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Old 05-14-2018, 02:30 PM   #1
Darrell41653
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Default Low end bog right off idle.

My bike has always had a stutter right off idle up to around 2500 RPM's.
From 2500 to redline it rips like a banshee, no hesitation or flat spots. Just that annoying off idle bog.
If I crack the throttle quickly it will bog and hesitate for just a second before revving out.
If I slowly roll it on there is a slight stutter but no bog.
The bike starts, idles, and runs fine. Just that annoying low end bog/stutter.

Everything is stock, exhaust, engine, etc.
10,100 miles.
Never had any work done to the bike except for new spark plugs at 9,000 miles to see if that would help the bog. It didn't.

I have always kept Sea Foam in the tank from new, as I have had issues with other small engines in the past. I also use an ethanol stabilizer in the tank, as this was recommended by the Honda shop.

I am somewhat mechanically inclined, but have never had any experience with carburetors, especially four in a row.

The local Honda shop says that it needs the jets cleaned along with synchronizing and tuning the carbs to the tune of an estimated $400.00.

Does this sound about right?

Have any of you experienced this type of low end bog?
As I said, mine has done this from the day I rolled it off the showroom floor.
I guess I just was so excited I paid it no mind at first, but it has started to irritate me.

I have asked around, and in my neck of the woods there are no motorcycle mechanics I have found, that I trust other than my local shop.
I have had dealings with them before, and they have always been fair.
Plus their top mechanic has 30+ years experience in the motorcycle/ATV field.

Any of you knuckleheads around Eastern, Ky. that can clean, sync, & adjust my carbs?

Other advice?
Smart ass remarks?
Anyone want to trade me sport bike to it? She's a beaut.

5 by Darrell Hacker, on Flickr
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Old 05-14-2018, 05:28 PM   #2
Joelittel
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Default Re: Low end bog right off idle.

I don’t have any real advice, just questions.

Could something be sticking?

Is that a recent picture of your bike? It looks showroom new.

Where did you get your seat cowl?

Can you post a profile shot? I’d like to see your belly pan.
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Old 05-14-2018, 05:30 PM   #3
Joelittel
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Default Re: Low end bog right off idle.

How is your air filter? No obstructions? All the boots properly seated on mouth of carbs?
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Old 05-14-2018, 06:05 PM   #4
Darrell41653
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Default Re: Low end bog right off idle.

Quote:
Originally Posted by Joelittel View Post
How is your air filter? No obstructions? All the boots properly seated on mouth of carbs?
Filter was replaced last late fall. It's brand new.
I sprayed starter fluid around the boots while it was running. No leaks.
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Old 05-14-2018, 06:07 PM   #5
Darrell41653
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Default Re: Low end bog right off idle.

Quote:
Originally Posted by Joelittel View Post
How is your air filter? No obstructions? All the boots properly seated on mouth of carbs?
Picture is about a year old, but she looks exactly the same.
I can't post a pic right now, but I will asap.
Seat cowl came from David Silver Spares on England.
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Old 05-15-2018, 03:41 AM   #6
vic2099
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Default Re: Low end bog right off idle.

Here's mine CB600 (year 2002, faired version, never sold in US).
Carbs cleaned, before syncing: https://www.youtube.com/watch?v=pdjLDOTcSx8
After syncing: https://www.youtube.com/watch?v=qUtQ_R6GCtA

You may notice low idle speed - around 1000RPM, should be 1400 and after adjusting - it works like a charm.

400 US&A dollars for cleaning and syncing? That is a robbery!
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Old 05-28-2018, 02:58 PM   #7
Darrell41653
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Default Re: Low end bog right off idle.

UPDATE:

Picked the bike up last Friday. Wow! What a difference.
Replaced the plugs, cleaned, synced, & adjusted the carbs.
She runs better than the day I rolled her off the showroom floor.
No hesitation, or sputtering, just a smooth roll on all the way from 1,400 RPM's to redline.

The problem was the damned ethanol they are putting in gas.
Crap turns to shit after sitting for a while.

I have a new gas station just a few miles from me that sells 100 octane pure gas on one pump. It is a little more expensive, but so is $420.00 for a carb clean.
I plan on using that whenever I am just around town. When I am out on the road I will have to use gas with ethanol, but I am keeping Sea Foam and liquid performance, an ethanol stabilizer.
I plan on keeping the pure gas along with Sea Foam and the ethanol stabilizer during the winter.

I have read about winterizing a bike. But since the '06's don't have a fuel petcock to shut the fuel off, I have no way of running the carbs dry except to drain the tank completely. Then you get in to rust issues.

What do you guys do for long term winter storage?
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Old 05-29-2018, 11:02 AM   #8
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Default Re: Low end bog right off idle.

Darrell, didn't see the pricing on this thread before asking on the other.

For winterizing, I believe you can use a fuel stabilizer and run until it's mixed w/ all the gas, then drain the carb bowls. You can disconnect the tank from the carbs, too, if you wanted to, gas won't spill it's vacuum operated.

I wonder if you can just disconnect the tank and run the carbs?
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Old 06-17-2018, 09:56 PM   #9
vic2099
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Default Re: Low end bog right off idle.

Try 95 instead, those engines were designed to run this fuel, 92 would be great.

100? That is less flamable than anything I know Less is better for our engines.

Ethanol? Number of octanes won't tell you how much ethanol it has.
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Old 09-10-2018, 01:18 PM   #10
Walkers
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Default Re: Low end bog right off idle.

Just started a new topic for a similar problem. My bike also had this same issue since I acquired it, but since storing the bogging has gotten much worse. Thanks for all the info!
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