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MarkT Exhaust
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Author Topic: So I've started removing my carburators  (Read 1104 times)
shadowmagic
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« on: August 23, 2020, 08:36:59 AM »

Tank is off, just pulled the air box off and noticed the six large tubes coming out have some sort of sealant around them that is no longer really working. I'm wondering if I should seal them with jb weld? should I order an air box? Any advice greatly appreciated. I've put up some pics.



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Bighead
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Madison Alabama


« Reply #1 on: August 23, 2020, 08:54:22 AM »

I dont think you should order a new one. Seal them from the inside. Also do t think I would use jb weld the sealant needs to be flexible.
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1997 Bumble Bee
1999 Interstate (sold)
2016 Wing
Madmike
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Campbell River BC, Canada


« Reply #2 on: August 23, 2020, 09:05:15 AM »

My 97 is dry there.  

There are some locating tabs on the outboard sides of the tubes that line up between mating slots in the airbox when the tubes are properly aligned.  

The tubes will flex when you position the airbox.  I don't think that JB Weld would last there if you decided you need a sealant something that remains flexible (perhaps silicone) would likely be better.  

If you suspect air leakage there you could check it with ether once you have it back running and deal with it then.

You may be able to cobble up some way of sealing the carb ends of the tubes off and then half submerge the box in a sink full of water to see if the joints are leaking if you need something to do.
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shadowmagic
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« Reply #3 on: August 23, 2020, 09:16:20 AM »

Ok, good idea. Thanks for the tips, I'll check the auto parts store for a flexible sealant. I'm so used to using jb weld on everything lol
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Ricky-D
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South Carolina midlands


« Reply #4 on: August 23, 2020, 09:32:24 AM »

I would not try to seal the tubes to the box simply because the present situation looks the way it is.

Everything has been fine for all the years it has been the way that it is, and there's been no trouble
so why go and think that the change is needed.

I think the tubes have been settled in over all the years and now gluing them solid could cause a problem that heretofore was nonexistent.

Even if there would be a leak from a small gap, there would be no unanticipated consequences of a serious nature.

As long as the box is installed properly with the hoses correctly aligned I would not expect there could be any kind of problem whatsoever.
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2000_Valkyrie_Interstate
John Schmidt
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a/k/a Stuffy. '99 I/S Valk Roadsmith Trike

De Pere, WI (Green Bay)


« Reply #5 on: August 23, 2020, 11:12:32 AM »

Agree with Ricky, I've never bothered with resealing those tubes on my Valk and it runs fine....now 22 yrs. old. Just align as suggested and be certain they are all attached to the top of the carbs properly.
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shadowmagic
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« Reply #6 on: August 23, 2020, 12:16:28 PM »

So it looks like they cut down the wind screen that goes in front of the carburators right behind the radiator. Its about half the size now or so. They shaved off both sides. Any idea why someone would do that? Make it easier to put back in? maybe trying to cool the motor more? just curious.,,,,,
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Bighead
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Madison Alabama


« Reply #7 on: August 23, 2020, 12:19:30 PM »

To make it easier to put back would be my guess.
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1997 Bumble Bee
1999 Interstate (sold)
2016 Wing
shadowmagic
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« Reply #8 on: August 23, 2020, 02:37:57 PM »

This may be a dumb question but as I'm taking apart the carbs I realized the fuel line that runs from the tank and the splits into both sides of the carburators, one side is noticably longer than the other. I'm no expert but I would they should be the same length? Cmon, help a noob out please lol
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Madmike
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Campbell River BC, Canada


« Reply #9 on: August 23, 2020, 04:01:21 PM »

This may be a dumb question but as I'm taking apart the carbs I realized the fuel line that runs from the tank and the splits into both sides of the carburators, one side is noticably longer than the other. I'm no expert but I would they should be the same length? Cmon, help a noob out please lol
Short answer is "no" - qualified with - no kinks or loops, somewhat along the lines of OEM system.  Line length has negligible effect on flow to carbs max is likely under 24".

Stock setup is a tee in the middle with a single line feeding it from below the petcock, the line fills and the carbs feed as needed through the float valves. 
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98valk
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South Jersey


« Reply #10 on: August 24, 2020, 05:35:31 AM »

This may be a dumb question but as I'm taking apart the carbs I realized the fuel line that runs from the tank and the splits into both sides of the carburators, one side is noticably longer than the other. I'm no expert but I would they should be the same length? Cmon, help a noob out please lol


that is OEM.  For stock power levels it is fine.
I changed mine by installing a fuel block, since I modified the heads, intake, cams, and exhaust.
Now it is equal and provided a very small increase in available fuel volume which helps the front two carbs.

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shadowmagic
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« Reply #11 on: August 24, 2020, 08:13:18 AM »

Very nice!!
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The emperor has no clothes
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« Reply #12 on: August 24, 2020, 08:20:54 AM »

This may be a dumb question but as I'm taking apart the carbs I realized the fuel line that runs from the tank and the splits into both sides of the carburators, one side is noticably longer than the other. I'm no expert but I would they should be the same length? Cmon, help a noob out please lol
They are not equal. I suspect it's because of the smog valve up there. If you or the p.o. has done a desmog they can be more equal. I don't think it matters much though. You just don't want to have any excess fuel line anywhere.
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shadowmagic
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« Reply #13 on: August 24, 2020, 08:40:59 AM »

Yes, its been given a full desmog by the previous owner. Maybe I'll even them out since I'll be in there anyway  cooldude Thank you for the info.
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