Britbike forum

Classic British SparesKlempf British PartsBaxter CycleBritBike Sponsor SteadfastCyclesThe Bonneville ShopLowbrow CustomsGirling Classic MotorcycleLucas Classic MotorcycleHepolite PistonsIndustrial tec supply Classic Bike Parts Cheshire

Upgrade Your membership! Premium Membership Gold Membership Vendor Membership

New Sponsor post
New FAQ post
Photos on private message
by Mal Marsden - 06/16/22 7:00 pm
Manuals on DVD - Buy 4 for 3
All 4 DVD Manual
Member Spotlight
twinspin
twinspin
Reading UK
Posts: 749
Joined: November 2005
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Top Posters(30 Days)
reverb 69
kevin 52
Allan G 50
Top Likes Received (30 Days)
Cyborg 29
Newest Members
Ian Scotland UK, cherbini, grahamsmythe, Joe Santelik, Lord Hepcat
12,156 Registered Users
Who's Online Now
4 members (TinkererToo, L.A.B., gavin eisler, rocketgoldie), 27 guests, and 16 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums35
Topics76,286
Posts772,333
Members12,156
Most Online151
May 8th, 2022
Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
Joined: May 2022
Posts: 9
J
Britbike forum member
OP Offline
Britbike forum member
J
Joined: May 2022
Posts: 9
I am wanting to purchase for a new carburettor for my 1952 Triumph 6T, which is a single carb model.

I have come across the Wassell range and these seem to tick the box for me, however I am not sure which model I need, I have contacted a few companies and have had conflicting replies. I am wondering if anyone could help me to identify which model I need and which slide and jets, please see below:

The first company said i needed the 600 series 26mm model however did not reply with any slide or jet sizes:

26mm
https://www.classicmotorcyclespares...r-wassell-concentric-mk1-600-series.html

The second company sent the below and it looks seems for a single carb application you will need to change to a 3.5 slide and a 230 main jet, but I am unsure whether I would need the 28mm or 30mm model.

28mm
https://www.britishbikebits.com/928-300-wassell-carburettor
30mm
https://www.britishbikebits.com/930-300-wassell-carburettor

Many thanks in advance.

Triumphs on eBay
Joined: Jan 2012
Posts: 597
Likes: 15
P
Britbike forum member
Offline
Britbike forum member
P
Joined: Jan 2012
Posts: 597
Likes: 15
What was the stock carburetor? Wassels are same as AMAL re size and jetting. Sorry I can't be more helpful. I have Wassels and like them.

Joined: May 2022
Posts: 9
J
Britbike forum member
OP Offline
Britbike forum member
J
Joined: May 2022
Posts: 9
The stock carbs were SU MC2 which don't seem to be available anymore. It's weird as the other models in the workshop manual all had AMAL Monobloc carbs, so I am not sure why Triumph went with SU carbs just for this model, which is why I am finding it hard to find any useful information on alternatives.

Joined: Aug 2001
Posts: 9,094
Likes: 179
T
Britbike forum member
Online Content
Britbike forum member
T
Joined: Aug 2001
Posts: 9,094
Likes: 179
I think you’ll get on ok with 28 mm, unless your manifold and ports are sized for 1”, in which case 26 mm would probably be better.


Amateur Loctite enthusiast.
Joined: Jan 2014
Posts: 3,963
Likes: 47
R
Britbike forum member
Offline
Britbike forum member
R
Joined: Jan 2014
Posts: 3,963
Likes: 47
If I remember right the early 6T have the same size as the 500 but with other main jet.
I have a 26 in my 500 pre unit with a 180 main jet. The manual specified a smaller one but I have a bigger pinion and open exhausts. Also I use the bike at top gear almost all the time.

Joined: Jul 2012
Posts: 2,082
Likes: 31
A
Britbike forum member
Offline
Britbike forum member
A
Joined: Jul 2012
Posts: 2,082
Likes: 31
AMAL carbs are made by Burlen Fuels in Salisbury.
They also own SU.

Personally, if I owned a 52, I would buy AMAL over Wassell

Joined: Sep 2001
Posts: 3,498
Likes: 43
G
Britbike forum member
Offline
Britbike forum member
G
Joined: Sep 2001
Posts: 3,498
Likes: 43
If the SU is not available I would think an AMAL 276 or 289 (size dependent) would be the way to go as the Monobloc was not in use then with the Triumphs.

Gordo


The roadside repairs make for the best post ride stories.
Joined: Jul 2012
Posts: 2,082
Likes: 31
A
Britbike forum member
Offline
Britbike forum member
A
Joined: Jul 2012
Posts: 2,082
Likes: 31

Joined: Jan 2017
Posts: 2,160
Likes: 151
T
Britbike forum member
Offline
Britbike forum member
T
Joined: Jan 2017
Posts: 2,160
Likes: 151
Hi jamiebridge, I've notice lots of problems after owners bought Wassell carbs on the forums. I have no personal experience with Wassell carbs.

I can say from personal experience the modern new AMAL is a really good carb. Could you fit Concentric Premier? These are really good carbs & with the anodized slide have outstanding durability. Cost is higher, but I feel worth every penny.

I've changed compression ratios etc. It still takes similar mixture & same carb bore. What is the bore on the intake manifold?

I would email AMAL & see what they recommend. I found Phil very helpful. I'm near San Francisco so email conversations took a day at the shortest each. But it worked out good.
Don


1973 Tiger 750
Joined: Aug 2016
Posts: 638
Likes: 67
T
Britbike forum member
Online Content
Britbike forum member
T
Joined: Aug 2016
Posts: 638
Likes: 67
AMAL have not been able to make carbs for many months, I spoke with them early this week and they are expecting to start shipping in June.

Joined: Sep 2008
Posts: 1,941
Likes: 73
S
Britbike forum member
Offline
Britbike forum member
S
Joined: Sep 2008
Posts: 1,941
Likes: 73
Originally Posted by TinkererToo
Amal have not been able to make carbs for many months, I spoke with them early this week and they are expecting to start shipping in June.
Their policy appears to be to make a batch of say Concentrics and then move on to something else for a while, regardless of the demand? Kind of like how the Sovjet production planning used to be. Look where it got them. Concentrics seems to be "Temporarily out of stock" most of the time. No wonder there's a market for Wassels.

SR

Joined: Aug 2001
Posts: 9,094
Likes: 179
T
Britbike forum member
Online Content
Britbike forum member
T
Joined: Aug 2001
Posts: 9,094
Likes: 179
Originally Posted by Stein Roger
Originally Posted by TinkererToo
Amal have not been able to make carbs for many months, I spoke with them early this week and they are expecting to start shipping in June.
Their policy appears to be to make a batch of say Concentrics and then move on to something else for a while, regardless of the demand? Kind of like how the Sovjet production planning used to be. Look where it got them. Concentrics seems to be "Temporarily out of stock" most of the time…

SR

They don’t only tell us what we want- they tell us when we want it too!


Amateur Loctite enthusiast.
Joined: Nov 2002
Posts: 803
Likes: 15
T
Britbike forum member
Offline
Britbike forum member
T
Joined: Nov 2002
Posts: 803
Likes: 15
Triumphs were also made in batches by model.....


1958 5TA / T100
1965 T120R
1970 TR6
1970 TR6C
Joined: Aug 2001
Posts: 9,094
Likes: 179
T
Britbike forum member
Online Content
Britbike forum member
T
Joined: Aug 2001
Posts: 9,094
Likes: 179
Originally Posted by tiger_cub
Triumphs were also made in batches by model.....

And they compelled dealers to take the unpopular models.


Amateur Loctite enthusiast.
Joined: Aug 2016
Posts: 638
Likes: 67
T
Britbike forum member
Online Content
Britbike forum member
T
Joined: Aug 2016
Posts: 638
Likes: 67
Burley were genuinely unable to get the bodies made, it cost them dearly in lost sales not to be able to ship product. They are one of the more approachable manufacturers IME.

Joined: Jun 2019
Posts: 114
Likes: 9
M
Britbike forum member
Offline
Britbike forum member
M
Joined: Jun 2019
Posts: 114
Likes: 9
Originally Posted by TR7RVMan
Hi jamiebridge, I've notice lots of problems after owners bought Wassell carbs on the forums. I have no personal experience with Wassell carbs.

Only the first batch Concentrics from Wassell had a blocked passage…. That was a long time ago and solved since…

It is a fine product now “but wassell can not do much good in the eyes of some (and parrots) “ but the get better and better with their products..

But as said earlyer, a AMAL 276 or even 376 (monoblock) is more period correct than a Concentric on a ‘52 Triumph and when bought new, both very fine carbs…


Harold / Motolab.nl
BSA: WM20 '40 M21,B31 '54 B33 '55 ZB34GS '49, DBD34GS '58, DBD34GS ‘61
Triumph 5T '49 + T100 + speedkit
Moto Guzzi LeMans '79
BMW R51/3 '51, R100GS '89
Joined: Jul 2012
Posts: 2,082
Likes: 31
A
Britbike forum member
Offline
Britbike forum member
A
Joined: Jul 2012
Posts: 2,082
Likes: 31
AMAL /Burlen aren’t a multinational conglomerate.
It’s 20 people in a shed. (Exaggeration)

I’m just glad they exist

Joined: Sep 2013
Posts: 3,737
Likes: 241
Q
Britbike forum member
Offline
Britbike forum member
Q
Joined: Sep 2013
Posts: 3,737
Likes: 241
what on the bike now , an SU ?
these , I believe , use a different manifold ( with vertical studs )
and the closest substitute manifold for an AMAL would be a later 6T or T110 . ?

is the 6T of mild enough build to still use older carb specs ?
(then 27~ 28 mm )

an AMAL , substitute for the SU of the time , could be a pre-monoblok
like this ,... probably don't want to go here , this is over 300 £ ( and seems rmildly jetted ? )
https://www.feked.com/amal-276fg-1at-pre-monobloc-11-16-carburettor-triumph-6t-thunderbird.html

[Linked Image from feked.com]

specs says 1+ 1/16" , which rounds up to 27 mm

AMAL 276FG/1AT Pre-Monobloc 1+1/16 Carburettor - Triumph 6T Thunderbird
Suitable for
Triumph 650cc 6T 1951-1953
1+1/16" Bore
140 Main Jet
107 Needle Jet
3.5 Slide

Joined: Sep 2008
Posts: 1,941
Likes: 73
S
Britbike forum member
Offline
Britbike forum member
S
Joined: Sep 2008
Posts: 1,941
Likes: 73
Originally Posted by TinkererToo
Burley were genuinely unable to get the bodies made, it cost them dearly in lost sales not to be able to ship product. They are one of the more approachable manufacturers IME.
Originally Posted by AngloBike
AMAL /Burlen aren’t a multinational conglomerate.
It’s 20 people in a shed. (Exaggeration)

I’m just glad they exist
Quite. I do sympatize with them, it can't be easy. However, from a customer perspective the situation is frustrating. There's only so much one can do with distorted and worn carb bodies. I have felt bad for buying Wassel rip offs, I'd rather support Burlen/AMAL, but when those are what I can get...

SR

Joined: Sep 2014
Posts: 1,393
Likes: 26
T
Britbike forum member
Offline
Britbike forum member
T
Joined: Sep 2014
Posts: 1,393
Likes: 26
If you're concerned about appearances, a bike of that age won't look 'right' with a Concentric (whether Wassell or AMAL). I didn't know that Burlen were having such difficulties producing Concentrics. I hope they get things sorted soon. Their products are far superior to Wassell's offerings.


If anything other than a blank space is visible here, something's wrong.
Joined: Aug 2001
Posts: 9,094
Likes: 179
T
Britbike forum member
Online Content
Britbike forum member
T
Joined: Aug 2001
Posts: 9,094
Likes: 179
Originally Posted by Tigernuts
If you're concerned about appearances, a bike of that age won't look 'right' with a concentric (whether Wassell or Amal). I didn't know that Burlen were having such difficulties producing concentrics. I hope they get things sorted soon. Their products are far superior to Wassell's offerings.

The AMAL Concentrics I bought are not far superior to anything.


Amateur Loctite enthusiast.
Joined: Dec 2013
Posts: 6,151
Likes: 227
DOPE
Offline
DOPE
Joined: Dec 2013
Posts: 6,151
Likes: 227
Originally Posted by triton thrasher
The Amal Concentrics I bought are not far superior to anything.

original Jawa CZ Jikov carb carburetor rare

https://www.ebay.com/itm/324993023036

bolts right on to a 2-inch manifold.


i'm old enough to remember when patriotism meant not trying to overthrow the government.
Joined: Jan 2014
Posts: 3,963
Likes: 47
R
Britbike forum member
Offline
Britbike forum member
R
Joined: Jan 2014
Posts: 3,963
Likes: 47
Hi TinkererToo; do you say that they are unable to get the bodies made; so are not they that fabricate the carburetors?

Joined: Aug 2016
Posts: 638
Likes: 67
T
Britbike forum member
Online Content
Britbike forum member
T
Joined: Aug 2016
Posts: 638
Likes: 67
I expect that they do their own machining, but AFAIK the carb bodies are die cast, a specialised process .

Joined: Oct 2003
Posts: 4,366
Likes: 27
D
Britbike forum member
Offline
Britbike forum member
D
Joined: Oct 2003
Posts: 4,366
Likes: 27
Don- When I looked through this site for threads on Wassell carbs it seems that Wassell carbs are good and a lot cheaper.

Dave

Page 1 of 2 1 2

Moderated by  John Healy 

Link Copied to Clipboard
British Cycle SupplyMorries PlaceKlempf British PartsBSA Unit SinglesPodtronicVintage MagazineBritBike SponsorBritish Tools & FastenersBritBike Sponsor






© 1996-2022 britbike.com
Powered by UBB.threads™ PHP Forum Software 7.7.5