Fuel Injection Problem with a 2014 California model

[Red Mist_imp]

[url=attachment.php?aid=1317]Fuel Injection Sync 4-21-14.pptx (Size: 530.44 KB / Downloads: 38) Hello gentlemen. I will not respond to the people who questioned why I did not have my bike inspected on a dynamometer, or why I was relying on seat-of-the-pants riding impressions from skilled and experienced riders/mechanics. Nor will I reply to the comment about comparing the operating characteristics of a V4 versus an in-line 4. I will offer "proof" that my 2014 CB1100 does not run properly. Actually, the diagnosis was very simple, for anyone owning a $600.00 electronic vacuum gauge (as I would expect any qualified / authorized Honda dealer to have). As you can plainly see from the picture below, the fuel injectors on this bike are clearly not synchronized properly. Sorry if I "offended" any members of this forum by suggesting that there could possibly be some sort of manufacturing defect to our beloved CB1100.

I certainly am not offended. But you posted a concern and quite a number of us took a good deal of time and trouble trying to assist you. Your initial complaint involved SOTP impressions. You probably know by now that this is not a problem that anyone else has experienced; it's not a common problem, nor even an uncommon problem. It's a first.

Before running into 6 pages on a thread, it really would have been helpful to have had the vacuum gage information in the OP. It's clear that there's an issue with your particular bike and it looks like you're on track to get it resolved.

This forum's been around for about year now, and while there's some good information here -- as on any forum -- it's still just an Internet forum. Most members lurk, a few post, and a few of those have some pretty good background. I'd figure you were wanting those folks to respond.

We are a polite bunch. If you'd posted this to Gixxer.com, another forum of which I'm a member, without specifics, the moderators would have drummed your post out of town in an ignominious demise. And they would not have been the least bit polite. However, I know I can trust that forum to give me the best possible information.

We want to help, but we need specifics. It's the old credo, GIGO. Help us to help you.

I thought the flies on these were all on the same shaft and not adjustable. Could valves or an air leak or something else be causing the vacuum difference? I know you will keep us posted on how this is fixed.

I agree with Deanohh here. Fuel injected bikes use an entirely different protocol than our older carbureted motorcycles. The vacuum balancing at idle was handled by an individual adjustment screw for each carburetor. Float bowls, gravity feed, main and pilot jets, needles...none of that obtains with fuel injection.

All of this still begs the question (as the bike is new and under warranty): what is AHMC's analysis of the problem? If we attempt to fix a problem like this on a brand-new motorcycle, we run the risk of voiding the warranty.

I would like to see the gentleman's problem resolved as much as anyone, but a simple vacuum gage analysis won't accomplish that. These motorcycles -- as we have seen in the various threads dealing with speed limitations and ECU reflash/reprogramming options -- are complex and we need to begin our analyses with the machine's central computer, or ECU, and work our way out from there.

This is the biggest bugaboo I've seen on the CB1100 forum; it's a bike that attracts an older buyer who's generally not familiar with the technologies used in the latest machines.

OTOH, a forum like Gixxer.com, which is rife with younger riders, is pretty savvy when it comes to electronics.

Start with the black box and work your way out.