No problem. I can sleep walk through an industrial setting but bikes
and other small engine scare the hell outa me. But when it comes
right down to it a bike is just a very small mill. It's got bearings,
chains, and seals just like the mill. However the real world
functions of a side draft carb confuzzle me. I get the theory it's
the same as the big holly's I'm used to, just with sliding venturi's
and other stuff a carb shouldn't have. The first carb I took apart
myself was an 1150 Dominator. Venturi's the size of coffee cups, and
about 12 pieces total ;o)
I approach the bike the same way I do things at work that I've never
seen before. If it was made by man it can be fixed by man. Go slow,
take your time, take pics or notes, if something is stuck STOP! ask
and investigate. once you know it's supposed to move and why it's
not... get a bigger hammer ;o)
You can never have too much cleaner or rags. Small containers should
never be tossed out, in a bag and out to the shop. Zip locks and
sharpies are your friends. And last NEVER NEVER NEVER toss out the
used container you cleaned everything in until you A) have finnished
the project. B) check all the crud in the bottom for small parts. Not
a hypothetical lesson unfortunately. Nor one I can say I only had to
learn once.
Those shims might have been something the PO did right. I'll let the
rest of the list chime in there but I have the "washer mod" on my
todo list for next fall. (I want to ride it more so I can see how
much difference it actually makes on the 450).
At 03:21 PM 2/21/2012, you wrote:
Hi Pat.
Somehow the ascii drawing got distorted, but you got the picture!
Thanks for sharing your knowledge with the group. Now I feel better
about installing these gaskets. I guess the POs were reinstalling torn
gaskets and used sealant to prevent leaks from the tear and old
rubber...
I'll be tackling the needle jet next because I think someone put some
shims in there and the bike seems to run rich.
Thanks again.
Richie
On Feb 21, 12:24 pm, Pat Patterson <[email protected]> wrote:
> Nice askii sketch btw. That's called a double lip o-ring. In the
> hydraulics world it's the best but can be fussy to get to lay in the
> grove properly. You MUST make sure it doesn't get rolled or twisted
> on install. Don't use any sealant But a light smear of oil (110% no
> dust or grit) can sometimes help it seal for startup. On fussy
> sunstrand pumps I've used a very light smear of white lith grease but
> carbs don't work at 2500psi so you should be ok.
>
> At 08:02 AM 2/21/2012, you wrote:
>
>
>
> >Hi Bob,
>
> >Just to clarify, this is what a cross-section of my gasket looks like.
> >The upper part is more 'rounded' of course and fit the carb's groove
> >perfectly while the bottom part has a groove inside that runs around
> >the entire gasket's shape.
> >Richie
>
> >Bowl Side
> > ________
> >/ \
> >| ______ |
> >|_| |_|
>
> >Body Side
>
> >On Feb 20, 6:26 pm, [email protected] wrote:
> > > I just looked at a spare carb and was reminded that the
gasket is a molded
> > > o-ring that matches the shape of the groove in the bowl. The
o-ring looked
> > > to be round(cross section).
>
> > > On Mon, Feb 20, 2012 at 1:23 PM, 85_NH650 <[email protected]> wrote:
> > > > Hi Guys,
>
> > > > I finally decided to take the plunge and clean my carbs
myself. I have
> > > > an 85 NH 650 that had terrible recurring issues with hesitation/
> > > > choking/stalling at low speeds while performing fine at higher speed.
> > > > I had the jets cleaned a couple of times but the problems came back
> > > > within days. This started around the time ethanol was introduced.
>
> > > > I'm still in the process of cleaning the carbs, but I'd like to know:
> > > > 1). which side of the gasket faces the float bowl (bottom part of
> > > > carb): the rounded side or the 'grooved/flat side?
> > > > 2). Do I need to use any kind of sealer/compound or RTV (?)
type stuff
> > > > on the gaskets before installing? Or anything else to 'treat' the
> > > > gaskets before installation?
>
> > > > It looks like whoever worked on the carbs before used some type of
> > > > gasket sealing stuff and I had to soak/clean up a mess of old and
> > > > newer material that had deteriorated and clumped into the
carbs and is
> > > > probably effecting the low jets. We shall see.
>
> > > > I'd appreciate any help/advice you can give me as this is the first
> > > > time I tackle this task to cut down on the cost of having
someone else
> > > > do it for me.
>
> > > > Thanks,
>
> > > > Richie
>
> Pat Patterson
> Abbotsford, BC, Canada
> VA7PDP
>
> 2001 PT Cruiser
> 83 450 Honda Nighthawk
> 78 F350 460/C6 on propane
> 71 Bronco 302/C4/D20 D44/9" {o===o}
>
> "Just add Lightness-"
> Colin Chapman. (1928 - 1982)
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Pat Patterson
Abbotsford, BC, Canada
VA7PDP
2001 PT Cruiser
83 450 Honda Nighthawk
78 F350 460/C6 on propane
71 Bronco 302/C4/D20 D44/9" {o===o}
"Just add Lightness-"
Colin Chapman. (1928 - 1982)
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