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Author Topic: C10 Carburetor  (Read 258 times)

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Offline stev60

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C10 Carburetor
« on: February 28, 2016, 05:56:22 PM »
I have a 1948 model, with an incorrect carburetor fitted, I really need as much info as I get on the correct type, I believe it is a remote bowl type
Steve

Online ianinglis

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Re: C10 Carburetor
« Reply #1 on: February 28, 2016, 06:45:51 PM »
it should be a 74 or 274 remote bowl type with an internal diameter of 25/32"
they do come up on ebay every now and then but they can be expensive
try this link

https://www.google.co.uk/search?q=amal+274+carb&espv=2&biw=1120&bih=619&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjE3OjfjpvLAhUHHxoKHX8rCRQQ_AUICCgD&dpr=1.5

ian
BSA C10L 1956 - JFO 588
BSA C10L 1954 - MVE 107
RM6 RALEIGH RUNABOUT
ENFIELD DIESEL KUBOTA OC 95
BSA M21 RIGID RKN 816
CBF 1000
BSA ARIEL 3

Online hampshirebiker

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Re: C10 Carburetor
« Reply #2 on: February 28, 2016, 06:46:10 PM »
It will be an Amal 274 with probably a 25/32 inch bore. The later C10L had a Monobloc with a 90 main jet. Somebody else on here will probably fill in the gaps for you.
Postal - Liphook Hants - But just into West Sussex.

Online hampshirebiker

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Re: C10 Carburetor
« Reply #3 on: February 28, 2016, 06:46:34 PM »
Sodding pink box. for the umpteenth time get rid of it.
Postal - Liphook Hants - But just into West Sussex.

Offline stev60

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Re: C10 Carburetor
« Reply #4 on: February 28, 2016, 08:53:04 PM »
I suppose the next question is what is the best alternative, will the monobloc  work, the main jet size is the same

Online ianinglis

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Re: C10 Carburetor
« Reply #5 on: February 29, 2016, 08:59:13 AM »
yes the monoblock will work fine you may have to experiment with changing the jet sizes but any 20 mm carb will do the job - some folk fit a cheap chinese pit bike carb very cheap at around £20
you may have to mess around a bit to get the flange to fit and again try some different jets

here is a monoblock one that will fit

http://www.ebay.co.uk/itm/BSA-C10L-AMAL-MONOBLOCK-VINTAGE-MOTORCYCLE-CARB-/161971197414?hash=item25b63c55e6:g:mRUAAOSwG-1WtyMN


ian
BSA C10L 1956 - JFO 588
BSA C10L 1954 - MVE 107
RM6 RALEIGH RUNABOUT
ENFIELD DIESEL KUBOTA OC 95
BSA M21 RIGID RKN 816
CBF 1000
BSA ARIEL 3

Online ianinglis

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Re: C10 Carburetor
« Reply #6 on: February 29, 2016, 09:00:13 AM »
here is another one that will fit from the same seller

http://www.ebay.co.uk/itm/TRIUMPH-3TA-T21-VINTAGE-MOTORCYCLE-AMAL-MONOBLOCK-CARB-/401068522288?hash=item5d618bfb30:g:ARYAAOSw0HVWAtj6

check out this table for suitable carbs (any 4 stroke 25/32 will be suitable with the correct jets)

http://porklips.org/~mason/moto/amal_specs.html

here is a new one from HITCHCOCKS
http://www.hitchcocksmotorcycles.com/amal_carburettors/complete/monobloc


ian
« Last Edit: February 29, 2016, 09:12:21 AM by ianinglis »
BSA C10L 1956 - JFO 588
BSA C10L 1954 - MVE 107
RM6 RALEIGH RUNABOUT
ENFIELD DIESEL KUBOTA OC 95
BSA M21 RIGID RKN 816
CBF 1000
BSA ARIEL 3

Online timsdad

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Re: C10 Carburetor
« Reply #7 on: February 29, 2016, 10:11:29 AM »
All BSAs got updated to the new Monobloc carb in about 1955 so these are a direct replacement for the old pre-Monoblocs that were fitted before that. The Monobloc then got replaced by the Concentric in the late '60s so these were fitted to BSAs from about 1968.

In my opinion, the Monobloc is the best carburettor, so a well-worthwhile update from the earlier remote-float carb if the bike is going to be used.

The Concentrics are cheaper, easier to set up and much more forgiving but the 600 series, original fitment on the late 250 BSAs, but were not made in a small enough choke size to fit the pre-unit Cs. The 624 (24 mm choke size) is a bit big for a 250 C12 or C11 but will still work ok if it's all you've got. It's better to have a carb with a smaller size choke than the inlet tract so it steps up rather than down.

Ray
Just a motorcyclist.

Offline stev60

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Re: C10 Carburetor
« Reply #8 on: February 29, 2016, 06:41:03 PM »
Thanks for the input, really appreciated it is a concentric on it at the moment but choke size is 26mm, to big I think, ive managed to track down one thats a match for the inlet size
Steve

Online Owen

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Re: C10 Carburetor
« Reply #9 on: February 29, 2016, 07:21:35 PM »
Have a look at the attached carb list
1945 C10 & C11
1953 C10
1953 C11 x 2
Still looking for an Original 350 side valve C12