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Rake

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Posts posted by Rake

  1. 14 hours ago, wraith said:

    I just glued mine back on

    Apparently been glued so many times it’s now bunged up and needs a more permanent repair. Obviously another float bowl with fox it but finding one is like hens Teeth

  2. 10 minutes ago, Dezza said:

    1100 or 750? I think the 1100 L and K both use BST36s so yes for the 1100. For the 750s, the spacings are the same so with the L rubbers they will go on. They may squeeze on with the K rubbers but you'll have to try and see. The BST38s from the L are fairly tall carbs and the 750K has the DOT head which angles the carbs up a little (see previous pages here) so you may run into clearance issues. Maybe someone who has tried this will be along later with more detailed info :).

    Thanks for the reply - just to be clear it’s the 750 L carbs going on a 750K 

    thanks

     

  3. 20 hours ago, Buzuki said:

    IMHO those carbs are in very bad condition and they ask for complete overhaul , obligatory all those internal O-rings need to be replaced , check for correct valve clearance also, and for good sealing between 4 carbs rubber boots and cyl.head .

    Checked sealing by spraying wd40 over rubbers which had no effect.

  4. 21 hours ago, TonyGee said:

    i would say it could be a pilot jet blocked or the float valve is leaking.  but i would investigate the compression isue as well, 100 psi is not the best reading O.o  did you have the throttle wide open when you did the test ? and the engine should be up to temp if possible. 

    The engine was cold on the compression test. Throttle was closed.

  5. Evening all.  I picked up a 1989 750 K non starter that had been laid up for some years. I found it had no spark which turned out to be the CDI unit. Replaced it and got her to start but she will only run on 3, pot 3 being the naughty one.

    occasionally pot 3 comes in but it’s intermittent.

    I see fuel coming out of the carb breather tube as a dribble. 
     

    she will start and run on choke but turn the throttle and she dies. Once warm on choke I can start her without choke but the throttle has to be wide open to get a start. I can keep her running if I good the throttle partially open but she does if I drop to idle speed.

    I did a compression test but I’m not 100% happy with the fitting of the tester - the adapter kind of wobbles in the plug hole. Pots 1 2 and 4 give around 100psi pot 3 gives a very low PSI reading. I was kind of hoping that it was a tester issue or stuck valve that would free up with some running of the engine. I have not yet repeated the test since having run her up.

    here is a video of her 

    https://youtu.be/R4TaK2QD5cw

    I’ve taken the carbs off to clean them but would value some help on whether this could be a carb issue or something else.

     

    thanks in advance 

  6. On 9/26/2021 at 6:09 PM, TonyGee said:

    if you are getting a pulse at the ign coils then it sounds like the pulse coil is sending a signal to the CDI and then on to the ignition coils !!!!   have you tried new plugs ? 

    Hi Tony - sussed it out - no pulse from CDI so tried another CDI - got spark. Many thanks !

    • Like 2
  7. Hi all, good thread. I’m having similar issues  on my 1989 GSXR750.

    when connecting a test bulb to the coil wires - no pulse. Change CDI to a spare and then get a pulse ok but still no spark.

    testing resistance on the pickup wire is 171 ohms when not cranking and flickering open circuit when cranking. No resistance.

    I do have 12v on orange at the coil. All wires between coil and cdi have continuity.

    B/W to chassis is 0.3 ohms.

    so is the open circuit while cranking at the pickup connectors pointing to the pickup being faulty ?

  8. Interesting - there is little or no reason other than cosmetics to pull it appart.

    Its quite oxidised in places and I was under the impression that to clean it or vapour blast it I would need to strip it down ?

    I'll get some close ups and see what you think

  9. Just embarking on a 750L restoration project and am also researching paint available in the UK for the engine but I would like the stock grey colour.

    the ones discussed in say what now!?.com are all USA so cant get them here so would appreciate any suggestions.

    I gather complete engine dissassembly is required to do this right.

    What / how had people prepped the engines with ? I was considering vapour or bead plasting ?

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