CV slide lubrication

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Norbert R
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CV slide lubrication

#1

Post by Norbert R »

hi all,

Rebuilding my carbs with Randakk kit - have the CV slides really clean and smooth, great action, but a little dry because they are now so clean.
Question: can I lube the CV slide shaft, and with what ?
Thanks in advance !
Nulla futuit datum...
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CYBORG
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Re: CV slide lubrication

#2

Post by CYBORG »

i don't lube them, cause the lube can draw dirt and make them stick. install the spring in the cap and the piston on the top of it. the piston should go done easy, and come back up on its own. if so, good to go
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ericheath
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Re: CV slide lubrication

#3

Post by ericheath »

Most of the veterans here adhere to no lube, but one person a few years back claimed the portion in the cap was a permeable material (brass?) and soaked them overnight in a light oil, then wiped as clean as possible before reassembly. I am not sure if that was good info or not.
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backyardbob
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Re: CV slide lubrication

#4

Post by backyardbob »

the permeable material is known as oilite. consists of zillions of tiny brass balls pressed together and the spaces in between the balls filled with oil. also commonly used for small electric motor bearings and such. If that is in fact what they used, after 25 years the oil is depleted.
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Missourimike
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Re: CV slide lubrication

#5

Post by Missourimike »

If the slides have "great action" without a lube, what's the point? Just something more to gum up the works. There are Teflon sprays, but don't know if that would be ideal either. I suppose by now you know we are not to swap out slides, as they are hand-fitted at the factory by little old elves. I have swapped out a couple that had their skirts blown off by backfiring, but made sure they were not binding and fit good.
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pistolpete
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Re: CV slide lubrication

#6

Post by pistolpete »

Norbert R,
Clean and dry is correct from my perspective.
I would however use Marine Grade Stabil in every tank if you feel that a little lube is necessary.
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Norbert R
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Re: CV slide lubrication

#7

Post by Norbert R »

Thank you one and all!
@ Missourimike - so backfiring blows the skirts off ! I had a slide brocken like that and couldnt think how on earth that could happen, real interesting fact. I have two 764A racks so just swapped out a cap and slide pair.
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Toehead
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Re: CV slide lubrication

#8

Post by Toehead »

I tend to run a little stabil and a little MMO in every tank to keep everything lubed. Since doing this, I haven't had a sticking slide yet.

YMMV
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Norbert R
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Re: CV slide lubrication

#9

Post by Norbert R »

Carbs and how they work are still a great mystery to me - how would the lubrication get from the fuel onto the inner tube/piston of the CV slide to lubricate them? I thought there's just air/vacuum in that area?
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Re: CV slide lubrication

#10

Post by rcmatt007 »

I think it is the MMO fairies the get it there
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pistolpete
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Re: CV slide lubrication

#11

Post by pistolpete »

It gets some moisture (stabil, fuel, MMO etc.) When the carbs are being choked.

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Norbert R
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Re: CV slide lubrication

#12

Post by Norbert R »

pistolpete wrote:It gets some moisture (stabil, fuel, MMO etc.) When the carbs are being choked.

Pete
Uhh.......,so it's not the fairies ?
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Nulla futuit datum...
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CYBORG
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Re: CV slide lubrication

#13

Post by CYBORG »

thanks for the info Pete. I had wondered about that myself
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Hal
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Re: CV slide lubrication

#14

Post by Hal »

The Keihin Carb Fairies do work in mysterious ways, but they recommend Stabil and MMO in the fuel, just like Pistol Pete and Randakk do.
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can lure it back to cancel half a line...

so....probably best use Tipp-Ex in future?"

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ericheath
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Re: CV slide lubrication

#15

Post by ericheath »

When you think about it, the slide is hanging down in the throat getting some mixture on it. Then it's sucked upwards. It's tight, but plenty of room for some to be pulled into the lower chamber. The next time it's sucked up, it would pull some around the slide's outer diameter. From there it can get pulled onto the slide and the bore. I have one of my 77's that is addicted to MMO, if it doesn't get it, it complains a lot. That said, I think I remember Mike Nixon, saying the cleaner you keep them, the better.
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
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