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Idles great, no power under load

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    Idles great, no power under load

    Hey guys so I have my bike and it idles fine. I've synced the carbs. Did my best at dialing the pilot circuit. Cleaned the carbs. Set float height. Re jetted for the my my 4-1 exhaust and pods. Replaced the dyna ignition with a new one. (The old was faulty)

    she he idles great and sounds good through all positions. I've done plug chops with the bike on the center stand with no load and the plugs are a nice brown.

    The he problem is there is no power when the bike takes the street. Seem that way through all rpms. I'm trying to figure out if could be an doctrinal problem or a fuel problem. Any thoughts?

    #2
    I have no advice after people put on pods, just the most basic thing: Before spending any money or work check the compression.
    Trouble shoot check list for poor performance at all speeds:
    Ignition: the 77 is an old style ignition system, so check all those components.
    Fuel system: check all those components
    1982 GS1100G- road bike
    1990 GSX750F-(1127cc '92 GSXR engine)
    1987 Honda CBR600F Hurricane

    Comment


      #3
      A doctrinal problem?
      http://img.photobucket.com/albums/v5...tatesMap-1.jpg

      Life is too short to ride an L.

      Comment


        #4
        Originally posted by ttfraz View Post
        I've done plug chops with the bike on the center stand with no load and the plugs are a nice brown.
        Not sure how you would do a plug chop on anything besides the pilot circuit while on the centerstand, but at least you can get that one done. Mainly, it would be reading idle setting only, not "just slightly above idle".


        Originally posted by ttfraz View Post
        I'm trying to figure out if could be an doctrinal problem or a fuel problem. Any thoughts?
        I'm just trying to figure out what a "doctrinal" problem is.

        .
        sigpic
        mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
        hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
        #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
        #2 son: 1980 GS1000G
        Family Portrait
        Siblings and Spouses
        Mom's first ride
        Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
        (Click on my username in the upper-left corner for e-mail info.)

        Comment


          #5
          Originally posted by Buffalo Bill View Post
          Ignition: the 77 is an old style ignition system, so check all those components.
          He stated that it has a new Dyna ignition.

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            #6
            Maybe take it for a ride for a few minutes, then cut the throttle and check the plugs. See if you have one that's fouling or any other clues that might tell you whats going on in there.
            1982 GS1100E "Jolene"

            Comment


              #7
              Well I would let it run for a little bit with a fan at different throttle position just to try to get a ball park with plug chops. I know it's not the same as riding but I figured it couldn't be to far of. I've been through the the whole ignition system already. I just found I have a charging issue tho

              not to mention I was riding it a month ago so I doubt the compression just gave out. But I could check it again. I also guess I could double check the coils now that it has the new ignition. I know it sparks but I don't know how strong. I doubt it's a fuel problem I've triple checked the floats and the fuel flows from the tank on prime no problem. It's kinda of hard to do actual plug chops when it's on the road because it's so weak

              Comment


                #8
                What exactly are the jets you installed?
                Valves adjusted?
                Compression readings?
                Timing advancer working?
                1978 GS 1000 (since new)
                1979 GS 1000 (The Fridge, superbike replica project)
                1978 GS 1000 (parts)
                1981 GS 850 (anyone want a project?)
                1981 GPZ 550 (backroad screamer)
                1970 450 Mk IIID (THUMP!)
                2007 DRz 400S
                1999 ATK 490ES
                1994 DR 350SES

                Comment


                  #9
                  Originally posted by ttfraz View Post
                  Well I would let it run for a little bit with a fan at different throttle position just to try to get a ball park with plug chops. I know it's not the same as riding but I figured it couldn't be to far of.
                  To do plug chops that will give you enough information to adjust your jetting, you need to use 1)IDLE, to check the pilot circuit, 2) 1/4 throttle to check the transition to the needle, 3) 1/2 throttle to check the needles and 4) FULL throttle to check the mains.

                  There is simply NO WAY you can hold 1/4 throttle long enough on the centerstand to get a decent reading on the plugs.

                  FULL throttle? Forget it.

                  Remember, it's not engine speed that determines what carb circuit you are on, it's throttle setting. With no load (bike on stand), there is no way you are going to be off the pilot circuit, even at 8000 RPM.

                  .
                  sigpic
                  mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
                  hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
                  #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
                  #2 son: 1980 GS1000G
                  Family Portrait
                  Siblings and Spouses
                  Mom's first ride
                  Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
                  (Click on my username in the upper-left corner for e-mail info.)

                  Comment


                    #10
                    i checked the valves they are good. Adjusted the timing. Static and with a light after.
                    I havent checked compression yet tho

                    amd my stick jets were 97.5. I upped them to 115 and needle up one position. Pilot is stock but fuel screws out to 1 3/4 and air at 1 1/2 big T

                    Steve I do realize that to do chops correctly it needs to be under load riding but I figured that having no load and testing different throttle position would at least get me in the same ball park

                    Comment


                      #11
                      Yeah, but how do you hold 1/2 throttle for about 30 seconds on the centerstand?

                      .
                      sigpic
                      mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
                      hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
                      #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
                      #2 son: 1980 GS1000G
                      Family Portrait
                      Siblings and Spouses
                      Mom's first ride
                      Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
                      (Click on my username in the upper-left corner for e-mail info.)

                      Comment


                        #12
                        Originally posted by JJ View Post
                        He stated that it has a new Dyna ignition.
                        My bad.......
                        1982 GS1100G- road bike
                        1990 GSX750F-(1127cc '92 GSXR engine)
                        1987 Honda CBR600F Hurricane

                        Comment


                          #13
                          Originally posted by Steve View Post
                          Yeah, but how do you hold 1/2 throttle for about 30 seconds on the centerstand?

                          .
                          I'd start with putting my earplugs in really tight.
                          http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                          Life is too short to ride an L.

                          Comment


                            #14
                            Originally posted by ttfraz View Post
                            amd my stick jets were 97.5. I upped them to 115 and needle up one position. Pilot is stock but fuel screws out to 1 3/4 and air at 1 1/2 big T
                            Fuel screws are WAYYY too far out.
                            http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                            Life is too short to ride an L.

                            Comment


                              #15
                              Way to far you think? Maybe if I was running nice k&n s but I feel like with the cheapo emgos that it was way to lean at stock

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