NHTSA Office of Defects Investigation
Preliminary Evaluation PE03-038: UNINTENDED REAR WHEEL LOCKUP
- Closed
NHTSA's Office of Defects Investigation opened Preliminary Evaluation PE03-038 on August 11, 2003 and closed it on November 6, 2003. NHTSA's investigations file lists the Yamaha Road Star and Road Star Warrior for it and links recalls 03V-309 and 06V-397 to it.
Updated daily from NHTSA's investigations file
Key facts
- NHTSA number
- PE03-038 (also written PE03038)
- Investigation type
- Preliminary Evaluation The first stage of most defect investigations: NHTSA's Office of Defects Investigation gathers basic information about a possible safety defect, including from the manufacturer.
- Status
- Closed November 6, 2003
- Opened
- Closed
- Vehicle or equipment manufacturer
- Yamaha Motor Corporation, USA
- Component
- Power Train — Manual Transmission
- Recalls linked by NHTSA
- Vehicles and equipment
- Yamaha Road Star and Road Star Warrior
NHTSA's summary
As NHTSA's Office of Defects Investigation wrote it for Preliminary Evaluation PE03-038.
SUMMARY: ON AUGUST 22, 2003 YAMAHA NOTIFIED THE AGENCY THAT IT WAS RECALLING CERTAIN MODEL YEAR2001 XV1600 ?ROAD STAR? MODEL MOTORCYCLES TO ADDRESS TRANSMISSION FAILURE IN THOSE VEHICLES.ACCORDING TO THE COMPANY, THE TRANSMISSION WOULD FAIL DUE TO EXCESSIVE BUSHING WEAR ON THE 4TH PINION GEAR.BASED ON ITS ANALYSIS OF FAILED TRANSMISSIONS FROM THE FIELD, THE COMPANY FOUND ?UNEVEN CONTACT BETWEEN THE ENGAGEMENT DOGS ON THE 2ND/3RD PINION GEAR.WHEN IN 4TH GEAR, THESE UNEVEN SURFACES CAUSED UNEVEN BUSHING WEAR IN THE 4TH GEAR BUSHING.THIS WEAR WOULD EVENTUALLY CAUSE THE 4TH GEAR RETAINING CIRCLIP TO FAIL, LEADING TO TRANSMISSION FAILURE.?THIS COULD RESULT IN BOTH TRANSMISSION AND REAR WHEEL LOCKUP AND YAMAHA CONCLUDED A SAFETY RECALL SHOULD BE CONDUCTED TO ADDRESS THE PROBLEM.YAMAHA IS LIMITING THE RECALL?S SCOPE TO THOSE MOTORCYCLES BUILT BETWEEN NOVEMBER 30, 2000 AND JANUARY 24, 2001 BASED UPON THE FOLLOWING:1. YAMAHA U.S. REPORTED FIELD FAILURES (INVOLVING BIKES BUILT IN DECEMBER, 2000) TO YAMAHA JAPAN.2.
YAMAHA JAPAN INVESTIGATED AND VALIDATED THE CAUSE DESCRIBED ABOVE.3.
YAMAHA JAPAN IDENTIFIED THE PROBLEM WAS RELATED TO THE ENGAGEMENT DOG ON THE 2ND/3RD PINION GEAR.4. YAMAHA JAPAN RECORDS INDICATED THAT THE JIG USED TO PRODUCE THE 2ND/3RD PINION GEAR WAS RE-CALIBRATED ON JANUARY 13, 2001.5.
PARTS PRODUCED BEFORE NOVEMBER 30,2000 AND AFTER JANUARY 13, 2001 WERE SAMPLED AND FOUND TO BE WITHIN SPECIFICATION (THE RECALL WAS EXTENDED BEYOND JANUARY 13 BUILD AS A PRECAUTION).
WITH YAMAHA?S RECALL, WE ARE CLOSING THIS INVESTIGATION BUT WILL CONTINUE TO MONITOR THE FIELD PERFORMANCE OF ALL ROAD STAR MODEL MOTORCYCLES TO ASSESS THE PERFORMANCE OF THOSE BIKES NOT COVERED BY THE RECALL.SHOULD THE FACTS WARRANT ADDITIONAL INVESTIGATION, WE WILL PROCEED ACCORDINGLY.
Vehicles and equipment listed for this investigation
NHTSA's investigations file lists these vehicles and equipment for Preliminary Evaluation PE03-038. A listed model year means only that an investigation names it; it says nothing about any particular vehicle. Model years with a try.vin recall page link to that page's NHTSA investigations section.
What an NHTSA investigation is
NHTSA's Office of Defects Investigation (ODI) looks into possible safety defects in vehicles and equipment, often after owner complaints. An investigation usually starts as a Preliminary Evaluation, or as a Recall Query when it concerns whether an existing recall covers the right vehicles or fixes the problem, and ODI can upgrade it to a more detailed Engineering Analysis. A Defect Petition asks NHTSA to open an investigation, and Audit and Equipment Queries are administrative investigations into whether companies complied with federal vehicle safety requirements, such as reporting, recall and certification rules.
An open investigation is not a finding that a safety defect exists, and NHTSA can close one without a recall.
To see whether a specific vehicle has an open recall, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Sources
NHTSA's investigation record for PE03-038
Investigation details come from NHTSA's investigations file, which try.vin imports once a day. The investigation types are described from the U.S. Department of Transportation Inspector General's May 2023 report on NHTSA's Office of Defects Investigation, NHTSA's petition rules (49 CFR Parts 552 and 557) and NHTSA's Office of Defects Investigation procedures. How try.vin reads NHTSA investigations.