/ Register

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

Help FZR250 Ignitech conversion

Discussion in 'Yamaha 250cc In-Line 4's' started by GreenRussian, Nov 12, 2020.

  1. GreenRussian

    GreenRussian Member

    Messages:
    1
    Likes Received:
    0
    Trophy Points:
    5
    Joined:
    Nov 7, 2020
    Location:
    Australia
    My Bike:
    Fzr250
    Hi Everyone,

    Has anyone got a base map for a PCIV4? I am having some trouble setting up a base to get the engine running.
     
    GreenRussian, Nov 12, 2020
    #1
  2. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    3,233
    Likes Received:
    1,423
    Trophy Points:
    918
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    Hi there,

    No experience with the ignitech, however your question intrigued me as I didn't know for certain the base ignition advance and the max ignition advance

    See screenshots - I've take screen shots from the 3 service manuals & supplements that we have to hand

    Interesting differences between them

    hope this helps

    First 2KR - 10 degrees @ 1600RPM -> 53 degrees @6500RPM

    2KR-igntion.png


    3LN1 - 10 degrees @1600RPM -> 44 degrees @ 16000 RPM

    3LN1-ignition.png



    3LN3 - 15 degrees @ 1600RPM -> 46 degrees @ 6000RPM

    3LN3-ignition.png
     
    ruckusman, Nov 12, 2020
    #2
  3. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    If Ignitech do not have a map, I believe they can make one if you send them a standard TCI.
     
    • Agree Agree x 1
    maelstrom, Nov 12, 2020
    #3
  4. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    3,233
    Likes Received:
    1,423
    Trophy Points:
    918
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    FWIW - I believe they use a signal generator to simulate the VR pickup to stimulate the TCI at various RPM throughout the range.
    Then you'd have an oscilloscope measuring the decreasing spark delay from the TCI as it approaches peak advance

    Chart it on a piece of graph paper or in an excel spreadsheet and voila you have your spark map
     
    ruckusman, Nov 13, 2020
    #4

Share This Page