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Display Mesage #99801


Carb Vacuum Pistons
Written by ohpossum on 1/6/2011 at 05:49 pm


> On Sat, Jan 1, 2011 at 5:22 AM, Dan G <dndgentili@...> wrote:
>
> >
> >
> > No, sorry Phil, those rubbers are NOT supposed to have slits in them. But
> > at about $90 per carb X 2, it might be worth shipping them back and cutting
> > your losses.
> > Sorry. It's real disappointing that these seem to fail so often. I don't
> > think I ever had this problem on other bikes, but I've worked on several PCs
> > and they almost all needed replaced.
> > On another note, I was working on a fellow's 1200 Goldwing and he didn't
> > want to spend the money so we used rubber cement on them and they seem to
> > work fine for the couple of years he owned the bike. Another case of, "Ya
> > pays yer money and takes yer chances", I guess.
> > VA Dan
> > '95 PC "Darkness"
> >

If I recall correctly, don't laugh, it does happen infrequently, some listers on
the Yam*h* XJ Owners Group had used some type of "modeler's latex" to repair
punctures in the flexible piston boots, with fairly good results.

Years ago, I found some vinyl repair glue that I used on some upholstery that is
still flexible to this day, although somewhat discolored. I can't vouch as to
whether it would be impervious to fuels, but would also be worth consideration.

I also have some "tacky glue" from Wally World's craft department that is
flexible when cured. Comes in a semi-clear squirt bottle. On larger tears, a
small section of nylon pantyhose may provide reinforcement.

Ron

Message Thread for message #99801

pgboyd
1/1/2011, 02:40 am
Carb Vacuum Pistons
Okay, I should probably know this because I have already taken apart and rebuilt two sets of PC800 carbs already, but are there supposed to be small slits in the vacuum piston rubbers? I don't recall seeing them in any of the previous sets, b

    dndgentili
    1/1/2011, 01:22 pm
    Carb Vacuum Pistons
    No, sorry Phil, those rubbers are NOT supposed to have slits in them. But at about $90 per carb X 2, it might be worth shipping them back and cutting your losses. Sorry. It's real disappointing that these seem to fail so often. I don't think

      pgboyd
      1/1/2011, 03:02 pm
      Carb Vacuum Pistons
      Dan - that's what I thought, but I was surprised to find both of them had the same type of failure in them. I've heard of people using Gorilla Glue to fix them too, but I don't know that I would go that route. These were a spare pair that

      akienm
      1/5/2011, 07:29 pm
      Carb Vacuum Pistons
      OK, this reminds me of a story, this is unrelated to the PC800, or even motorcycles, but does involve a carb... And an inspired bit of McGyverism. My first car was a Chevy Vega, I bought it from my folks. After I'd had it for about 2 years, t

        ohpossum
        1/6/2011, 05:49 pm
        Carb Vacuum Pistons
        > On Sat, Jan 1, 2011 at 5:22 AM, Dan G <dndgentili@...> wrote: > > > > > > > No, sorry Phil, those rubbers are NOT supposed to have slits in them. But > > at about $90 per carb X 2, it might be w

    spacetiger_j...
    1/1/2011, 05:13 pm
    Carb Vacuum Pistons
    Phil, I think thats normal. They mate up with the housing to keep them from twisting. BTW, I am picking up a few other items and may have the naked PC (Mr Hyde) running soon. As part of the exhaust build, I'm mounting up some oxyg

    wes.steinbrecker
    11/10/2015, 09:18 pm
    Re: Carb Vacuum Pistons
    have used liquid electric tape.....don't have a time period to pass on