Recall 18V730 affects 1,902 2015-2018 Yamaha SR400 motorcycles because engine oil can leak onto the rear tire. Repair is free at any franchised Yamaha dealer.
Yamaha is recalling 1,902 2015-2018 SR400 motorcycles because an insufficiently tightened engine oil line flare nut can let oil leak onto the rear tire. Oil on the rear tire can cause loss of control and increase crash risk, and the Yamaha dealer repair will be free once available.
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What's wrong?
On the 2015-2018 Yamaha SR400, oil line #2 is part of the engine oil system. It carries engine oil under pressure so the engine stays lubricated while the motorcycle is running. A flare nut secures that line at its fitting, keeping oil inside the line instead of letting it seep out around the connection.
On affected SR400 motorcycles, that flare nut was tightened to 35Nm, which Yamaha later found was not enough. The updated specification is 50Nm. When the nut is not tight enough, engine vibration and normal heat cycles can let oil escape from the fitting. The part itself did not change; the problem is the tightening torque used on the oil line connection.
Owners can notice oil leaking from oil line #2. If it is left unchecked, that oil can drip onto the engine, side case, the rider's foot, and the rear tire.
Who's affected?
Spans the 2015, 2016, 2017, and 2018 SR400 model years, all tied to the same engine component.
| 2015 Yamaha SR400 | Engine |
|---|---|
| 2016 Yamaha SR400 | Engine |
| 2017 Yamaha SR400 | Engine |
| 2018 Yamaha SR400 | Engine |
| Units affected | 1,902 |
| Field incidents | NHTSA has logged no field incidents to date. |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific motorcycle is included.
What's the safety risk?
Oil leaking onto the rear tire can cause loss of control and increase the risk of a crash. Oil on oil line #2, the engine side case, or the rider's foot is a warning sign; if you see it, park the motorcycle and call a Yamaha dealer before riding again. Repair will be free at any franchised Yamaha dealer once available.
What should I do?
- Check your VIN to confirm your 2015-2018 Yamaha SR400 is included in this recall.
- Call Yamaha customer service at 1-800-962-7926 to confirm the current repair timing before riding to a dealer.
- Contact a franchised Yamaha dealer once Yamaha confirms the repair is open.
- Schedule the free engine-oil-line inspection that checks the loose flare nut and oil leak path to the rear tire.
- Bring the recall notice if Yamaha sent one. If not, reference recall number 18V730 when you call.
- Avoid riding until the dealer inspects the engine oil line. Oil on the rear tire can lead to loss of control.
What happens at the repair
Yamaha has described the dealer repair, and the final dealer repair will be free once available. At the dealer, a Yamaha technician inspects the engine oil line flare nut connection. If oil is not leaking, the technician tightens the nut. If oil is leaking, the technician replaces the engine oil line and tightens the flare nut. Parts and labor are covered under the recall. Yamaha has a general reimbursement plan on file for eligible out of pocket repairs paid before the recall notice. Bring prior repair paperwork to the service desk or contact Yamaha customer service.
| Reimbursement | Reimbursement available |
|---|
Timeline
| October 16, 2018 | NHTSA published the recall |
|---|---|
| October 29, 2018 | Dealer notification began |
| October 29, 2018 | Interim owner notification (was planned for this date) |
| October 31, 2018 | Owner notification mailed |
| October 31, 2018 | Dealer notification ended |
Frequently asked questions
What is recall 18V730?
Recall 18V730 covers 1,902 2015-2018 Yamaha SR400 motorcycles with an engine oil line flare nut that was not tightened enough. Oil can leak onto the rear tire, which can cause loss of control and increase crash risk. Yamaha dealers inspect and repair the connection for free.
What should I do if my 2015-2018 Yamaha SR400 is on this recall?
Check your VIN to confirm your specific motorcycle is included in recall 18V730. If it is, contact a franchised Yamaha dealer for the engine oil line inspection. Reference recall number 18V730 when you call. Yamaha customer service is at 1-800-962-7926.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Yamaha dealers inspect the flare nut connection for free, then tighten the nut or replace the engine oil line and tighten the flare nut if oil is leaking.
What is the safety risk on this Yamaha SR400 recall?
The safety risk is oil reaching the rear tire. If the engine oil line leaks onto that tire, the motorcycle can lose traction and control, increasing crash risk. Confirm your VIN, then use a franchised Yamaha dealer for the free recall inspection and repair.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/18V730000 |
|---|---|
| Yamaha customer service | 1-800-962-7926 |
| NHTSA recall # | 18V730 |
| NHTSA recall # (full) | 18V730000 |
Source documents
-
Download Misc. Document (PDF) - Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 25, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →