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Help Help required please FZR250

Discussion in 'Yamaha 250cc In-Line 4's' started by Tigger996, Jun 25, 2018.

  1. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    Have a set of CBR1000 stick coils at work if you want them
     
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  2. GreyImport

    GreyImport Administrator Staff Member The Big Cheese Contributing Member

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    Are they suitable for the FZR ? .... I want to put COPs on the drag bike anyway
     
  3. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    I bought them to suit the ZXR, spec for its coils are 23-35 (maybe 2.3 to 3.5? Not a good scan of the manual) ohms on the primary side and 12-18 kilo ohms secondary... 3LN1 supplement says 2.3-3.22 ohms primary and 12-18 kilo ohms secondary... but its all in Japanese so I could be looking at the entirely wrong thing :)
     
  4. GreyImport

    GreyImport Administrator Staff Member The Big Cheese Contributing Member

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  5. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    They're all yours

    @Tigger996

    One thing to try which I found useful when riding an FZR with dodgy carbs / fuelling issues... turn the fuel tap off when it is having issues, pin the throttle and hold it until it clears.

    If the issue is excess fuel, turning the tap off and opening the throttle wide will help clear it out and get it running right... until the bowls dry up.

    I made a habit of turning the fuel tap off at red lights, it helped with the bogging, until I could fix the issue (in my case it was needle jet / jet needles)
     
  6. Tigger996

    Tigger996 Active Member Premium Member Contributing Member

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    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    I have been turning the fuel off and allowing enough time to drop the float levels but doesn't appear to help. when it starts with it's problem no amount of throttle will alter the revs, just slow even beat without the tacho moving. Rightmost (no.4?) exhaust cold and plug wet.
     
  7. risky

    risky risky

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    i would suggest new plug leads, caps and plug. are 2 cylinders out?could be then the coil.
     
  8. Tigger996

    Tigger996 Active Member Premium Member Contributing Member

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    Plugs are new, coils, caps and leads on order. Only no. 4 is a problem.
     
  9. TonyZXR

    TonyZXR Active Member Premium Member

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    the issue is when 1 plug goes bad due to fouling etc the electricity effectively shorts straight to ground and because it is a wasted spark system the other plug on the same coil won't fire so it's actually running on 2 cylinders
     
  10. Tigger996

    Tigger996 Active Member Premium Member Contributing Member

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    It is only no 4, 1 2 & 3 get hot.

    when you run a single plug off a twin coil you are told to earth the other lead.
     
  11. Tigger996

    Tigger996 Active Member Premium Member Contributing Member

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    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    The new coils and the plug caps have arrived. Now I have to get my arse in gear and fix it.

    1. Fit my new carb mounting rubbers.
    2. Check carbs for sticky floats
    3. Coils and caps
    4. Fit 13 tooth gearbox sprocket.
    5. I will probably fit a new fuel filter, clean out the tank, make a bigger hole to let air in the tank, and fit a better fuel tap.

    Is it worth cutting a bigger hole in the air filter box?
     
    Last edited: Aug 13, 2018
  12. risky

    risky risky

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  13. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    • Well said! Well said! x 1
  14. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    I took the little screw on plastic right angle shroud off the inlet to my airbox, the bike ran worse with it off.
    I have a modified standard air filter with the element cut out of it and a K&N element fitted in it's place, not sure it that make's any difference as my original filter was still a bit dirty even after i washed it.
     
  15. GreyImport

    GreyImport Administrator Staff Member The Big Cheese Contributing Member

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    Must have a degree in customer relations and not auto electrics :D

    Dear Brian,

    Thank you for your message.

    Unfortunately we do not stock the SD10F, however we do stock the SD05F if they will be of any good to you?

    Kind Regards
    Jonathan Slaven
    The Customer Success Team - The Green Spark Plug Co.
     
  16. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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  17. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Only thing with paying $52 for 4x spark plug cap's is you can buy a set of good used COP's for not much more.
     
  18. GreyImport

    GreyImport Administrator Staff Member The Big Cheese Contributing Member

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    I was just going to refurb the old caps but I might try Bursons ... if Supercrap has them then they should.

    Ill be putting COPs on the drag bike
     
  19. GreyImport

    GreyImport Administrator Staff Member The Big Cheese Contributing Member

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    Bursons ... direct from NGK Melbourne ... $6 each plus $14 freight for 8


    IMGP1698 (Medium).jpeg
     
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  20. Tigger996

    Tigger996 Active Member Premium Member Contributing Member

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    Thats the ones I had to get from France. The TD850 coils were obtainable here in the UK. It runs but I have only tried it with the airbox off.
     

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