Since I have not seen this here, I'm re-posting from a post dated 1/6/21 in the fjrforum.com thinking it may be helpful. I hope I'm not breaking any forum rules...
U.S. NHTSA Campaign Number: 20V813000
Manufacturer Yamaha Motor Corporation, USA
Components POWER TRAIN
Potential Number of Units Affected 2,285
Summary
Yamaha Motor Corporation, USA (Yamaha) is recalling certain 2016-2020 Yamaha FJR13A and FJR13AE motorcycles. The second gear of the transmission can crack and break under high speed loads.
Remedy
Yamaha will notify owners, and dealers will inspect and, as necessary, reprogram the Engine Control Unit (ECU) and replace the main axle and drive axle assemblies, free of charge. The recall is expected to begin January 13, 2021. Owners may contact Yamaha customer service at 1-800-962-7926. Yamaha's number for this recall is 990141. Note: Owners are advised not to operate their motorcycle until the repairs have been performed.
Description of Defect :
Description of the Defect : In affected motorcycles, the side of second gear may not be strong enough to
handle high speed loads. As a result, cracks may occur due to constant stress
applied during repeated gear shift operation and, eventually, the gear could
break. If this happens, the transmission and, in turn, the rear wheel, could lock,
increasing the risk of loss of control and a crash
Description of the Safety Risk : The side of second gear may not be strong enough to handle high speed loads.
As a result, cracks may occur due to constant stress applied during repeated
gear shift operation and, eventually, the gear could break. If this happens, the transmission and, in turn, the rear wheel, could lock
Description of the Cause : second pinion gear may not be strong enough to handle high speed loads. As a
result, cracks may occur due to constant stress applied during repeated gear
shift operation
Identification of Any Warning that can Occur :
difficulty shifting, finding neutral and false neutrals may occur prior to gear
breakage
Chronology :
In late November, Yamaha Motor Corporation USA was informed by the manufacturer, Yamaha Motor Co., LTD
that such a condition exists. This was determined pursuant to quality control review, testing and a review of
foreign models that use substantially similar part design
Description of Remedy :
Description of Remedy Program : Affected units must have the main axle and drive axle assemblies replaced
with the stronger parts and the Engine Control Unit (ECU) reprogrammed to prevent excessive rpm leading to second gear damage
How Remedy Component Differs from Recalled Component :
Second pinion gear is now forged and 2nd pinion on the main axel and 1st
and 5th wheel gear on the drive axle have a small identification groove
machined on them to aid identification Part 573 Safety Recall Report 20V-813 Page 3
The information contained in this report was submitted pursuant to 49 CFR §573
Identify How/When Recall Condition was Corrected in Production :
With the start of November 2020 production, the new style forged 2nd
pinion gear on the main transmission axel and 1st and 5th wheel gear on
the drive transmission axel are used for engine/transmission assembly
Recall Schedule :
Description of Recall Schedule : We anticipate commencing dealer/consumer notification shortly after
the owner's notification letter is approved by NHTSA, the affected VIN
range is ascertained, and the Technical Bulletin's service procedures are
confirmed and finalized by Yamaha staff. assuming the Agency can review
and approve the customer notification letter within 5 days of receipt
(perhaps January 8th we will have the letter and technical bulletin
printed. Normal turnaround time is 3 working days for such a printing.
Hence the materials will be ready for mailing approximately January
13th. Final copies of these notification documents will be forwarded to
the Agency as soon as possible.
Planned Dealer Notification Date : JAN 13, 2021 - JAN 15, 2021
Planned Owner Notification Date :
JAN 13, 2021 - JAN 15, 2021
Production Dates : DEC 09, 2015 - FEB 02, 2020
VIN Range 1 : Begin : JYARP29E6GA000002 End : JYARP29EXKA000822
Not sequential
VIN Range 2 : Begin : JYARP29Y3GA000002 End : JYARP29Y8KA000151
Not sequential
VIN Range 3 : Begin : JYARP30E0GA000001 End : JYARP30E7LA001009
Not sequential
VIN Range 4 : Begin : JYARP30Y7GA000006 End : JYARP30Y8LA000221
Not sequential
VIN Range 5 : Begin : JYARP31Y4JA000003 End : JYARP31Y3LA000092
Not sequential
www.nhtsa.gov
