The CB1100 Community Forum

(01-12-2015, 06:51 AM)HikerToo_imp Wrote: [ -> ]Maybe DynoJet would know why they are so different? Between 2013 and 14
Also, I forget, did you have a full exhaust on your 2014? If so, maybe ECU was compensating for it, so their PCV had to cut back a little on fuel mixture?

That's possible, however, I was told they could not do an apples to apples comparison because of my modified exhaust. I have a Yoshimura slip-on, not the full exhaust. I don't know if it's possible to accurately account for and isolate the differences caused by the slip-on but your thought about the stock ECU compensating sounds spot on.

CIP, here are some charts from my dyno runs in May 2014 (stock ECU).

I did a baseline run totally stock and returned a few days later with a full Yoshi exhaust and TSR air funnel installed. That day we did several runs:
Run #1: Yoshi exhaust, TSR air funnel, 02 sensor bypassed
Run #2: Yoshi exhaust, stock air intake, 02 sensor connected
Run #3: Yoshi exhaust, stock air intake, 02 sensor bypassed

The first, stock, baseline run was done in 4th gear, the second day runs were done in 3rd gear to keep the rear wheel speed limiter from cutting in before the RPM limiter.

I cleaned up the charts slightly as the operator placed some notations on the curves and I edited out the 1/4 and 1/2 throttle run curves.

Since press reports on max HP vary by quite a bit, it's not surprising that my charts are lower than others posted here. My dyno operator was very tolerant of me making mechanical changes to the bike while it was sitting in his rig, but the lack of dramatic differences was surprising. I keep hoping someone will do something similar and "disprove" my results!

Greg and CIP, thanks for sharing those charts. At first glance I thought it was running very lean compared to my bike (at least at the lower rpm's) but then realized the AFR scale differed between our charts. In stock form, you were definitely lean but with the full Yoshi and tune, it really isn't that far off from what I'm seeing on mine. It does appear that once I get passed 2K rpm, I never go higher than 14:1 AFR and stay pretty darn close to 13.2 to 13.5 throughout, even past 6K rpm where you appear to go rich.

What to make of the difference in our numbers? I still have no idea.

(01-13-2015, 04:29 AM)metallyguitarded_imp Wrote: [ -> ]Greg and CIP, thanks for sharing those charts. At first glance I thought it was running very lean compared to my bike (at least at the lower rpm's) but then realized the AFR scale differed between our charts. In stock form, you were definitely lean but with the full Yoshi and tune, it really isn't that far off from what I'm seeing on mine. It does appear that once I get passed 2K rpm, I never go higher than 14:1 AFR and stay pretty darn close to 13.2 to 13.5 throughout, even past 6K rpm where you appear to go rich.

What to make of the difference in our numbers? I still have no idea.

They have your A/F perfect on your bike and lean on top where it needs to be, they started to lean out the 2013 and stopped probably because the could not get it over 7K with the limiter and did not use 3rd gear.
The 2013 is leaner around the 2-4K range stock. The 2014 seems to have a good A/F ratio out of the box and yours improves on that. This is all in the 100% throttle range.

Greg, was the tuner using a PCV to tweak your A/F mixture for those runs?
or was that just a measurement of HP and A/F with your different hardware setups?
and looking at the combined chart there is no HP gain up to 6800 RPM where the stock run was done in 4th gear and hit the limiter.
I think the Dyno run I had on mine with Don for the ECU shows about 3 or 4 HP gain, still less than I was hoping.
This was just ECU tweak, no hardware changes between runs.

(01-13-2015, 05:34 AM)HikerToo_imp Wrote: [ -> ]Greg, was the tuner using a PCV to tweak your A/F mixture for those runs?
or was that just a measurement of HP and A/F with your different hardware setups?
and looking at the combined chart there is no HP gain up to 6800 RPM where the stock run was done in 4th gear and hit the limiter.
I think the Dyno run I had on mine with Don for the ECU shows about 3 or 4 HP gain, still less than I was hoping.
This was just ECU tweak, no hardware changes between runs.

There was no adjustment of tuning and I don't have a fueling piggyback. I wanted to see how the stock ECU would respond to different exhaust, intake, and 02 sensor setups.

What doesn't show in the graphs is the feelings I get from the new setup. I enjoy the bike much more because of the way it looks, sounds, and feels through the seat and bars. Cracking the throttle wide open on a dyno and graphing a few variables is too simplistic to capture the subtleties that affect rideability. But I'm glad I spent the time and energy to do the dyno runs. The more I understand how this fabulous machine works, the richer the riding experience for me.

My bike now sounds more like a serious machine (to me), it runs cooler, I feel less vibration, and it seems happier to cruise at higher RPMs.

I've never cared for the smell of catalyzed exhaust. I relish the associations of that real exhaust smell - from fiddling with carburetors as a child, riding in friends' 1960s muscle cars, to tweaking the marvelously accessible throttle linkages in my 911T as a twenty something.

It's a sensual smorgasbord and I'm indulging!

(01-09-2015, 01:18 PM)The ferret_imp Wrote: [ -> ]

(01-09-2015, 12:53 PM)kevbroce_imp Wrote: [ -> ]

(01-09-2015, 12:06 PM)The ferret_imp Wrote: [ -> ]Ok I have to ask, how does one wear a hole in an RLET? You never touch it and it doesn't touch anything.

My bike and I are close. Very, very close...

My bike and I are close. Very, very close...
Lol, ok let's leave it at that.
I do have a question MG. If at this point, you had your bike reflashed. Would it then have to be re calibrated af wise, for the extra rpms it would be turning above and beyond what they have already adjusted for?

My bike and I are close. Very, very close...
Lol, ok let's leave it at that.
I'm sure it just peeled apart from going way too fast.

[url=http://s1375.photobucket.com/user/Kevin_Broce/media/rlet_zps093d834d.jpg.html]

(01-13-2015, 03:47 PM)Greg_imp Wrote: [ -> ]

(01-13-2015, 05:34 AM)HikerToo_imp Wrote: [ -> ]Greg, was the tuner using a PCV to tweak your A/F mixture for those runs?
or was that just a measurement of HP and A/F with your different hardware setups?
and looking at the combined chart there is no HP gain up to 6800 RPM where the stock run was done in 4th gear and hit the limiter.
I think the Dyno run I had on mine with Don for the ECU shows about 3 or 4 HP gain, still less than I was hoping.
This was just ECU tweak, no hardware changes between runs.

There was no adjustment of tuning and I don't have a fueling piggyback. I wanted to see how the stock ECU would respond to different exhaust, intake, and 02 sensor setups.

What doesn't show in the graphs is the feelings I get from the new setup. I enjoy the bike much more because of the way it looks, sounds, and feels through the seat and bars. Cracking the throttle wide open on a dyno and graphing a few variables is too simplistic to capture the subtleties that affect rideability. But I'm glad I spent the time and energy to do the dyno runs. The more I understand how this fabulous machine works, the richer the riding experience for me.

My bike now sounds more like a serious machine (to me), it runs cooler, I feel less vibration, and it seems happier to cruise at higher RPMs.

I've never cared for the smell of catalyzed exhaust. I relish the associations of that real exhaust smell - from fiddling with carburetors as a child, riding in friends' 1960s muscle cars, to tweaking the marvelously accessible throttle linkages in my 911T as a twenty something.

It's a sensual smorgasbord and I'm indulging!

There was no adjustment of tuning and I don't have a fueling piggyback. I wanted to see how the stock ECU would respond to different exhaust, intake, and 02 sensor setups.

What doesn't show in the graphs is the feelings I get from the new setup. I enjoy the bike much more because of the way it looks, sounds, and feels through the seat and bars. Cracking the throttle wide open on a dyno and graphing a few variables is too simplistic to capture the subtleties that affect rideability. But I'm glad I spent the time and energy to do the dyno runs. The more I understand how this fabulous machine works, the richer the riding experience for me.

My bike now sounds more like a serious machine (to me), it runs cooler, I feel less vibration, and it seems happier to cruise at higher RPMs.

I've never cared for the smell of catalyzed exhaust. I relish the associations of that real exhaust smell - from fiddling with carburetors as a child, riding in friends' 1960s muscle cars, to tweaking the marvelously accessible throttle linkages in my 911T as a twenty something.

It's a sensual smorgasbord and I'm indulging!
+1 on the sound and smell

I never had mine dyno'd stock so have no comparison, but i did time some real world runs which shows the bike is faster modified by a noticeable difference. Thanks for the graphs couldn't find them.

(01-10-2015, 09:43 AM)EmptySea_imp Wrote: [ -> ] and now I'm heading off to a planning meeting (aka party) to discuss our summer bike trip to the Ozarks. I think I'm going to break the news about the clutch to my wife at the meeting--she won't yell at me as much in front of other people.

I broke the news...but it was GOOD news. Turns out I don't need a clutch! I can barely contain my joy and relief. Took the bike out today for a quick run since it's warmish out. Figured out that it was the hand mitts that was causing my problems. As I mentioned in another post, they were designed for a scooter and were a bit tight. It looks like they were just tight enough that, if I moved my left arm just a little, the mitt would put ever so slight pressure on the clutch lever...just enough to slip the clutch just a bit. Took the mitts off and clutch proble went away. Told Cheryl that I just saved us $400 and that now I can use that savings for a new leather jacket. She failed to see the logic in this idea.

ES, I look forward to learning what your lady wife considers it would be better to apply the savings to.