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Suzuki GSXR250 GJ73A

Discussion in 'Suzuki 250cc In-line 4's' started by ClipperIT5, Feb 15, 2016.

  1. ClipperIT5

    ClipperIT5 Member

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    Hello
    I have just bought a little suzuki GSXR250 GJ73A as a resto project. It needs a a bit of work. Nothing that cant be sorted but i need a little help with an odd few things.
    Firstly the carbs are completely shot and need more work and effort to recover than is reasonable. I am struggling to find the model type of carb fitted they are mikuni's but which version?...asssuming they are hard to source what allternative would be a direct swap? Or does anyone have a decent set.
    Secondly the wiring loom has been butchered. Would a GSXR400 GK73A. loom be a direct swap. I have read somewhere the the GSXR250 is a sleved down 400 engine. Would other 400 parts fit...?
    Any thoughts anyone..
    As side issue the wrong Cdi has been fitted and the coils and leads were all swapped and running to the wrong plugs...
     
  2. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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  3. ClipperIT5

    ClipperIT5 Member

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    Hello Chris
    Firstly thanks for the info.
    Sadly yes the carbs are well gone. They have been butchered even more then the wiring loom. Lots of part missing, mismatched internal parts, broken or damaged internals when someone attempted some "repairs". If they just needed a clean no problem but take my word for it they need a whole lot more then that...on a positive note three of the four could with effort be recovered. The forth or extream RH has by far the most damage.

    The loom could be repaired but again as i am doing a resto a new or unmolested loom would be much more reliable.

    The cosmetics are pretty good. But whoever has worked on the mechinicals has not really known what they were doing. It was sold to me as a non runner due to electrical issue.
    That was due to the loom/wrong cdi and wrong regulator.. I have moded the loom and got the correct reg & cdi. It now has a spark but the carbs are stopping any chance of getting running.

    I wil try the loom info

    Cheers
     
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  4. Joker

    Joker If you want me find Club250 on facebook. Premium Member Contributing Member

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    I have a GJ74A loom, not sure if it's the same as the GJ73A though...
     
  5. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    we have a few members in the UK with baby gixxers, @Simon , can you help out ?
     
  6. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Try the Japanese auction sites like Yahoo. Might be difficult to get them shipped though.
     
  7. Simon

    Simon Well-Known Member Premium Member Contributing Member

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    How do :):):) - got your message about the carb settings - then read the above - compile a full list of parts needed and should be able to send you the whole lot - splitting a bank of carbs now so I've put a few aside - is it standard or sp - both will do the same job but there are differences - wont stop until another of these is back on the road!!!!!!
     
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  8. ClipperIT5

    ClipperIT5 Member

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    Firstly thanks everyone for your input so far..

    Carbs first...easy fix is to find a full working set but given that maybe difficult here is the news on them.

    The bike has been stoud for approximately nine year. It was unprepared for standing so carb internals are all gumed up. Assume orings and seals are all dryed out cracked or will disintegrate when removed.
    So full orings and seals will be required.
    Full cleaning jod needed.
    The main jet and starter jet on the extreame rh carb need replacing as the slot head has been stripped on both.
    The junction pipe between Outside Rh and inner RH is missing. The whole of the air system that mounts into the hose between the out and inner LH hose and the missing out and inner RH hose is also completely missing. An help finding this would be great although i suspect getting the carbs right alone will get it running.
    I believe the bike to be an SP as it has the adjustable fronk forks...help with frame numbers for the Sp would nail that down.

    I will try and add picture but currently the system says the files are to big.
    Its a black un with gold wheels. If that helps.
    Wire loom Re GJ74 to GJ73 my fit but i dont know for sure but i am willing to try it and see...get intouch if it works i will let you all know.
    Regarding the carb bit get in touch and let me know a price etc......
     
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  9. GreyImport

    GreyImport Administrator Staff Member The Big Cheese Contributing Member

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  10. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    A lot of those parts may still be available as OEM. I am sure that if you are patient a second hand set will show up on the Japanese auction sites but it might be very difficult to get them shipped.
    I have the seal kits and Partzilla seem to have some parts for example
    http://www.partzilla.com/parts/detail/suzuki/SP-13684-20C10.html
    cheers
    Blair
     
  11. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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  12. ClipperIT5

    ClipperIT5 Member

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  13. ClipperIT5

    ClipperIT5 Member

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    20160217_163604-800x450.jpg 20160217_211006-640x360.jpg 20160217_210949-480x853.jpg 20160216_170220-800x450.jpg
     
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  14. ClipperIT5

    ClipperIT5 Member

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    20160217_211324-800x450.jpg
     
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  15. Simon

    Simon Well-Known Member Premium Member Contributing Member

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    Floats removed with needles for cleaning?? Or missing boss..you can remove the jets off the far right hand carb with a junior 'pipe wrench'..the jets are about a tenner to replace (NOS)..alternatively I can give you the whole jet housing from a carb - its a take off bolt on job taking no more than a minute - pm me with a full list of what your after or call me tomorrow on 07830084917..full set of carbs rebuilt might be cheaper..yours is a standard model (non sp) looking at the fork preload adjusters..sp model no's are GJ73a-101266~, non sp GJ73A-100001~. Easy identifiable differences are fully adjustable front forks on the sp (preload, rebound, damping) as opposed to preload only on the standard bike, also the rear shock will have an independent reservoir located on the right rear (exhaust side) of the bike if its an sp - pre load rebound and damping or preload on the shock only via a c spanner if its standard. Your carbs are definitely BDST 29...just tell us what you need buddy,

    Cheers, si
     
  16. Simon

    Simon Well-Known Member Premium Member Contributing Member

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    Bike is....grrrrrrrrrrrrrr..a gixxer 250..welcome to the clan!!!! :):):)
     
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  17. ClipperIT5

    ClipperIT5 Member

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    Cheer Si
    I will be in touch...float bowls removed for internal inspection....parts needed will be listed asap.
    I agree having done a little further reaserch it is not an SP but frankly that is only a side issue..
    I have worked on a lot of bike and this one on the face of it is simple enough it is just a shame someone has lost ...misplaced or been dam right lazy in loosing some key parts..
    But i have to say i am beginging to bond with this little GXSR..
    I will get updating as i make progress..next up are the brakes..fronts are already stipped the rear seem to havevan unusual mount as it is a solid mount direct onto the spindle..not like other suzukis mounted onto a bracked that goes on the spindle...so the wheel has to come off..
     
  18. Simon

    Simon Well-Known Member Premium Member Contributing Member

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    How do fella..got a 73a loom here taken off a running bike..it will need a few bits put back on (rear tail light connectors) and the positive to the battery but it deffo works..also got three carbs which are 95pc complete off a 19000km bike..there 1989 bdst 29, gsxr 250 rk the same as yours..but have got you a full set of carb interconnects..all bar one is in good nick..you can have the whole lot for 80£ plus postage ..I can do you a full bank of rebuilt carbs..new seals from Litetek..ultrasonically cleaned and set up to as new specs..but they won't come cheap as they take me around ten hours to do properly..basically as new mechanically..let us know how the builds going buddy..if your close love to come and take a look :):)
     
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  19. Simon

    Simon Well-Known Member Premium Member Contributing Member

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    Forgot to mention a 74a loom and 73a loom are identical :)..gsxr 400 loom is totally different m8
     
  20. ClipperIT5

    ClipperIT5 Member

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    Hello Simon

    Thanks for all the information..here is where i am at.
    I have repaired the loom i have or ar least sorted out the clearly obvious defects. It will be refitted with the coils on the correct sides and the hdt leads going to the right cyclinders. I have a correct cdi and regulator now so i think any further issues will be within the loom itself...i dont hold out much hope but will give it a try and see. In which case i will take your loom of you no bother....
    Regarding the carbs...i am in two minds
    So here goes.
    Give me a price for the full reconed set.
    Or if you want i will text and you can confirm the price..
    I think to rebuild my carb because of the lack of use over the 8 or nine year that the bike has been stoud, everything will need replacing. How about taking mine in part ex at least you can get another set up and running and maybe make a few quid...
    The rest of the rebuild is going good...brakes will need work but nowt new there but nothing too difficult.
    The body work is pretty good apart from the tank...i will be in the market for a black one pretty soon...
    I normally dont take long over restoration...i have just done a Yamaha TZR125 4DL Belgarda which i sold to a two stoke enthusiast. My latest was a Suzuki RG125F (Fun) Gamma again i recently sold this to a local RG nutter..
    I have sat waiting for some attention a ZXR400 H1 which will be an esay restoration apart from bodywork..
     

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