New pipes, or re-jet.

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  • capnjim
    • Jan 2026
    #1

    New pipes, or re-jet.

    Howdy ho everyone! Its spring! Time to start up the bike. '77 GS750 all stock.
    Here's the problem, the baffles rotted out of the pipes. She won't run smooth over 5k RPM. The pipes still look amazing, chrome is shiny and nice. I'm in Canada so buying new pipes is ridiculously expensive. Its not even that loud, will a re-jet help it run better after 5k?
    Cheers!
    Tags: None
    • Guest
      #2
      I brought a full set of 1000 pipes, to my door for $170, not a horrible price considering it came from Florida to BC. In the past I had a set of Dunstall mufflers welded to the headers on a 79 750. Dunstalls cost me $120 plus shipping, and the welder charged me $80, so probably $240 in the end or something like that. I'll keep buying and shipping stock systems for now. Beside the Dunstalls were too loud for me.

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        • 850 Combat
          Forum Guru
          Past Site Supporter
          • Sep 2006
          • 6018
          • Spokane, WA, and Hampden, ME
          #3
          The pipes rotted out on one of my 850Gs. It still was quiet and tan great. There were big holes about a foot from the end. I'm not certain that the pipes are your problem.
          sigpic Too old, too many bikes, too many cars, too many things

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            • capnjim
              #4
              Originally posted by 850 Combat
              The pipes rotted out on one of my 850Gs. It still was quiet and tan great. There were big holes about a foot from the end. I'm not certain that the pipes are your problem.
              Hmm...mine is still pretty quiet. So without bafffles, the bike can still run well?
              The thing is, I have followed every step on Cliffs website for carbs and air. The only thing I didn't do is install my new CDI and regulator. I suppose it could be old points, weak spark? I do only get 12v at the battery when revving.

                Comment

                • Crankthat
                  #5
                  Originally posted by 850 Combat
                  The pipes rotted out on one of my 850Gs. It still was quiet and tan great. There were big holes about a foot from the end. I'm not certain that the pipes are your problem.
                  What he said.

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