1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Pinned Coil On Plug conversions - COP

Discussion in 'Tech Tips' started by Linkin, Aug 24, 2017.

Thread Status:
Not open for further replies.
  1. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,313
    Likes Received:
    2,367
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    1.5mm cross section wire should be more than enough, iirc the highest Amp's my COP's have pulled is 7A
    1.5mm should be capable of 18A consistantly with a peak of 24A
     
    • Like Like x 1
  2. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    4,264
    Likes Received:
    2,839
    Trophy Points:
    923
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    The primary resistance on my FZR400 coils is 1.8 to 2.2 (service manual), so 0.9 to 1.1 needed for COP's not many in that range.
     
    • Like Like x 1
  3. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,313
    Likes Received:
    2,367
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    You can use COP'S with a higher primary resistance, up to 3 Ohm's (wired in series) or a touch more,
    They will draw less current through your TCI and it'll last longer too
     
  4. Frankster

    Frankster See the World before you leave it Staff Member Premium Member Ride and Events Crew

    Messages:
    2,883
    Likes Received:
    1,489
    Trophy Points:
    823
    Joined:
    Nov 19, 2013
    Gender:
    Male
    Location:
    Melbourne
    My Bike:
    Spada, VT250F & ZX2R
    I made a note in my cheat sheets that the Denso 129700-5350 COPs are meant to be 1.1 Ohms. They're from a Kawasaki ER6.

    https://tinyurl.com/yymfv6gd
     
  5. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    4,264
    Likes Received:
    2,839
    Trophy Points:
    923
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    Last edited: Oct 25, 2020
  6. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,313
    Likes Received:
    2,367
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    Spec's i found for them were 1.1 Ohm's to 1.5 Ohm's on the first page here.
    You won't notice any difference in spark if they are 1.5 Ohm primary each
     
  7. Klapparbaver

    Klapparbaver Member Premium Member

    Messages:
    6
    Likes Received:
    3
    Trophy Points:
    13
    Joined:
    Oct 2, 2020
    Gender:
    Male
    Location:
    Australia
    My Bike:
    1998 ZR250 Balius / 2000 ZX9R
    20201029_163505_HDR.jpg 20201029_144952.jpg zx9r coils work beautifully :) Made a little sub harness with connectors from jaydee and spliced the 2 positives together to use a 3 pin connector for the sub harness to the original harness. Starts up so much easier and runs very nicely. View attachment 47414 View attachment 47415
     
    • Nice Work Nice Work x 4
    • Winner Winner x 1
  8. Klapparbaver

    Klapparbaver Member Premium Member

    Messages:
    6
    Likes Received:
    3
    Trophy Points:
    13
    Joined:
    Oct 2, 2020
    Gender:
    Male
    Location:
    Australia
    My Bike:
    1998 ZR250 Balius / 2000 ZX9R
    Update on the new setup. Tacho gets a bit funky around 7 to 8000 rpm. Jumps around a bit if holding steady at those revs.
    Makes more power because my clutch is now slipping :)
     
  9. kz1000a

    kz1000a Active Member

    Messages:
    34
    Likes Received:
    12
    Trophy Points:
    78
    Joined:
    Dec 13, 2018
    Gender:
    Male
    Location:
    Melbourne
    My Bike:
    '89 ZXR250A '77 Z1000
    Finally got my ZX14 COP’s and subloom delivered. Also got the “proposed” connector and pigtail leads delivered.
    Time to assemble!
    But wait!
    There’s more!
    Can anyone confirm if the wiring in the pic will work?
    Yellow boxed contents are from the donor bike.
    Red boxed contents is my proposed connection to ZXR original primary leads.

    5533B9C0-352C-41C7-A024-45BF6D903506.jpeg
     
  10. jmw76

    jmw76 Well-Known Member Premium Member

    Messages:
    592
    Likes Received:
    276
    Trophy Points:
    348
    Joined:
    Mar 12, 2017
    Gender:
    Male
    Location:
    Melbourne, Australia
    My Bike:
    Honda cbr250rr mc22 road + 1 track, Honda RC 162 tribute bike, Honda Spada Vt250, Honda CBR900RR
    You need to check the primary resistance of the original coils on the ZXR250. If these are 3 ohms or so then probably best to connect COP 1 & 4 in series and 2 & 3 in series then wire each assembly to the standard loom, rather than a parralel connection as you have suggested. A number of other members have made this conversion and I am sure they will comment.

    Peter.
     
    • Like Like x 1
  11. kz1000a

    kz1000a Active Member

    Messages:
    34
    Likes Received:
    12
    Trophy Points:
    78
    Joined:
    Dec 13, 2018
    Gender:
    Male
    Location:
    Melbourne
    My Bike:
    '89 ZXR250A '77 Z1000
    Cheers jmw76

    Just back probed the primary’s between red wire and any other dashed wire.
    Measured 1.4 ohm.
    Should be approx. double that, according to OEM spec.
    Think that I got bad info from WWW

    N.B. Seen much good info on 2fifty site, reguards series configurations between 1&4, 2&3 but was trying to avoid chopping up subloom.

    Believe that this is the desired configuration.


    F167800D-1284-47B2-B121-145BDD2EE41B.png
     
  12. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    2,403
    Likes Received:
    1,039
    Trophy Points:
    818
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    If you want to try and avoid chopping up the loom, figure out how to remove the pins from the plugs themselves, or you may be able to get just the crimp pins for the plugs if any need to be re-pinned shorter - redoing the pins at either end is feasible, avoids cutting & soldering & taping
     
    • Like Like x 1
    • Agree Agree x 1
  13. kz1000a

    kz1000a Active Member

    Messages:
    34
    Likes Received:
    12
    Trophy Points:
    78
    Joined:
    Dec 13, 2018
    Gender:
    Male
    Location:
    Melbourne
    My Bike:
    '89 ZXR250A '77 Z1000
    Yep, will give this a try.
     
    • Like Like x 1
  14. kz1000a

    kz1000a Active Member

    Messages:
    34
    Likes Received:
    12
    Trophy Points:
    78
    Joined:
    Dec 13, 2018
    Gender:
    Male
    Location:
    Melbourne
    My Bike:
    '89 ZXR250A '77 Z1000
    OK, I know this will end in tears if I force it, so does anyone know how to remove the yellow locking wedge?

    F07B1D17-20E6-4180-AA42-09C99562F5A4.png 96DFC3E1-D908-4ACA-85EA-A6425B32C925.jpeg
     
  15. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    2,403
    Likes Received:
    1,039
    Trophy Points:
    818
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    Very likely a jewellers screwdriver in from the back - you'll be looking for a locking tab that lifts up when the yellow piece is inserted

    From the diagram it doesn't look like there's a locking tab on the top, BUT that depends if it's 100% accurate
     
    • Like Like x 1
  16. Jethalter

    Jethalter Well-Known Member

    Messages:
    408
    Likes Received:
    185
    Trophy Points:
    248
    Joined:
    Jan 9, 2019
    Location:
    Australia
    My Bike:
    1990 Suzuki Across + 1971 CB500F + 1975 CB400F - 1978 CB550 + 1985 GT550 + 1982 ct110 mini chopper + 1988 Yamaha FZR400 + 2009 Fischer MRX650 + 2009 Hyosung GV650
    129700-3881

    i just got a pair of these, resistance test primary 1.0 ohm, not 2.5-3.1 Ohm primary as listed.
     
  17. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    2,403
    Likes Received:
    1,039
    Trophy Points:
    818
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    For which bike?

    Here's some details which specs them out at 0.8-1.2
    https://forums.pelicanparts.com/7096463-post5.html

    So from that if you wire them in series, you should have a working resistance of about 2 OHM which is likely acceptable an close to your OEM coil resistance, but I see you got two, not four, so if they're going onto a twin that resistance may be too low and will overload the transistors
     
  18. Jethalter

    Jethalter Well-Known Member

    Messages:
    408
    Likes Received:
    185
    Trophy Points:
    248
    Joined:
    Jan 9, 2019
    Location:
    Australia
    My Bike:
    1990 Suzuki Across + 1971 CB500F + 1975 CB400F - 1978 CB550 + 1985 GT550 + 1982 ct110 mini chopper + 1988 Yamaha FZR400 + 2009 Fischer MRX650 + 2009 Hyosung GV650
    yeah but dont list them as 2.5-3.1 primary when they aint that. list the specs of the actual coil.
     
  19. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    9,499
    Likes Received:
    5,631
    Trophy Points:
    1,168
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Grumpy Old Bastard
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Suzuki GSX250 *Triumph Bonneville 750 T140V *Triumph Daytona 675
    what ? you expect every detail posted on this forum to be 100% accurate?

    who the fuk are you anyway?

    go do your own bloody research!
     
    • Like Like x 1
  20. Jethalter

    Jethalter Well-Known Member

    Messages:
    408
    Likes Received:
    185
    Trophy Points:
    248
    Joined:
    Jan 9, 2019
    Location:
    Australia
    My Bike:
    1990 Suzuki Across + 1971 CB500F + 1975 CB400F - 1978 CB550 + 1985 GT550 + 1982 ct110 mini chopper + 1988 Yamaha FZR400 + 2009 Fischer MRX650 + 2009 Hyosung GV650
    I was just saying what the primary resistance was and that the original post on those coils was incorrect.

    But aye you wanna be like that. Go **** yourself.
     
    • Funny Funny x 2
    • Like Like x 1
    • Nice Work Nice Work x 1
Thread Status:
Not open for further replies.

Share This Page