BritBike Forum logo
BritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike Sponsor SteadfastCyclesBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorHepolite PistonsBritBike Sponsor
Upgrade to: Gold Membership | Premium Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
celtrock
celtrock
Vermont
Posts: 96
Joined: January 2015
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
a word from..
Manuals on DVD (Shipping included)
Previous Thread
Next Thread
Print Thread
Rate Thread
Monobloc 376 body numbers
#489453 05/09/13 12:42 pm
Joined: Aug 2012
Posts: 44
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Aug 2012
Posts: 44
Hi all,

I am building a slightly modified BSA B33 engine. The modifications mean that choosing a carb by the date the engine was made is a bit irrelevant. I am OK choosing jets etc but the I wonder if anyone knows me the basic difference between the following 376 bodies ? = 376/241, 376/85 and 376/10.

Maybe I should just buy the "generic" 376/1716 Standard 1 1/16" Monobloc confused

Ta for looking as "they" say


Current rides = 1959 650 Matchless G12CSR in near showroom nick, 1956 BSA B33 in "Goldy" trim (yeh, I know, cheesy but I like it !)
Support Your #1 BritBike Forum!

Check out British motorcycles for sale: British Motorcycles on e-Bay UK, British motorcycles on e-Bay North America
Re: Monobloc 376 body numbers
John Birkett #489455 05/09/13 1:07 pm
Joined: Dec 2002
Posts: 3,239
BritBike Forum member
Offline
BritBike Forum member
Joined: Dec 2002
Posts: 3,239
According to the list, all are 1 1/16". I don't think there would be hardly any difference in any of them if all have the original jet block.

Re: Monobloc 376 body numbers
leon bee #489467 05/09/13 2:03 pm
Joined: Aug 2012
Posts: 44
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Aug 2012
Posts: 44
Cheers,

I thought that but could not understand why AMAL list different suffixes.

It is going on my modded BSA B33 motor. On their website they list the same body, size and jets, but split those 3 different suffixes up for 3 different year ranges confused

Last edited by John Birkett; 05/09/13 2:04 pm.

Current rides = 1959 650 Matchless G12CSR in near showroom nick, 1956 BSA B33 in "Goldy" trim (yeh, I know, cheesy but I like it !)
Re: Monobloc 376 body numbers
John Birkett #489473 05/09/13 3:22 pm
Joined: Jun 2002
Posts: 873
Sponsor
Offline
Sponsor
Joined: Jun 2002
Posts: 873
John,

Any 376 1-1/16" Monoblock carb can be jetted to your needs. The suffixes are irrelevant at this point. They were just so AMAL could build carbs with specific jetting for specific models and be able to tell them apart once assembled. The first time someone went into the carb and changed something, say the main jet, the suffixes mean nothing any more. So don't worry what the carb has stamped on it, just worry about what jetting you want.

The only time you want the "correct" suffix number is if you are an authenticity buff and just have to have the "correct" number on your bike.

Peter


check out: www.bsaunitsingles.com
2500 BSA part numbers with inventory in stock just for the unit singles!
Re: Monobloc 376 body numbers
John Birkett #489474 05/09/13 3:24 pm
Joined: Aug 2012
Posts: 44
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Aug 2012
Posts: 44
Just for this forums future "searchers" =

I was not expecting a reply at all from AMAL as they say they cannot answer Q's about non standard motors, but within 2 hours of asking I got this =

Quote
Dear John

There is no significant difference between these carburetters. The difference between these specifications seems to have been in the length of the choke cables. Specification numbers can change for what can sometimes seem quite minor differences !

Kind regards,

Phil Beresford
Technical Sales Co-ordinator

Burlen Fuel Systems Limited - The SU and AMAL Carburetter Companies
Spitfire House, Castle Road, Salisbury, Wiltshire. SP1 3SA
Tel: +44 (0)1722 412500 Fax: +44 (0)1722 334221 Email: [email protected]


So they are the same !

So I have ordered one to replace the MK1 Concentric currently fitted = far to modern cool


Current rides = 1959 650 Matchless G12CSR in near showroom nick, 1956 BSA B33 in "Goldy" trim (yeh, I know, cheesy but I like it !)

Moderated by  Alan_nc 

Link Copied to Clipboard
Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | DVD- Manuals & Parts books
Upgrade to: Gold Membership | Premium Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.7.4