Page 1 of 2 12 LastLast
Results 1 to 10 of 19

Thread: Time to change plugs

  1. #1
    Site Supporter Kevin_56's Avatar
    Bike
    03 ST 1300
    Join Date
    Sep 2006
    Location
    Montfort, Wisconsin
    Age
    61
    Posts
    2,985
    Tip Overs
    1
    2017 Miles
    008083

    My SPOT
    My Gallery

    Time to change plugs

    It has been 102,000 miles since my last plug change. I put Iridium plug in back in 2010. I am now changing them at 102+ K.

    This is the first time I have removed them since installing them. Yes they are showing signs of use, but no where near as I expected.

    Click image for larger version. 

Name:	IMG_1466.JPG 
Views:	73 
Size:	134.3 KB 
ID:	188298Click image for larger version. 

Name:	IMG_1469.jpg 
Views:	64 
Size:	128.6 KB 
ID:	188299Click image for larger version. 

Name:	IMG_1471.jpg 
Views:	66 
Size:	167.3 KB 
ID:	188300

    Now for another 100K
    Kevin Elliott

    2003 ST1300
    STOC # 6495
    IBA # 39340

  2. The Following 2 Users Like This Post:


  3. #2
    SMSW's Avatar
    Bike
    2010 ST1300
    Join Date
    Sep 2013
    Location
    cleveland
    Posts
    2,661
    My Gallery

    Re: Time to change plugs

    In your first pic, the used plug shows little beads on the ground electrode. I thought the optimal look was a light brown color. You might go online to a chart of how to read spark plugs to see what this means.

  4. #3
    Bush's Avatar
    Bike
    1996 ST1100
    Join Date
    Jun 2006
    Location
    British Columbia
    Age
    68
    Posts
    1,928
    My Gallery

    Re: Time to change plugs

    That plug looks quite normal to me, considering over 100,000 miles of use.

  5. #4
    Site Supporter
    (Threadstarter)
    Kevin_56's Avatar
    Bike
    03 ST 1300
    Join Date
    Sep 2006
    Location
    Montfort, Wisconsin
    Age
    61
    Posts
    2,985
    Tip Overs
    1
    2017 Miles
    008083

    My SPOT
    My Gallery

    Re: Time to change plugs

    Quote Originally Posted by Bush View Post
    That plug looks quite normal to me, considering over 100,000 miles of use.
    That is what I read. White with a nice roasted marshmallow brown on all 4.

  6. The Following User Likes This Post:


  7. #5
    Upt' North's Avatar
    Bike
    ST1100W
    Join Date
    Feb 2016
    Location
    Northumberland UK
    Posts
    870
    2017 Miles
    003100

    My Gallery

    Re: Time to change plugs

    If that Plug has done 100k, change nothing, it's good to go.
    Enjoy your next 100.
    That ain't half a lot of miles.
    Upt'North.

  8. #6
    Natural Rider Enhancement Blrfl's Avatar
    Bike
    Fast Blue One
    Join Date
    Aug 2005
    Location
    Northern Virginia
    Age
    49
    Posts
    10,371
    Tip Overs
    1
    My Gallery

    Re: Time to change plugs

    If you still have the old ones, how does the internal resistor measure out?

    --Mark
    Wizzzzzzzzzzzz What's a Blrfl? ... Shameless plugs: STWiki

  9. #7
    Site Supporter
    (Threadstarter)
    Kevin_56's Avatar
    Bike
    03 ST 1300
    Join Date
    Sep 2006
    Location
    Montfort, Wisconsin
    Age
    61
    Posts
    2,985
    Tip Overs
    1
    2017 Miles
    008083

    My SPOT
    My Gallery

    Re: Time to change plugs

    Quote Originally Posted by Blrfl View Post
    If you still have the old ones, how does the internal resistor measure out?

    --Mark
    1 - 4.2
    2 - 4.1
    3 - 4.6
    4 - 4.1

    Measured with a Fluke 23 DMM.

  10. #8
    Natural Rider Enhancement Blrfl's Avatar
    Bike
    Fast Blue One
    Join Date
    Aug 2005
    Location
    Northern Virginia
    Age
    49
    Posts
    10,371
    Tip Overs
    1
    My Gallery

    Re: Time to change plugs

    Quote Originally Posted by Kevin_56 View Post
    1 - 4.2
    2 - 4.1
    3 - 4.6
    4 - 4.1
    I take it that's K ohms and not ohms. That puts your plugs at about 15% off a nominal 5K over 100,000 miles. That seems decent.

    (There was a thread some time ago where I discussed resistor deterioration as a reason to change the plugs even if the business end still looked nice. This is one data point.)

    --Mark

  11. #9
    Site Supporter
    (Threadstarter)
    Kevin_56's Avatar
    Bike
    03 ST 1300
    Join Date
    Sep 2006
    Location
    Montfort, Wisconsin
    Age
    61
    Posts
    2,985
    Tip Overs
    1
    2017 Miles
    008083

    My SPOT
    My Gallery

    Re: Time to change plugs

    Quote Originally Posted by Blrfl View Post
    I take it that's K ohms and not ohms. That puts your plugs at about 15% off a nominal 5K over 100,000 miles. That seems decent.

    (There was a thread some time ago where I discussed resistor deterioration as a reason to change the plugs even if the business end still looked nice. This is one data point.)

    --Mark
    My unit auto ranges, so I am not sure of the reading. I brought one of the plugs to a friends for show and tell. Checked on his meter and it is k ohms.

  12. #10
    st1300r's Avatar
    Bike
    st1300 '04
    Join Date
    Apr 2007
    Location
    New Jersey
    Age
    56
    Posts
    8,049
    Tip Overs
    2
    My Gallery

    Re: Time to change plugs

    iirc one of the manufacturers claim 20db down emi suppression with a new set of their resistor plugs.

    ancient history, but I remember auto ranging helping to get the wrong reel of chip resistors loaded on a pickandplace machine, which was perfectly happy picking and placing at amazing rates of speed
    Last edited by st1300r; 12-02-2017 at 09:41 AM.
    Carl, SToc#7163, ST1300 '04

+ New Posts
Page 1 of 2 12 LastLast

Posting Permissions

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