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Project Suzuki GF250f

Discussion in 'Your 250cc Projects' started by Callam, May 5, 2020.

  1. Callam

    Callam Member

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    Hi all I've bought a gf250

    GF250.JPG

    the carbs were off the bike when I bought it, some questions.
    Any diagrams for the bike,? Can't find any manuals
    all 4 pilot jets should be the same size? #30 I belive

    DSC_1716.JPG

    The wire from water temp sender is snapped and I don't know which colour it plugs to.
    Any advice on the carbs? One of the pilot jet tubes is damaged, will fixing it with chemical alloy work?
    Thanks, I'm in the uk

    DSC_1708.JPG DSC_1708.JPG DSC_1711.JPG
     
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  2. Murdo

    Murdo The Good Doctor Staff Member Premium Member Ride and Events Crew Contributing Member

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    Help yourself by getting the Litetek seal kits from @maelstrom and becoming a premium member to get access to the manuals. Metal alloy would work to rebuild the broken bit (eg Devcon or similar).
    Sounds like you are going for a full rebuild/paint so good luck with it. Should be a nice bike to ride when done. Make a build thread with lots of progress photos.
     
  3. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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  4. Frankster

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

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  5. Callam

    Callam Member

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    I'm glad somebody else finally agrees they can be fixed, asked several carb specialists and they've deemed the carbs scrap
     
  6. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    I've had a Lectron carby tig welded before, a post for the float pin was broken, my mate said it was a bit hard to do but it worked out fine
     
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  7. Murdo

    Murdo The Good Doctor Staff Member Premium Member Ride and Events Crew Contributing Member

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    Some of the 'specialists' have a narrow view of things that can/cannot be repaired.
    Show a photo of the broken bits so can get better ideas.
     
  8. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    The centre tower on this carby

    [​IMG]
     
  9. Murdo

    Murdo The Good Doctor Staff Member Premium Member Ride and Events Crew Contributing Member

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    That all? Good clean with thinners or acetone, put a plastic hose of the correct diameter into the remaining hole and lay some Devcon or similar over it and mold to shape. Let dry and remove plastic hose and file to finished shape.
     
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  10. Callam

    Callam Member

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    Threads for the jet are gone too but I've. Marked my screwdriver to how deep others sit was going to use the chemical metal and re tap it to fit the jet when it's half set
     
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  11. Callam

    Callam Member

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    Currently waiting some some bits to arrive so investigated the wiring. one of the broken wires is to the fuel tank. I have done a video of me doing the repair and getting the float out on youtube





    Removed top engine cover and it is incredibly good under there, belive now the 16k is genuine

    DSC_3448.JPG
     
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  12. Callam

    Callam Member

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    Got the carb tube fixed(ish), jets fixed at factory height same as other three, new floats arrived, had to make a pin for it, have also found regular mikuni replacement screws too short for the bowls DSC_1747.JPG
    Sure I'll soon see how successful the bodge/ repair has been, tested electrics with new battery, only the licence plate light not working DSC_1749.JPG
     

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  13. Callam

    Callam Member

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    Quick note standard mikuni screws are too short for float bowls!


    DSC_1750.JPG
     
  14. Callam

    Callam Member

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    Also k2 petrol tank repair / stop leak isn't petrol proof

    carbs are being re done
     
  15. Callam

    Callam Member

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    Still doing the carbs on my bike, according to the service specs there bsw26 the gs250fw are bsw24 and the gsxf are bsw 27 received_1654661474681982.jpeg can anybody tell me where the two pipes with t piece joiner goes to? Or if it even is on the GF as this is a gs fw manual when I got the carbs the two were joined without the t piece.
    DSC_1784.JPG
    Have also bought the keyster needles, to replace the old ones, had to get then from Belgium.
    Trying different chemical metal on the tube, I soaked it overnight in petrol and it hadn't fallen apart yet, so hopefully it stays that way, the first tank repairer stuff I got isn't petrol proof
     
  16. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    The T piece you are talking about, does it have hose number 63 coming off it ?
    If so then i'm guessing it connect's to a vacuum operated petcock
     
  17. Callam

    Callam Member

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    In the diagram yes I don't think the gf has a vaccum petcock so that would explain it

    DSC_1790.JPG
     
  18. Callam

    Callam Member

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    3 of the air pilot screws look OK, but one looks like it's been treaded at the end, and tapers inwards, this would cause bad running too?

    DSC_1791.JPG
     
  19. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Ideally i would be replacing that screw if you can

    If you can't find one, the slight taper on the right hand screw may let a little more air through past the o'ring, you could try fitting a slightly thicker o'ring on that side, make sure you use some silicon grease to stop it getting damaged when fitting it though
     
  20. Callam

    Callam Member

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    Found a nos screw but I decided to check them all, need new o rings, 3 springs are the same, there's only one washer and then a load of random bodged springs, no wonder it never ran right DSC_1793.JPG
     
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