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Carburetor Heat Shields

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motorradfanatiker
Posts: 11
Joined: Fri Apr 01, 2011 3:19 pm

Carburetor Heat Shields

Post by motorradfanatiker »

Browsing on eBay I saw some aluminum heat shields for the /2 carburetors. I presume these are to help prevent flooding. I’ve never heard of them before, do they work? Anyone know anything about them?

Jerry
Jerry Hale
San Ramon, CA
R69S, R90S

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Micha
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Re: Carburetor Heat Shields

Post by Micha »

Hi Jerry,
Do you mean those insulators, between the intake on the head and the carb itself?
If so, those spacers are to insulate a bit the heat that passes from the hot engine head to the carb itself, a heat that can cause the fuel in the mixture to evaporate/"boil".
I remember buying a set over at Mark Huggett, made of some kind of Bakelite and you need another set of gaskets (made them myself).
Very helpful in hot days.
Michael Steinmann
R51/3 1952
Engine Nr. 529466

Andrew
Posts: 59
Joined: Wed Feb 24, 2021 5:38 pm
Location: England

Re: Carburetor Heat Shields

Post by Andrew »

Hi Jerry , yes I know what you are referring to they are made from either aluminium or stainless steel , used to help prevent fuel evaporation from the float bowl in got weather . I live in the UK so not really needed here we don't that that much heat!!!

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schrader7032
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Re: Carburetor Heat Shields

Post by schrader7032 »

I've heard/seen exhaust shields but not carb shields. Does anyone have a picture? What is the ebay item for sale?
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.

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motorradfanatiker
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Re: Carburetor Heat Shields

Post by motorradfanatiker »

Here is a picture from eBay.
FC9FDE06-7114-491B-BB4A-B2BC2DFE30E4.jpeg
Jerry Hale
San Ramon, CA
R69S, R90S

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schrader7032
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Re: Carburetor Heat Shields

Post by schrader7032 »

Thanks. Looks like a homemade solution. Hmmm...doesn't aluminum conduct heat too?
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.

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Micha
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Re: Carburetor Heat Shields

Post by Micha »

Nice idea!
BTW, one would need longer bolts, I think.
Michael Steinmann
R51/3 1952
Engine Nr. 529466

weh8127
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Re: Carburetor Heat Shields

Post by weh8127 »

I'm curious. Is carb over heating really an issue? 95F (35C) and humid feels the same in Massachusetts as it does in Florida. I've navigated urban traffic on my R60/2 in that weather with no problems.
Bill Husted
Barre, MA USA
1963 R60/2 w/ 1955 Steib S500
1973 R75/5

kwalther
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Re: Carburetor Heat Shields

Post by kwalther »

Would they not work better on the outside part of the carb? Not between carb and cylinder, or maybe sticking up in the wind.

1967 R502
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Re: Carburetor Heat Shields

Post by 1967 R502 »

These are made by Subcar in Taiwan. If I lived in a hot tropical climate, I might consider them too.

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