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Jetting for 84 550ES

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    #1

    Jetting for 84 550ES

    I bought a Vance and Hines Pipe off of eBay, cleaned it up and it is at the media blaster right now. I am going to have it finished by Jet Hot. I also got a set of nearly new stock cams (they spec out at new specs). I just finished a set of mikuni two-barrel carbs that I got on eBay as well. It looks at best I can tell that the old jets are 95's on cylinders 1 and 4 and 102's on 2 and 3.

    Are these stock size? if so what should I buy to run the bike with the vance and hines pipe???

    Thank you!
    Tags: None
    #2
    those are the stock sizes. 95 and 102.5 actually.

    You might consider going up one size on the jets... But since it's JUST an exhasut, you should be ok. Why did you buy new carbs? and new cams?
    You'd have to be crazy to be sane in this world -Nero
    If you love it, let it go. If it comes back....... You probably highsided.
    1980 GS550E (I swear it's a 550...)
    1982 GS650E (really, it's a 650)
    1983 GS550ES (42mpg again)
    1996 Yamaha WR250 (No, it's not a 4 stroke.)
    1971 Yamaha LT2 (9 horsepower of FURY.)

    Comment

      #3
      I bought the used carbs for parts. They are actually in great shape and paid $40 for the pair. Just one for these run about $95 and the two in these carbs and ths slides are in better condition than the ones on the bike now. My cams are measuring out near the service limit so I want to replace them when I do the boring and new pistions. Got both for $100 including shipping. I'll try your advice and go up one jet size in the two carbs that I am rebuilding with parts from both sets. I have heard that there were some hotter cams made for this bikebut I suppose they whoever made them that they are probably unobtaniam these days . Do you know if that is true, and thank you for your answer.

      Comment

        #4
        Nerobro, what I meant to say is that one of the diaphram assemblies in these CV carbs cost about 90-95$ and many of the parts are not available anymore on parts fische. I have to got to start proof reading my threads before I hit the submit button. I see that you are a senior member. I bought this bike 5 years ago for $200. I had the transmission fixed (2nd gear) and rode it a bit, but spent more time on my cruiser and this bike was ridden by guests coming to the Oregon coast to visit. Two months ago I put it up for sale but had little interest, and in the process of cleaning it up and waiting for a buyer, I sort of fell in love with it again and since I will be retiring in 16 weeks, I have decided to go through it and bring it up to snuff and perhaps find a few HP for Track days and doing the twisties in the back country of the Oregon Coast. I am a project sort of guy so I am eager to see what I can do with this bike with a little help from folks such as you. I also want to surprise my son's who got me into riding, and have always wrote of this old Suzuki

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          #5
          I happen to have a set of those hot cams in my house. :-) Yoshimura made them. I've been tyring to contact them to get the full specs on them, as i just got the cams, nothing else.
          You'd have to be crazy to be sane in this world -Nero
          If you love it, let it go. If it comes back....... You probably highsided.
          1980 GS550E (I swear it's a 550...)
          1982 GS650E (really, it's a 650)
          1983 GS550ES (42mpg again)
          1996 Yamaha WR250 (No, it's not a 4 stroke.)
          1971 Yamaha LT2 (9 horsepower of FURY.)

          Comment

            #6
            Good for you Lucky Dog If I happen to hear anything on the specs I'll let you know. I have googled for any info on them and have come up with nothing so far. I know that one thread talks about these cams going into a guy named skreemer's bike perhaps you can get some info from them. I believe it is under performance mods and titled GS550ES.

            Tom

            Comment

              #7
              erm.. yeah. I live with skreemer.
              You'd have to be crazy to be sane in this world -Nero
              If you love it, let it go. If it comes back....... You probably highsided.
              1980 GS550E (I swear it's a 550...)
              1982 GS650E (really, it's a 650)
              1983 GS550ES (42mpg again)
              1996 Yamaha WR250 (No, it's not a 4 stroke.)
              1971 Yamaha LT2 (9 horsepower of FURY.)

              Comment

                #8
                OOPS I guess you are back to square one on the cam info tom

                Comment

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