"How reliable is the 2009 Yamaha Yw125?"

"Based on 29 NHTSA complaints, the 2009 Yamaha Yw125 has a median complaint mileage of 1100 miles. The most common issue is Fuel System, Gasoline."

"What are common problems with the 2009 Yamaha Yw125?"

"The most frequently reported component in NHTSA complaints for the 2009 Yamaha Yw125 is Fuel System, Gasoline, accounting for a significant portion of the 29 total complaints filed."

2009 Yamaha Yw125: Reliability Data

Source: NHTSA — 29 complaints

Total Complaints

1,100mi

Median Mileage

Fuel System, Gasoline

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

800 25th Percentile

1,100 Median Mileage

2,200 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Fuel System, Gasoline

Fuel System, Other

Fuel/Propulsion System

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"THIS IS REGARDING A 2009 YAMAHA ZUMA 125 SCOOTER. THERE HAS BEEN A WIDESPREAD ISSUE WITH THE FUEL PUMPS ON THESE BIKES AND MINE FINALLY BROKE DOWN THE OTHER DAY. THE ISSUE IS THAT IF THE OUTSIDE TEMPERATURE IS HOT ENOUGH IT CAUSES THE FUEL PUMP TO COMPLETELY FAIL. LUCKILY MINE STOPPED WORKING WITH ..."

"VEHICLE'S ENGINE STALLS WHILE RIDING, OR AT IDLE, UNDER NORMAL OPERATING CONDITIONS. THIS OCCURS MOST OFTEN WHEN OUTSIDE AIR TEMPERATURE IS ABOVE 85 DEGREES FAHRENHEIT. THE FIRST TIME THE VEHICLE STALLED ( ON OR AROUND 5/15/2010)I WAS STOPPED AT AN INTERSECTION AND WAS ABLE TO RESTART THE VEHICLE IM..."

"SCOOTER WOULD NOT START AFTER 10 MINUTES OF RUNNING. I WOULD TURN THE ENGINE OFF AND COULD NOT RESTART UNTIL ENGINE HAD COOLED. *TR"

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

When Does Each Component Fail?

Median mileage at complaint for top components.

Fuel System, Gasoline 23 complaints

25th: 798 mi Median: 1,125 mi 75th: 2,185 mi

Fuel System, Other 3 complaints

Median: 943 mi

Fuel/Propulsion System 3 complaints

Median: 1,024 mi

Where Are Complaints Coming From?

Top states by complaint count.

FL: 4 GA: 3 MA: 2 MN: 2 MI: 2 NC: 2 AZ: 2 KS: 1 TN: 1 OR: 1

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28