Results 1 to 6 of 6

Thread: What can causes a rectifier damage?

  1. #1
    apriliaforum newb
    Join Date
    Aug 2017
    Location
    Germany
    Posts
    3

    What can causes a rectifier damage?

    Hi There

    I lost my third rectifier in two weeks.

    the problem is, that after a few kilometers,the voltage goes down from ~14V to ~12,5V.

    When the voltage problem first came up, I installed a new battery and a new strator. Without success.
    Then I changed the rectifier. I was able to drive a few kilometers, than it happend again. When I (maybe a coincidence) turned on the grip heating, the tension went down again.


    The second new rectifier has also broken after a few kilometers. (grip heating was not connected) Usually this always happened in the morning.

    I have measured the cables from all rectifier, they are definitely broken.

    There are no optical abnormalities in the wiring, all fuses are OK, everything is running and sounds normal.

    What can causes a rectifier damage?

    Thanks for your help,
    Myrko

  2. #2
    apriliaforum prov-nov MCR's Avatar
    Join Date
    Jul 2009
    Location
    Italy
    Posts
    55
    The main way to burn the regulator is with a big amount of heat deissipation due to an excess of current absorbtion on the output. Of course is necessary the a good battery is ever connected else the regulator fail for load dump. Check the connection between regulator and battery with robust and stable connections.

  3. #3
    apriliaforum newb
    Join Date
    Aug 2017
    Location
    Germany
    Posts
    3
    I read about this heatproblem so i placed the rectifier behind the windschield in the airflow.
    Click image for larger version. 

Name:	IMG_20190514_192903.jpg 
Views:	11 
Size:	85.1 KB 
ID:	380565
    But after two days the next recifierer broke down. This is not a thing of the connection or the heat, there is somthing else.
    I thing i will check the coils and the wirering around, because there are using "a lot of" current.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_20190514_192853.jpg 
Views:	7 
Size:	88.2 KB 
ID:	380566  


  4. #4
    apriliaforum expert nerald's Avatar
    Join Date
    Dec 2007
    Location
    Cumbria
    Posts
    1,106
    What people do not seem to appreciate is the fact a regulator/rectifier needs to be physically bolted to a metal object (possibly using thermal grease to aid heat transfer), this is to help with heat dissipation, simply placing in the airflow is not enough to protect the internal components, most reg/recs fail intermittently initially which leads me to think that internal joints fail due to the repeated hot/cold heat cycles causing metal fatigue. Just my thoughts.
    08 ETV 1000 Caponord
    NC705X DCT - The Blue Toad
    Honda PCX125 - White Lightning.
    CRF250L - LRP.

  5. #5
    apriliaforum Member laszlo__'s Avatar
    Join Date
    Sep 2005
    Location
    Szekesfehervar; HUNGARY
    Posts
    115
    Quote Originally Posted by nerald View Post
    What people do not seem to appreciate is the fact a regulator/rectifier needs to be physically bolted to a metal object (possibly using thermal grease to aid heat transfer), this is to help with heat dissipation, simply placing in the airflow is not enough to protect the internal components, most reg/recs fail intermittently initially which leads me to think that internal joints fail due to the repeated hot/cold heat cycles causing metal fatigue. Just my thoughts.
    In OE condition there is not too much metal contact surface from frame side as well.
    60 V2 ..... best ever.....

    2019- ETV 1000 RR
    2013- 2018 APRILIA ETV1000
    2005: APRILIA RST1000
    2002-2005: BMW F650

  6. #6
    apriliaforum Member laszlo__'s Avatar
    Join Date
    Sep 2005
    Location
    Szekesfehervar; HUNGARY
    Posts
    115
    Quote Originally Posted by kombogol View Post
    I read about this heatproblem so i placed the rectifier behind the windschield in the airflow.
    Click image for larger version. 

Name:	IMG_20190514_192903.jpg 
Views:	11 
Size:	85.1 KB 
ID:	380565
    But after two days the next recifierer broke down. This is not a thing of the connection or the heat, there is somthing else.
    I thing i will check the coils and the wirering around, because there are using "a lot of" current.
    in my opinion, in that internal place it gets hot air from the cooler.
    60 V2 ..... best ever.....

    2019- ETV 1000 RR
    2013- 2018 APRILIA ETV1000
    2005: APRILIA RST1000
    2002-2005: BMW F650

Similar Threads

  1. what can cause the "no start" on dash (searched extensively)
    By gittermoto in forum RSV1000 Mille, Mille R, and Mille SP (1998-2003)
    Replies: 7
    Last Post: 08-07-2018, 01:58 PM
  2. What causes sprag clutch damage?
    By mutte in forum 2006-2011 Aprilia RXV, SXV, MXV 4.5/5.5 V-Twins
    Replies: 1
    Last Post: 10-24-2013, 09:23 PM
  3. what can cause gearbox oil into water???
    By tgracingnz in forum 2006-2011 Aprilia RXV, SXV, MXV 4.5/5.5 V-Twins
    Replies: 2
    Last Post: 12-14-2012, 09:26 PM
  4. What can I do to get more range.
    By THUNDERMILLE in forum RSV1000 Mille, Mille R, and Mille SP (1998-2003)
    Replies: 22
    Last Post: 01-25-2004, 12:36 PM
  5. My fairings, what can I do?
    By miracleRS125 in forum RS125 Euro-archive
    Replies: 7
    Last Post: 07-09-2003, 11:43 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •