inspections. The CPSC's notice does not indicate the defect is tied to a particular region or dealer group, and the VIN range covers motorcycles built across the 2025 and 2026 model years and sold nationwide.

Trade coverage of the recall, including reporting by RideApart and Motorcycle.com, notes that Canadian regulators posted an equivalent recall before the CPSC's U.S. notice went live, meaning some owners may have already heard about the defect from Triumph directly or through owner forums before the formal American announcement.

What officials and the company are saying

Neither Triumph nor the CPSC has issued a separate public statement beyond the formal recall notice itself, which is standard for a Fast Track recall of this size. The notice's language is blunt about the stakes:

The engine rocker arm on the recalled motorcycles can seize or stick and the exhaust valves can remain open or break, posing a risk of serious injury or death from a crash hazard.

That wording, drawn directly from the CPSC's recall filing, reflects the agency's standard hazard classification for a defect capable of causing sudden loss of control. The one confirmed injury — a broken bone — is described in the notice without further detail on the rider's circumstances or the severity of the crash.

What owners should do next

The CPSC and Triumph are advising owners to stop riding the affected motorcycles immediately rather than wait for a scheduled dealer visit. Consumers should:

• Check their motorcycle's 17-digit VIN, located on the steering head plate, against the affected range through Triumph's recall lookup page or by contacting a dealer directly.
• Stop using the motorcycle until an authorized Triumph dealer has inspected the engine.
• Schedule a free inspection and, if necessary, a full cylinder head replacement at any authorized Triumph Motorcycle dealer.
• Contact Triumph directly at 888-284-6288 (8:30 a.m. to 6 p.m. ET, Monday through Friday) or by email at [email protected] with questions about the remedy or repair scheduling.

The repair itself — a full cylinder head swap — is being performed free of charge, and Triumph has not indicated any additional cost or trade-in incentive tied to the recall, unlike some CPSC actions that pair a repair with a store credit or replacement product. Owners are not being asked to return the motorcycles or destroy any parts; the fix is intended to keep the bikes in service once the engine has been inspected and, where necessary, corrected.

The recall does not affect Triumph's separate line of street-legal adventure and dual-sport motorcycles, nor its 250cc motocross model, based on the VIN range and model list published by the CPSC. Riders with questions about whether a specific used or dealer-floor unit falls inside the affected range are directed to Triumph's own lookup tool rather than relying on model year alone, since the recall applies to a defined band of VINs within the 2025 and 2026 production run.