Need some help putting carbs back on.

Discussion in '1st & 2nd Generation 1983-1989' started by Turbocharged314159, Nov 23, 2009.

  1. Turbocharged314159

    Turbocharged314159 New Member

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    Hey, I can't seem to get the carbs back on the engine. As most can guess, it's those damn rubber intake boots.
    Anyone know any tricks to get them on?
    Thanks.
     


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  2. crustyrider

    crustyrider New Member

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    heat them up with a heat gun and make them "soft" again...or put a little bit of oil on the rim of them....make sure you have them on correctly..there are arrows on the boots to show you the "way"
     


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  3. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    In my opinion, oil isn't the best idea because oil and heat are what break down rubbers.

    hrm... that's how that happened...

    But I digress; The safest way is to boil the boots in water. A heat gun can work but the chances of damaging them are far greater. Use a lubricant that will evaporate without leaving a residue like the cleaner 409.

    Insert the carbs into the front cylinder 2/4 and then work them into the rear cylinders 1/3. I often have to use a small screwdriver (without sharp edges) to work the lip of the boots up over the carb.
     


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  4. TOE CUTTER

    TOE CUTTER Mullet Man

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  5. motorhead1977

    motorhead1977 New Member

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    Since you have them off, replace the boots. New ones allow for much easier installation and for the $40 it saves having to pull them again when one of the old ones develops a crack.
     


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  6. Turbocharged314159

    Turbocharged314159 New Member

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    Yeah, I just ordered new boots. The old ones are developing cracks and just too hard to work with.
    Thanks for the help!
     


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  7. squirrelman

    squirrelman Member

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    Lube helps alot....i use brake fluid cuz it's slippery and won't degrade rubber.

    slip the boots half-on/ half-off the cylinder heads, and angle them closest to aligning with the carbs.......then PUSH and pray.
     


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  8. NorcalBoy

    NorcalBoy Member

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    that's funny because that is exactly what honda tells you to use..the problem isn't the oil, it's the age of the material, the heat, and air pollution. Those rubbers are specifically designed to be in contact with petroleum products...i'm guessing that the gas vapors that flow through them is bad too???????
     


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  9. TOE CUTTER

    TOE CUTTER Mullet Man

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    +1
    The hardest part is trying to get said carb installer to replace the damn boots!A snap with new.:thumbsup:
     


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  10. Fazer1Sniper

    Fazer1Sniper New Member

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    had to do this on the 82 Magna more times than I wanna admit. Plumbers Silicone grease. On the expensive side but it conditions the rubber and makes them more flexible and slick as snot.
     


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  11. stewartj239

    stewartj239 Member

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    I spray the boots with WD-40. I sit on the bike, work the front carbs in first, then using the air cleaner base - press down on the rear carbs until they pop in. This seems to work well for me. I can get them in just a few minutes.
     


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  12. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    Suit yourself. I won't be using a petroleum based lubricants in direct contact with the rubber boots whenever I can help it. Petroleum and rubber by itself, fine. Petroleum, rubber (25yr old rubber), and 230ish degree heat - no thanks.

    FYI - I've been told ethanol products are perfectly safe for all the seals and rubbers in 25yr old fuel systems as well. :thumbsup:
     
    Last edited: Nov 24, 2009


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  13. Fazer1Sniper

    Fazer1Sniper New Member

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    All the v-4's are a bitch to place the carbs back on. The first time I took them odd the 82 V45 i sent 16 springs flying accross the shop!
     


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  14. NorcalBoy

    NorcalBoy Member

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    Tink, I am in no way busting your chops....all I ask is that you try to mount a 25 year old tire on a rim and then try to mount a 6month old tire, on the same rim. A small amount of oil will not harm the carb boots....most crankcase breathers that I see are vented into the airbox.....Honda even instructs the use of oil in it's manuals, hell, you can use KY for all I care.
     


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  15. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    I know - no harm no foul. I have a personal belief based on my own reading that rubber compounds are not impervious to deterioration caused by petroleum products. This deterioration is significantly increased when coupled with extream heat, even those designed for exposure to petroleum. Crankcase vent tubes that you mention are not the same thing (heat exposure) as rubber in direct contact with the cylinder head.

    I'm happy to provide sources if it matters. Maybe it doesn't affect things enough to be concerned about.... But keeping oil away from the boots makes me feel better and is my preference especially considering there are other lubricants that can be used.
     


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  16. NorcalBoy

    NorcalBoy Member

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    you make a great point, if it makes you feel a little better, then rock on, my friend!
     


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  17. crustyrider

    crustyrider New Member

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    KY jelly...its not just for parties anymore..... I got the oil thing straight from my manual...that being said...... use whatever you fell "lubes the best...I personally , if I had the money , would have gone with new boots..... but I had two sets I boiled one set and put a light coat of oil on it and the carbs slipped right on.....

    Oh on another note... Too the OP don't bang on the carbs as you are trying to get them to go on pushing and a small amount of prying is all they need... mallet + carbs= broken carbs....This I know from experience....
     


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