If You Ride a Triumph Daytona 660, There Might Be An Engine Failure Issue

All 2024 and 2025 Triumph Daytona 660s could have their engines face oil starvation under certain circumstances, but it's a problem that can be fixed.

By: Janaki Jitchotvisut

Sep 2, 2025 at 8:52am ET

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Two words you never want to see anywhere near each other in a sentence are "engine" and "failure." And yet, unfortunately, that's one possible outcome of an issue that Triumph Motorcycles America is currently recalling all of its 2024 and 2025 Daytona 660s for.

According to existing factory records, all 2024 and 2025 Daytona 660s may have insufficient lubrication within their crankshafts and bearings. Under the specific circumstances of aggressive deceleration causing air to enter the oil system due to heavy sloshing, the pressure within the engine can drop, and the oil can cease to flow where it should in order to provide appropriate lubrication.

Even worse, no warnings will be given by the bike to the rider to indicate that there's a problem. Instead, what could happen is premature engine damage and degradation, and the eventual possible risk of a crash if this condition remains untreated.

Around 1,929 bikes are included in the recall population in the US, which represents 100 percent of these bikes. So far, no fatalities or injuries related to this issue have been reported. However, at the time that Triumph filed its recall paperwork with the US National Highway Traffic Safety Administration (NHTSA), it reported receiving 13 consumer complaints, 27 field reports, and 18 warranty claims related to this issue.

This article is written about a recall for bikes in the US market. If you are located in a different geographic region and you own a 2024 or 2025 Daytona 660, you may want to check whether there's a similar recall in your market, as all these bikes were made on the same assembly line for the world.

Testing resulted in Triumph being able to accurately reproduce this problem consistently, but technicians also found that increasing the amount of oil in the engine completely solved the problem.

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Therefore, under the terms of the recall service, authorized Triumph technicians will increase the amount of oil in affected Daytona 660s, as well as replace the existing dipstick with a newly redesigned one that has the correct oil amount clearly marked on it.

Triumph plans to notify its American dealer network on September 14, 2025, and send out letters to registered owners of affected bikes on September 17, 2025. Owners may contact Triumph customer service at 1-678-854-2010 regarding recall campaign number SRAN 640. Additionally, owners may contact the NHTSA Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-888-275-9171) or go to www.nhtsa.gov.