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GT
PostPosted: Fri Nov 03, 2006 12:44 pm 
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Just busy rebuilding a set of Twin HS2's.

I have always wondered, but never asked.......what is this for?

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Namibian CAMEL
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PostPosted: Fri Nov 03, 2006 12:45 pm 
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Cigar holder?

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GT
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PostPosted: Fri Nov 03, 2006 12:51 pm 
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It could be an ancient form of torture. Stick your finger in and never get it out again! :lol:
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pristic
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PostPosted: Fri Nov 03, 2006 12:54 pm 
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Doesnt the hose go through there? Its on the heatshield right?

Peter.

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Wombat
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PostPosted: Fri Nov 03, 2006 1:04 pm 
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Not on mine - If small enough is it the choke cable holder?

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GT
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PostPosted: Fri Nov 03, 2006 1:10 pm 
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pristic wrote:
Doesnt the hose go through there? Its on the heatshield right?

Peter.


I thought that, but I have never seen a fuel hose going through there on others twin HS2's. It's about the right diameter. Is it supposed to be bent up like that?

Yes it's on the heatshield.
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pristic
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PostPosted: Fri Nov 03, 2006 1:22 pm 
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It does look a little bent :)

And yes, most dont have lines running through it even if its there :) maybe theres a few more HP by going around it :D

Peter

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Namibian CAMEL
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PostPosted: Fri Nov 03, 2006 1:31 pm 
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I don't have it on mine either.

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simon k
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PostPosted: Fri Nov 03, 2006 2:33 pm 
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it's for what I think is a small vacuum reservoir used by the vacuum advance dizzys, but not fitted to S's and GT's. You see them sometimes, a little round thingy in-line with the vacuum line

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drmini in aust
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PostPosted: Fri Nov 03, 2006 4:22 pm 
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They were only used on early cars, 850 Cooper & Deluxe, on the vac line to the dizzy. I never did rip one apart to see what it is..... :lol:

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graham in aus
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PostPosted: Fri Nov 03, 2006 4:53 pm 
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As far as I know Kev, they are just an empty bulb, I think the idea is to act as a bit of a reservoir of vacuum as you are on and of the throttle, thus dampening any positive and negative pulses of vacuum / atmospheric pressure.

Did that any make sense??? :lol:

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drmini in aust
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PostPosted: Fri Nov 03, 2006 4:55 pm 
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were they only used on twins? I think it was on my 850 with 1 carb as well.

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graham in aus
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PostPosted: Fri Nov 03, 2006 5:05 pm 
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Yea, single on 850's was probably the most common, just off to shed, I think I have one knocking around, distributors often had screw thread on vacuum diagphagm to match metal pipe / nut with taper thingo!

997 and 998 were the twins, as S's didn't hav vac adv!! :P

Graham 8)

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simon k
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PostPosted: Fri Nov 03, 2006 5:07 pm 
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drmini in aust wrote:
were they only used on twins? I think it was on my 850 with 1 carb as well.


I think I've seen them on minors with 1 carb....

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graham in aus
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PostPosted: Fri Nov 03, 2006 6:03 pm 
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Heres a pic of the bulb thingo on one of our 850's:
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It connects to the dizzy via the metal pipe
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Here's the connection on a 997 cooper dizzy! :P
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Cheers

Graham 8)

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