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Any ideas why my bike looses power at freeway speeds (cont)?

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    #31
    Yes, it should probably have a lid. Put duct tape over that top access hole and see if it makes a difference.

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      #32
      Originally posted by earlfor
      Very few new owners even know there are "O" ring seals on the flanged induction rubbers and that they dry out and leak with age. You're right, seal the leaks, even if they appear to be small and you cant imagine them making any difference? They DO! :-) :-) :-)

      Earl
      If your bike has an air leak, wouldn't that show up on your plugs as a lean mixture?
      I seem to be having the loss in power between 4-6K rpm at highway speeds SOMETIMES, and not always at the exact rpm each time. Turning on the choke does nothing, but letting off or giving it throttle brings it out of that slump. Pulled the carbs, they are squeaky clean, floats are fine, and they have been synced. Number 3 plug sometimes soots up, and the other ones are fine. The bike has a Jardine header and el cheapo pods. It has a Boyer Bransden ignition and mechanical carbs. It ran fine for YEARS, but now is acting weird. :? It's off the road for a few more months, so I can't do any road tests. Ideas?
      Kevin
      E-Bay: gsmcyclenut
      "Communism doesn't work because people like to own stuff." Frank Zappa

      1978 GS750(x2 "projects"), 1983 GS1100ED (slowly becoming a parts bike), 1982 GS1100EZ,
      Now joined the 21st century, 2013 Yamaha XTZ1200 Super Tenere.

      Comment

        #33
        Originally posted by earlfor
        Very few new owners even know there are "O" ring seals on the flanged induction rubbers and that they dry out and leak with age. You're right, seal the leaks, even if they appear to be small and you cant imagine them making any difference? They DO! :-) :-) :-)

        Earl
        If your bike has an air leak, wouldn't that show up on your plugs as a lean mixture?
        I seem to be having the loss in power between 4-6K rpm at highway speeds SOMETIMES, and not always at the exact rpm each time. Turning on the choke does nothing, but letting off or giving it throttle brings it out of that slump. Pulled the carbs, they are squeaky clean, floats are fine, and they have been synced. Number 3 plug sometimes soots up, and the other ones are fine. The bike has a Jardine header and el cheapo pods. It has a Boyer Bransden ignition and mechanical carbs. It ran fine for YEARS, but now is acting weird. :? It's off the road for a few more months, so I can't do any road tests. Ideas?
        Kevin
        E-Bay: gsmcyclenut
        "Communism doesn't work because people like to own stuff." Frank Zappa

        1978 GS750(x2 "projects"), 1983 GS1100ED (slowly becoming a parts bike), 1982 GS1100EZ,
        Now joined the 21st century, 2013 Yamaha XTZ1200 Super Tenere.

        Comment

          #34
          As it stands now

          I am investigating the 'what, it's supposed to have a lid?' angle...

          I aquired a lid and a new filter from ronayers.com, installed them, and am now wating for good enough weather (i.e. no snow or rain on the roads) to go for a test spin...

          Unfortunately, I dropped the bike on it's RH side cover (that I had left on the ground next to it) while trying to get it on the centerstand... So I'm looking for a new sidecover, and I'm not about to pay BikeBandit $50 for one... In the mean time, the old one is getting jigsaw-puzzled back together with epoxy...

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