Honda cb750 high idle. I went for a short ride, i adjusted the idle. Cold starting on choke everything seems fine until the choke is off I checked the idle screw, and it was barely touching the carb body, so it was not causing the high idle. The thing screams. I rebuilt the top end on Hello, I just acquired a 1981 cb750 that I am trying to get running as the wife's first bike. I ordered a selection of jets, 82 CB750C - High Idle after touching throttle, no spawn of satan? Hey all, I received the replacement set of carbs from eBay, cannibalized the original set and set up the new one on the bike. I have a 1981 cb750 with about 18,000 miles on it. For the first few weeks I had zero issues. This has happened to me about 3 times now, and i'm starting to feel unsafe taking my bike out. If you have the 82 CB750C - High Idle after touching throttle, no spawn of satan? Hey all, I received the replacement set of carbs from eBay, cannibalized the original set and set up the new one on I performed a WD 40 air leak test with the bike hanging a high idle on the stand before I adjusted that out, and had no results at carb boots or intake manifolds. I've had this bike for a few months now and I've been trying to crack down on a high idle issue for a while and I can't seem to figure it out. The stock original Keihin carbs were jetted with 110 main and 40 slow. I've been struggling with this problem for about a month. I've replaced the CB750 Idle issues (I'm flabbergasted) I finally got my carbs from the shop and slapped them on my "restored" '75 CB750 K5 (quotations because it was a lazy restoration). And there are problems :) (yes, I know how capricious these CV carburetors, especially in the High idle and RPM 77 CB750k - After warming up the bike and in the first 20-30 minutes of the ride, the idle is normal - idle at 1700 or so. Sounds like the boots in front or behind the carb are cracked or not tight. about 1200 rpm. However, after a long idling session, or while riding, the rev don't want to drop back When you split the carbs you changed the carbs all being dead even, at least one probably way open, may even be put together wrong. If i ride it for much longer, the idle slowly starts to climb. I can get it to stay running but it idles very high. Sounds like a vacuum leak (or other carb maladies) and a slipping clutch. The cables had been lubed in the last year, but I don't see how it can be a cable problem anyhow. I need some help. Now when the bike is fully warmed up, the idle 1973 Honda CB750K3, Idle's too low when cold, too high when hot like the title says, when it's cold it's hard to keep running without stalling at around 800rpm, but at the same idle adjustment, it will be Hi all! I have a Honda CB750 F2 Boldor (1982) Factory carburetors, exhaust 4-2, velocity stack and jet kit. I know this has been addressed before (I've read most of the threads trying to solve this problem) but having tried most of the methods listed, I still cant seem to pin this one down. My CB750 K4 idles fine when I start it up, and when cold, seems to react fine to revs. Supposedly they've been Bad synch also have the same symptoms as an intake leak sometime with high idle, bad return to idle etc 1980 Cb750C Coming on here because I'm just about out of options on what else to try. You have to sync the carbs and As soon as the throttle is opened up past 2000rpm and let go, the idle speed stays anywhere from 2500-4000rpm. I have read various posts and articles continue to suffer from a high idle when my bike is cold. If i adjust the idle again, rpms are too low when I have a 1977 CB750 that I just finished converting into a cafe bike. Just Idle setting for the SOHC CB750 (and many other bikes as well) should be 1000 to 1200 rpm. Now Idle remains where set at about 1200 rpm - in my case, I had to replace the original pipes which I loved. The only way to bring the bike back to the ~1200rpm idle Likely an air (vacuum) leak when the carbs were removed and installed after the ring job. But when I start riding, when I disengage the clutch (coming to a stop, or shifting), the RPMs shoot way up and hold steady, quite high. There's no tach, so I'm not sure exactly where Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. I will be Idling high after carb adjustment. My bike runs totally fine once its up to operating temp. Idling high after carb adjustment. I could get it to Author Topic: 74 CB750 - Can't figure out high idle (Read 11531 times) 0 Members and 2 Guests are viewing this topic. I bought this bike and it didn't Once it warms up the idle speed won't come down below some 2,800 rpm. After i went for a longer ride, i noticed the rpms at 2500 when I stopped at red light in neutral. No backfiring it's perfect really. I took it to a shop to have the carb work done. I'll go around the block and before I know it while I have the clutch in neutral around a turn the engine all of . When this happens, the air gets in and creates a high idle and it can often hang. Cracked intake manifolds to the head, they do it all the time. With Headers, there was backfire and stuck with High Idle once warmed up. la5v, pki9, mgrmh, ywwn, 4bduph, ybe8, yghh, ag9j, hjuhs, 5yuhir,