- Joined
- Nov 20, 2004
- Messages
- 20,510

NKN said:But I do have the left-hand panel secured by a Dzus fastener... but in the top left of the panel.
Yes, as one would expect for a Mk2, but not a Mk2A.
2A
NKN said:But I do have the left-hand panel secured by a Dzus fastener... but in the top left of the panel.
NKN said:Carbs also have some mysteries for me. Numbers on the body looks different: R35 vs L36
NKN said:And the sliders are playing the same game: 3 vs 4
Perhaps it's the reason why only one header is blue?
L.A.B. said:Yes, as one would expect for a Mk2, but not a Mk2A.
L.A.B. said:NKN said:Carbs also have some mysteries for me. Numbers on the body looks different: R35 vs L36
932 R35 (right hand) and L36 (left hand) would be the correct carbs for a Mk2.
NKN said:And the sliders are playing the same game: 3 vs 4
Perhaps it's the reason why only one header is blue?
THE 'MB' numbers are just casting/foundry numbers and can be ignored.
Both slides are 3 1/2.
NKN said:Next time we'll meet, you would deserve a fresh beer :wink:
NKN said:One smart thing on those Amals is that the two jets are on the same axle, almost one behind the other. Or am I wrong?
NKN said:One smart thing on those Amals is that the two jets are on the same axle, almost one behind the other. Or am I wrong?
Never saw that before on any carb, Dell's, Bing's, Mikuni's, SU, Weber's...
NKN said:Carbs also have some mysteries for me. Numbers on the body looks different: R35 vs L36
L.A.B. said:NKN said:Next time we'll meet, you would deserve a fresh beer :wink:
Thanks, but I never touch the stuff these days.![]()
NKN said:One smart thing on those Amals is that the two jets are on the same axle, almost one behind the other. Or am I wrong?
Sorry, I don't understand what you mean by "two jets are on the same axle"?
Danno said:NKN said:One smart thing on those Amals is that the two jets are on the same axle, almost one behind the other. Or am I wrong?
Never saw that before on any carb, Dell's, Bing's, Mikuni's, SU, Weber's...
The angled screw is just a throttle stop/adjuster. The horizontal one controls the pilot circuit.
grandpaul said:NKN said:Carbs also have some mysteries for me. Numbers on the body looks different: R35 vs L36
Yours is only the second carb I've seen stamped with the "X"'ed out numbers, then re-stamped.
The 74 John Player / MkIIA that I'm restoring is similar...
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NKN said:L.A.B. said:NKN said:Next time we'll meet, you would deserve a fresh beer :wink:
Thanks, but I never touch the stuff these days.![]()
OK, what would you like instead?
NKN said:Well, it looks like it's really time for me to change my glasses :roll:
It's the main jet, and I don't know how you call it (where the blue arrow points) perhaps a diffuser?
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NKN said:Is there an idle jet on Amals'? Or is it "built in" somewhere?
Sorry, I don't understand what you mean by "two jets are on the same axle"?
AXIS - thats why theyre ' Concentrics ' ! :shock:
Hava look & see if the mufflers are straight thru ' glass pac ' , so it breathes freeley .
Matt Spencer said:Hava look & see if the mufflers are straight thru ' glass pac ' , so it breathes freeley .
cNwRestomod said:Curious to know what you paid for your Norton? And, my two cents worth. I noticed that one of the header pipes was either new (the chrome was intact with no colour) and the other header pipe was a dark blue. The dark blue header pipe could be the result of: too rich a mixture, the bike left at idle too long before riding, an exhaust leak, etc.
Anyway, good luck with your purchase. I think you'll find that you will need not only the Norton manual but the two Norton Parts List and Manual. Some Whitworth tools and some Norton specialty tools at some point.
Good luck!
Bryan
MFB said:Hi NKN
The main jet and needle jet are indeed on the same axis or, to use another word, "concentric".
The needle jet, in conjunction with the tapered needle in the throttle slide, provides a gradual increase in fuel to match the increased airflow as the throttle is opened.
Once the throttle opening goes beyond are certain point, the needle jet becomes fully open. This jet,when fully open, is much bigger than the main jet, so the fuel supply is then controlled by the main jet.
The pilot or idle jet is, as you suggest, " built in" on these carbs. It is located behind a blanking plug on the opposite side of the carb to the air adjustment screw.
I did a modification on mine, as suggested in "Bushman's carb tuning secrets", by drilling out the plug, tapping a thread in the hole, and blanking it off with a shortened air screw.
This provides better access to the pilot jet for checking and cleaning. Older Amals had removable pilot jets screwed into the bottom of the carb body.