+- The CB1100 Community Forum (https://cb1100forum.net/forum)
+-- Forum: Honda CB1100 Discussions (https://cb1100forum.net/forum/forumdisplay.php?fid=5)
+--- Forum: Mechanical & Technical (https://cb1100forum.net/forum/forumdisplay.php?fid=7)
+--- Thread: Honda CB1100 Rough Idle Solution (/showthread.php?tid=4221)
RE: Honda CB1100 Rough Idle Solution - Johnnb_imp - 06-26-2020
I have this unstable idle problem on my 2014 CB1100EX owned from new and it's rubbish.
I also have had a clunk from new from the front end going over bumps, rotors that heat up even after caliper service and loads of other issues with spoke corrosion and paint flaking off the engine.
New £10,200
Worth it.
Absolutely NOT
What a flop
RE: Honda CB1100 Rough Idle Solution - Charlie Bravo_imp - 06-29-2020
(06-26-2020, 06:38 PM)Johnnb_imp Wrote: I have this unstable idle problem on my 2014 CB1100EX owned from new and it's rubbish.
I also have had a clunk from new from the front end going over bumps, rotors that heat up even after caliper service and loads of other issues with spoke corrosion and paint flaking off the engine.
New £10,200
Worth it.
Absolutely NOT
What a flop
Welcome to the best forum on the WWW! Your experience is atypical, to say the least. I'm on my fourth Honda bike, and third Honda car, and have never had problems like that. I hope you can get that sorted.
RE: Honda CB1100 Rough Idle Solution - LakeWylieJoe_imp - 06-29-2020
Dickie, are there any scuff marks on the bottom of the Corbin seat pan that would suggest it's putting a load on something it shouldn't?
I concur with your idea of putting the bungees back in first to see what happens. Keep us posted.
RE: Honda CB1100 Rough Idle Solution - dickie1951_imp - 07-15-2022
I am back working on my oscillating idle problem. I spent most of last year dealing with a health issue.
All the previous changes that I tried did not fix my idle problem. The problem continued to occur on days of around 80 degrees F or warmer, especially in stop-and-go city traffic.
My two latest changes may have fixed the problem. I have not seen the idle oscillation problem in the last several weeks of riding almost every day. These are my latest changes to fix the idle problem.
1. I turn the ignition on without starting the engine, fully open and close the throttle three times, then turn the ignition off. It is my understanding that the TPS (Throttle Position Sensor) is a variable resistor much like the volume control on an old radio. This resistor may get dirty or worn, and needs to be cleaned or recalibrated for a smooth idle. I hope the three throttle twists do both.
2. I then turn the ignition on, wait 5 seconds, and start the engine. This should give the ECM (Engine Control Module) enough time to successfully complete its software initialization.
I will post if and when the oscillating idle problem returns after making these changes to fix it.
RE: Honda CB1100 Rough Idle Solution - 1973cb750 - 07-15-2022
mine will do weird things if i dont notice my clutch is pulled all the way in i think a good clutch bleed may help some of these issues not all but some
RE: Honda CB1100 Rough Idle Solution - dickie1951_imp - 07-15-2022
All of my idle tests were done with the transmission in neutral and the clutch released. With my latest changes in post #34, I have not seen the oscillating idle problem.
RE: Honda CB1100 Rough Idle Solution - Nachodaddy - 07-15-2022
(07-15-2022, 09:56 AM)dickie1951_imp Wrote: All of my idle tests were done with the transmission in neutral and the clutch released. With my latest changes in post #34, I have not seen the oscillating idle problem.dickie1951, I had the fast (2000 rpm) idle problem which went away when I followed Peterbaron's method of re-setting the ECU. Basically, you take the leads off the battery and connect them (making sure to keep them AWAY from the battery) for 15 minutes. I know nothing about how or why this might have resolved the problem, but it did.
Before the re-set, no matter what I did, the bike would idle at 2,000rpm. Now it is back to idling at 1100. Just something to consider if your problem returns. Costs nothing and won't hurt anything.
RE: Honda CB1100 Rough Idle Solution - dickie1951_imp - 07-15-2022
Thanks for the suggestion. I will add it to the list of possible next solutions should my latest fixes in post #34 not hold up.
I have never had a fast idle problem. My idle problem has always been: oscillating from 1100 RPM, then down to 700 RPM, and back up to 1100 RPM every second or two. This would continue for as many minutes as it took for me to return home and shutdown the bike.
RE: Honda CB1100 Rough Idle Solution - 1973cb750 - 07-15-2022
Thats what mine does if im sitting at a light too long and i leave the clutch out just a bit to far and if i pulled it tight to the bars it will idle normal its like that iac is trying to keep in from stalling just my experience probably nothing to do with the issues others are having just a observation
RE: Honda CB1100 Rough Idle Solution - CBob1963_imp - 08-28-2023
(07-15-2022, 11:19 AM)dickie1951_imp Wrote: Thanks for the suggestion. I will add it to the list of possible next solutions should my latest fixes in post #34 not hold up.
I have never had a fast idle problem. My idle problem has always been: oscillating from 1100 RPM, then down to 700 RPM, and back up to 1100 RPM every second or two. This would continue for as many minutes as it took for me to return home and shutdown the bike.
I’ve been experiencing this same issue with the 1100-700 idle on my 2014 CB1100. Someone mentioned low idle could be vacuum leaks so I started checking tubes, hoses….when I discovered that all 8 screw clamps that connect throttle body to intake were loose, I’m talking 8-10 turns each before they felt like they were tight. Time will tell, but ever since idle has been steady at 1k, no oscillating. Maybe combination of heat and vibration causing leak???
Will try to attach pic of 1 side which will show 4 of 8 screw clamps that I’m referring to.