Author Topic: Leaky Carb Boots  (Read 2070 times)

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Offline greenconnie

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Leaky Carb Boots
« on: July 10, 2014, 01:53:05 pm »
Good Morning Everyone
So my new concours has been running rough after a spirited ride (7000 rpm rev a few times) and I discovered the issue is the carb boot between the cylinder 4 and the air box doesn't fit quite tight on the carb side.  If I cover the carb boot with duct tape to seal the whole, bike runs fine.. Sounds like I just need to replace the carb boot (the spring clamp is present)
Is there something else I should check while I remove the airbox to replace the boots? ( i have a newer set from my 1998 that died)  Perhaps there is some restriction in the airbox?  Bike runs good once I cover the leaky side of the boot.

Thanks
Kevin

Offline davida

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Re: Leaky Carb Boots
« Reply #1 on: July 10, 2014, 02:20:30 pm »
I'm wondering if you can reach into the airbox to install the new boot.  I bet its half a day or more to get an airbox out and in.
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Offline MotoCommuter

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Re: Leaky Carb Boots
« Reply #2 on: July 10, 2014, 02:30:21 pm »
There is a specific way the boots are installed. Look at the carb boot that fits into the air box. There should be a flat/straight section which should be aligned with a seam (between #3 & #4) on the air box. On the #4 it should be facing towards the #3.
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Offline greenconnie

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Re: Leaky Carb Boots
« Reply #3 on: July 10, 2014, 02:36:45 pm »
Rather than having to pull the ari box and replace the boot.. Is there a way to seal lip of the carb/boot ?
On the outside of the carb, you can see where the boot is not tight and that is where the air leak is..
I wish I had a picture handy..

Offline MotoCommuter

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Re: Leaky Carb Boots
« Reply #4 on: July 10, 2014, 03:11:09 pm »
I would not try to seal up the gap on the carb boot, they are made to fit correctly, something is not quite right with your carb installation, which is causing it to have a gap.

You don't have to remove the air box to remove the boot. Pop the springs off the boot/carb. Loosen the two bolts holding the air box in place, this will allow you to shift it back slightly.  This should allow you to make sure the boots are in place correctly and allow you to reset the airbox/boots back onto the carb. You may also have to remove or loosen the bands that hold the carb manifold boot to the carb.

FYI, there are specific boots for the #2 & #4 (Kawasaki PN 14073-1225) and #1 & #3 (Kawasaki PN 14073-1224) carbs.
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Offline Nosmo

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Re: Leaky Carb Boots
« Reply #5 on: July 11, 2014, 03:36:35 am »
I'm wondering if you can reach into the airbox to install the new boot.  I bet its half a day or more to get an airbox out and in.

YES.  That's how you do it.  Assuming you have normal human-sized hands, because if you are a giant than you'll have problems, there isn't much room in there.   Pull the air filter element, remove the carb boot retaining springs and clamps, reach into the airbox and pull the boot into the airbox and out.  You can aid the pull-through by pushing gently on the boot flange from the front with a wide-bladed screwdriver or such to help force the boot flange through the opening in the airbox.  Also, if they are old and stiff, try softening them with a heat gun or hairdryer.  Or if your are just going to scrap them, then cut the crap out of them with a razor knife and pull out the remains. 

Note that you CANNOT remove the airbox with the carb rack in place.  Well, not without a chainsaw, anyway.  The normal order of assembly is airbox, carbs, boots.
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Offline greenconnie

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Re: Leaky Carb Boots
« Reply #6 on: September 03, 2014, 03:36:12 pm »
I replace the carb boot with a softer one from my 1998.. and bike was happy for about 6 weeks.. Again last night, the silly boot has migrated again and now she runs like crap..  I'm thinking some sealing tape will be in order until I have time to move the entire carb assembly to bring carb 4 closer to the air box..
Any other thoughts?

Offline davida

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Re: Leaky Carb Boots
« Reply #7 on: September 03, 2014, 04:08:02 pm »
I'm cheap as heck (or so my wife tells me), but I sprung for new  intake ducts.  For 12 bucks each life became a little easier.

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Offline greenconnie

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Re: Leaky Carb Boots
« Reply #8 on: September 03, 2014, 04:20:33 pm »
Hi Davida
From where did you get them?  What sub part number?

Offline MAN OF BLUES

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Re: Leaky Carb Boots
« Reply #9 on: September 03, 2014, 04:24:31 pm »
I replace the carb boot with a softer one from my 1998.. and bike was happy for about 6 weeks.. Again last night, the silly boot has migrated again and now she runs like crap..  I'm thinking some sealing tape will be in order until I have time to move the entire carb assembly to bring carb 4 closer to the air box..
Any other thoughts?

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Offline smithr1

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Re: Leaky Carb Boots
« Reply #10 on: September 03, 2014, 05:21:04 pm »
Even though I spent good time making sure the boots were into the air box correctly once it was on the bike one of my boots did not mate well with the carb and was leaking.  It may have been the three times I put the carbs in and out but some how one boot was not in the air box correct and had to be to seal correct to the carb.  It sure looked correct but proof was in the correcting.
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Offline MAN OF BLUES

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Re: Leaky Carb Boots
« Reply #11 on: September 03, 2014, 05:30:17 pm »
Position is critical, also which boot sits where, as they differ... along with this comes the front boots, which also must be installed correctly, with the little square tab siting @ 12 o'clock, those have a slight offset angle iirc, and make a difference in the angle of attack.
I noticed this when I was doing a 36mm install, using Ninja carbs and front boots.

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Offline greenconnie

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Re: Leaky Carb Boots
« Reply #12 on: September 04, 2014, 02:24:17 am »
Hi There

So I have the Carb Boot in my hand (part 14073-1225) stamped on the boot for number 4.
So as I look at the boot.. how does it fit?  A 'little square tab' was mentioned, which i see embedded in the groove of the boot, or is it the small little nub on top of the boot where the seam comes together?  If I put the small little nub at the 12 oclock position, the orientation of the boot puts the part number facing you, which is how I had it installed. 
Seem right?
« Last Edit: September 04, 2014, 02:36:49 am by greenconnie »

Offline Bob_C_CT

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Re: Leaky Carb Boots
« Reply #13 on: September 04, 2014, 12:50:42 pm »
That little square tab in the groove of the boot has to go into the corresponding notch in the airbox. If I recall it is at the 6 o'clock position. Look at the airbox you will see the square notch.
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Offline Trapshooter2

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Re: Leaky Carb Boots
« Reply #14 on: September 16, 2014, 02:46:24 am »
Just had my carbs and airbox out of my '98 two weekends ago. Steve has a good video on YouTube showing how to remove and replace both. Not as big of a job as one would think.

Murph's Kits has replacement boots.

Good Luck...........
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Offline davida

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Re: Leaky Carb Boots
« Reply #15 on: September 16, 2014, 02:53:29 am »
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Offline SteveJ.

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Re: Leaky Carb Boots
« Reply #16 on: September 16, 2014, 03:15:05 am »
$56 shipped for the set from our friends at Murphskits.


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