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

Help Help required please FZR250

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

  1. TonyZXR

    TonyZXR Active Member Premium Member

    Messages:
    154
    Likes Received:
    57
    Trophy Points:
    53
    Joined:
    Apr 17, 2018
    Gender:
    Male
    Location:
    New South Wales
    My Bike:
    GPX250, ZXR250A, ZXR250C
    is the battery being charged when the engine is running ?
     
  2. Tigger996

    Tigger996 Member Premium Member Contributing Member

    Messages:
    71
    Likes Received:
    43
    Trophy Points:
    28
    Joined:
    Sep 24, 2017
    Gender:
    Male
    Location:
    Totton, UK
    My Bike:
    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    Don't know. The problems listed above do get progressively worse during a weekends sprinting.
     
  3. my67xr

    my67xr Senior Member Staff Member Premium Member Contributing Member

    Messages:
    2,703
    Likes Received:
    1,616
    Trophy Points:
    798
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide
    My Bike:
    Yamaha's, FZR250 3LN3 1990, XT250TS 57R 1986, IT200L 43G 1984
    So with the voltage around 12v it should have a minimum of 12.6v after sitting for an hour. Idling it should be putting out about 13.8v, then at 4000rpm + it should be around 14.4v
     
    • Like Like x 1
  4. Tigger996

    Tigger996 Member Premium Member Contributing Member

    Messages:
    71
    Likes Received:
    43
    Trophy Points:
    28
    Joined:
    Sep 24, 2017
    Gender:
    Male
    Location:
    Totton, UK
    My Bike:
    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    I will check it as soon as the temp in my bike shed drops to a sensible level. We are in a heat wave in the UK and a flat roofed shed acts as an oven.
     
  5. Tigger996

    Tigger996 Member Premium Member Contributing Member

    Messages:
    71
    Likes Received:
    43
    Trophy Points:
    28
    Joined:
    Sep 24, 2017
    Gender:
    Male
    Location:
    Totton, UK
    My Bike:
    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    Voltage remains constant at about 12.7V with or without the engine running. Do they suffer with regulator/rectifier problems (hopefully yes as it is cheap to replace).
     
  6. TonyZXR

    TonyZXR Active Member Premium Member

    Messages:
    154
    Likes Received:
    57
    Trophy Points:
    53
    Joined:
    Apr 17, 2018
    Gender:
    Male
    Location:
    New South Wales
    My Bike:
    GPX250, ZXR250A, ZXR250C
    I would first start by checking all the plugs between the stator and regulator for melting and corrosion, then check the stator is good before buying a new regulator
     
  7. my67xr

    my67xr Senior Member Staff Member Premium Member Contributing Member

    Messages:
    2,703
    Likes Received:
    1,616
    Trophy Points:
    798
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide
    My Bike:
    Yamaha's, FZR250 3LN3 1990, XT250TS 57R 1986, IT200L 43G 1984
    Yeah any older bike can have problem's with the regulator/rectifier.
    If your reading's off the stator are good, and no problem's between the plug/socket's near the fuel pump and regulator maybe check the diode's in your reg/rect
    You can either put a new reg/rect in or find a good low km's reg/rect off another bike and modify you wiring to suit, i used an R6 rec/rect on mine.
     
  8. Tigger996

    Tigger996 Member Premium Member Contributing Member

    Messages:
    71
    Likes Received:
    43
    Trophy Points:
    28
    Joined:
    Sep 24, 2017
    Gender:
    Male
    Location:
    Totton, UK
    My Bike:
    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    I will check. Reg/Rec only about £12 (21.26 AUD)
     
  9. my67xr

    my67xr Senior Member Staff Member Premium Member Contributing Member

    Messages:
    2,703
    Likes Received:
    1,616
    Trophy Points:
    798
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide
    My Bike:
    Yamaha's, FZR250 3LN3 1990, XT250TS 57R 1986, IT200L 43G 1984
    For a cheap china one maybe, the genuine Shindengen SH578A reg/rect would be around $150 AU
     
  10. Tigger996

    Tigger996 Member Premium Member Contributing Member

    Messages:
    71
    Likes Received:
    43
    Trophy Points:
    28
    Joined:
    Sep 24, 2017
    Gender:
    Male
    Location:
    Totton, UK
    My Bike:
    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    Battery charging is OK, the reason that it seemed faulty was that the regulator earth was on a panel bolt and I removed the panel to get at the regulator and didn't notice that I was testing without an earth ... D'oh. I will now move on to the coils
     
    • Like Like x 2
  11. Tigger996

    Tigger996 Member Premium Member Contributing Member

    Messages:
    71
    Likes Received:
    43
    Trophy Points:
    28
    Joined:
    Sep 24, 2017
    Gender:
    Male
    Location:
    Totton, UK
    My Bike:
    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    Bike still has the problem 50% of the time. When it is being a pain the rightmost exhaust is cold so I will test the coil and the float chamber.

    Many people have suggested "**** in the carb" the problem is that you have to have a good sense of balance and you cannot trust the sidestand, so at my advanced age I am not going to try it.
     
  12. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

    Messages:
    3,323
    Likes Received:
    1,963
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    ZXR250C
    If there's still problems since the shop rebuilt it, I'd be going back and getting them to investigate.

    Before doing that I would suggest checking the slide needles for wear
     
  13. Tigger996

    Tigger996 Member Premium Member Contributing Member

    Messages:
    71
    Likes Received:
    43
    Trophy Points:
    28
    Joined:
    Sep 24, 2017
    Gender:
    Male
    Location:
    Totton, UK
    My Bike:
    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    I think the problem is a heat (coils?) or a intermittent blockage. Most likely the coil/lead/cap as the plug was wet when I checked it. Would any make of dual coil work as I can get new ones rather than an old genuine one?
     
  14. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

    Messages:
    3,323
    Likes Received:
    1,963
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    ZXR250C
    You need to match the coil resistance against the spec in the manual.
     
  15. Tigger996

    Tigger996 Member Premium Member Contributing Member

    Messages:
    71
    Likes Received:
    43
    Trophy Points:
    28
    Joined:
    Sep 24, 2017
    Gender:
    Male
    Location:
    Totton, UK
    My Bike:
    Yamaha-Fzr250-3LN-EXUP 1989. Ducati 998S & 996 & 900SS & ST4. Triton. Suzuki T500 road & T500 race. RS125 with Rotax 257 engine.
    Chasing parts numbers
    Coil is the same part as fitted to Yamaha TD850
    Plug caps same as Yamaha Thundercat
     
  16. my67xr

    my67xr Senior Member Staff Member Premium Member Contributing Member

    Messages:
    2,703
    Likes Received:
    1,616
    Trophy Points:
    798
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide
    My Bike:
    Yamaha's, FZR250 3LN3 1990, XT250TS 57R 1986, IT200L 43G 1984
    Last edited: Aug 7, 2018
  17. GreyImport

    GreyImport Administrator Staff Member The Big Cheese Contributing Member

    Messages:
    7,524
    Likes Received:
    4,483
    Trophy Points:
    943
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Troublemaker
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Suzuki GSX250 *Triumph Bonneville 750 T140V
  18. my67xr

    my67xr Senior Member Staff Member Premium Member Contributing Member

    Messages:
    2,703
    Likes Received:
    1,616
    Trophy Points:
    798
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide
    My Bike:
    Yamaha's, FZR250 3LN3 1990, XT250TS 57R 1986, IT200L 43G 1984
    ^ Those cap's are only 5K Ohm, standard FZR cap's are 10K Ohm so it would be pulling a lot more amp's through the coil's
     
  19. GreyImport

    GreyImport Administrator Staff Member The Big Cheese Contributing Member

    Messages:
    7,524
    Likes Received:
    4,483
    Trophy Points:
    943
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Troublemaker
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Suzuki GSX250 *Triumph Bonneville 750 T140V
    Ive had them on there for years ... Im sure I researched that before replacing them ... where did u get your info from?
     
  20. GreyImport

    GreyImport Administrator Staff Member The Big Cheese Contributing Member

    Messages:
    7,524
    Likes Received:
    4,483
    Trophy Points:
    943
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Troublemaker
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Suzuki GSX250 *Triumph Bonneville 750 T140V
    So I dug into the archives to find this on a very old post (couldnt find it actually on any spec sheets)

    FZR 250 specs
    Coil primary 2.8ohm +/- 15%
    Secondary 15Kohm +/- 20%
    Spark plug resistor 10Kohm
    Pickup coil 230ohm +/- 20%


    But 99% of the caps available are 5k ... why is that ?

    https://2fiftycc.com/index.php?resources/ngk-spark-plug-covers.235/

    And what will it do having the different caps on there? ... damage the coils over time ... ?
     
    • Agree Agree x 1

Share This Page