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Search results

  1. W

    GS550 with Mikuni Dual Throat Carb, No Info

    UPDATE: Carbs are sealed up, intake sealed and tight and a nice bath and blow dry heat (and a touch of lithium grease) the carbs seated really well. Bike fires up just like a jap bike should, even with non-compliant exhaust and intake.. It is running like it used to again. Gonna leave...
  2. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Yes indeed, I did that a lot back in the day with my SOHC Honda 750's I went to the owners parts engine and retrieved a decent right side intake boot. Online searching I put in an order for Intake boot o-rings 4 bowl drain seals...
  3. W

    GS550 with Mikuni Dual Throat Carb, No Info

    I put o ring on the crossover fuel tube, the float valve seats and drain plugs.. only ones I didn't appear to be the ones for the choke (enrichener?) plunger.. Got up today to try to get the intake to seal up, but no luck. The right side carb has a slight bit of gas weeping from the tiny air...
  4. W

    GS550 with Mikuni Dual Throat Carb, No Info

    [No message]
  5. W

    GS550 with Mikuni Dual Throat Carb, No Info

    [No message]
  6. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Cleaning
  7. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Ignition
  8. W

    GS550 with Mikuni Dual Throat Carb, No Info

    UPDATE: Nothing I did helped the stuck screw. I located another set of carbs though!!!!! Mated them together after a good cleaning, by hand then ultrasonic... I got the bike running with the enrichening cable pulled out some but seems like there was a air leak around the intake boot...
  9. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Well needless to say I got burnt out on this project and still am. I finally got a 14K gold testing bottle of Nitric acid (said to dissolve brass and leave aluminum pretty untouched) and have been trying rounds of that today. Not really reacting to the screw much and so far no results. A few...
  10. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Well the top 2/3 of the air mix screw is drilled out, but the remains and what looks like a washer are STUCK AF still, my neighbor tried to help but the tapered needle seems to have moved slightly downward into the carb body. I cant make any progress. And the 0.5mm pitch fine threading is...
  11. W

    GS550 with Mikuni Dual Throat Carb, No Info

    I can see that the heads are not set up to take a four carb intake, so that is out of the question. I have to assume that's all began with someone using the wrong size washer under that air fuel screw.
  12. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Continuing nightmare. I drilled out that air screw as best I could and managed to get the threaded portion completely out, the needle part of it moved downward into the car body but what I see is part of the shaft and the washer or hopelessly seized in the hole. I'm just looking at them now and...
  13. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Great diagrams in the FSM, nice to have the link The first real deal-breaker may have popped up though, 1 of 4 fuel air mixture screws is stuck in carb. All 4 look like they have been mistreated but this one has less of the slot left and is not bunging so far. Couple cycles of PB Blaster, then...
  14. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Well the crossover tube between carbs is easy to see and the image in manual describes that fitting as breather tubes, nothing in the emissions chapter on the actual breather type or location.
  15. W

    GS550 with Mikuni Dual Throat Carb, No Info

    [No message]
  16. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Hmm.. I think it may be a vacuum petcock fitting actually. This tank is not using one. I will cap it later.
  17. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Well it may not be easy or fun to work on but this is someone's chopper that they put a lot of effort into so I've got to try my best, up to a point of course
  18. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Also the parts diagram does not specify what this fitting is I would assume it is event for the bowls, it looks like it used to have a hose coming off of it that rotted Off
  19. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Well I was away for work but I'm back now looking at the carbs and getting ready for a deep cleaning, there were two hoses just venting to the atmosphere on each of these fittings which seems like on a lot of old Japanese bikes they should be connected to each other
  20. W

    GS550 with Mikuni Dual Throat Carb, No Info

    Hold the phone.... The carbs in the tutorial from ghetto racing have different slide assemblies with plastic parts and springs. The service manual linked shows the slides I am dealing with that are metal, four screws, NO SPRINGS... I am curious hoe they function to return slide and needle at...
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