About to give up... still bogs in off idle

[gkmaia]

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[sgtslag]

On the CB750 Custom forum, they will shout you down for asking about Pods (they are not the most friendly crowd)...  There are plenty of posts already on their forum advising folks to abandon Pods on any CV version of the CB750's, as they won't work properly.  Props for trying, though.


I'd suggest going back to the OEM air box, unless you want to replace the CV carbs with non-CV carbs.  You are travelling a road which has seen many riders before you -- nearly all of them turned back:  too much money spent on too many jets, and good performance was just not achievable.  Cheers!

[TOOLS1]

Ditto what Sarg said. I get a kick out of the guys that come on raving about how they made pods work, then they come back with "I still have this one problem."
TOOLS

[LukeM]

The DOHC carbs are a CV design.  CV means Constant Vacuum.  As part of the design, the carbs need a certain amount of vacuum/low pressure on the intake side to work correctly. The stock airbox was specifically designed to supply this.  Removing the airbox disturbs the carbs enough to cause the off idle condition you mention, and some other stuff I'm sure you've experienced.  I've read a few stories of using a lower restriction air filter inside the stock airbox causing this, but that may be a corner case for that particular bike.

Me personally, I've been a form-follows-function kind of guy.  In most instances, I couldn't care less how something looks, as long as it operates correctly. I can always make it look pretty later, but it's GOT TO WORK FIRST.  That's just me and my big ole opinion.

Luke M

[Re-run]

The off idle bog is caused by not having the constant vacuum as Luke said. See, at idle, there is very little vacuum from the pods, when throttling up, the bike has to create a vacuum before things kick in and this is the bog you have. What rpm will the bike idle at? If it is kinda low, say 1000 or even a bit lower, bring it to 1200 and see what happens. Kinda of a bandaid though.

[sgtslag]

I successfully installed a K&N air filter in my (CV-equipped) '79 CB750K, without issue.  According to my laser-tuned, butt-dyno, it made a huge (barely noticeable) improvement...  Well, it felt like it ran better.  "Hey!  Hand me some more of those placebo/sugar-pills, will 'ya?"  At least I didn't have to worry about changing out the air filter for a very long time.  Cheers!

[Re-run]

I haven't seen people have issues as long as the airbox was used. But I haven't seen every bike made!

[gkmaia]

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