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high idle

  1. 1974 CB450- High idle after bench syncing carbs

    Fuel Supply and Carburation
    Hey all. So, after pulling my carbs to bench sync them yesterday using the guitar string as feeler gauge method, as per Common Motor Collective's Youtube channel, my bike started right away, but rpm's starting shooting way up past 6000. I backed off the idle screws on each carb equally until...
  2. 81 cm400t high idle - air mix screw fully unscrewed

    Fuel Supply and Carburation
    Few things done this weekend, changed oil+filter, gear shift shaft seal as had a small leak (man was that one tricky, i knew i must not pry it even if someone was prying it before so almost gave up, at last a pointy drywall screw made the job!!but must be very pointy to drill through the...
  3. CB175 Idling Inconsistent

    Engine Discussion
    what's up. so i have a 1971 CB175 that I bought a while ago and got running. (i'll list what i did below). but now it's either (1) idling way too high (4-5k) and fuel adjustment screw doesn't respond, or (2) idling too low and shutting off (will stay running if throttle used), or (3) most...
  4. Very High Idle CB450

    Fuel Supply and Carburation
    Hi everyone, hope you're enjoying the summer. After a long pause trying to source a new cylinder head, I've been working on my CB450K6 again and trying to get it on the road. I've searched and read all the high idle threads I could find and I've tried the fixes I read about. I put everything...
  5. 1976 CB360T Fast Idle/Exhaust Popping after Warm

    Fuel Supply and Carburation
    Hi Honda Twins forum, I am having a little bit of issues with my CB360 with the original Keihin CV carbs. My bike starts on the first couple of cranks when cold and idles at around 1000 rpm and runs wonderfully through the whole throttle range. However after driving it for a bit (10-20 minutes...
  6. 1976 CB200T Throttle cable is out of control!

    Fuel Supply and Carburation
    Hello guys, I'm working on a 1976 CB200T. The previous owner had the slides in the wrong carbs. I've got them oriented correctly now and on the correct sides of the bike. I dialed in the idle-stop and idle-air mix screws and it was running fantastically, idling around 1400 RPM. I started to...
  7. CB200 Throttle Cable Lengths

    Fuel Supply and Carburation
    Hi all, I've been having a problem with my idle speed, but I believe I have narrowed it down to my throttle cables. My left carb does not fully close with throttle, right carb works proper. I disassembled the throttle cable and discovered that the left cable, after the splitter, is too short...
  8. CB200T choke problem, PLEASE HELP!

    Fuel Supply and Carburation
    Hey guys, I have a '75 Cb200T and it's having some problems. I'm new to the forum so I apologize if anythings out of order. I can start the bike but it revs high right away and will stay and idle at around 4,000 rpms (I know that's a lot higher than it should be and I've tried looking for vacuum...
  9. New to bikes and forum. 1978 Honda CM185T Twinstar

    Miscellaneous Discussion
    I recently purchased a 1978 Honda Twinstar, the 181cc engine variant. It had been started just over a year prior and has been garage kept since. It runs with a good kick, and some fooling around with the choke -- but that is where the problems start. After running for maybe 5 seconds, it does...
  10. 1982 CB450SC idle at 2500+ rpm

    Fuel Supply and Carburation
    [This is my first post, I hope i'm not giving too much info... I think most of it is necessary for diagnosis. Thanks for reading!] Going on my 3rd season with this bike. I bought it with 17,500 miles on it; I did almost nothing to it the first season. Before 2nd season I did carb cleaning...
  11. New Guy - Project 79 CM185T

    Member Introductions
    Hello everyone, I'm new to the forum and looking for some general advice. Apparently this is where all of us greenhorns introduce ourselves. My 79 Honda Twinstar is my first bike project. I'm super excited about it and am very eager to learn all I can. First off, I am attempting to make a...
  12. 1976 CB500T High Idle

    Engine Discussion
    I apologize if this has been addressed in a previous thread I couldn't find a similar issue. I have recently acquired a 1976 CB500T in great shape (8500 miles). The bike starts up every time, even when its below 50 F in the cool North Dakota mornings. I hardly have to use any choke, if I do it...
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