Shop genuine Amal carburetors and parts for classic Triumph, Norton and BSA motorcycles. Our selection covers Monobloc, Mk1 Concentric 600 and 900 series, Premier and Mk2 carburetors. It also includes main jets, pilot jets, needle jets, jet needles, throttle slides, StayUp floats, gasket sets and overhaul kits. Before you order, find the type and specification number stamped on your carburetor and match it to the part number in the listing. Need a complete carburetor? See complete vintage British motorcycle carburetors. Rebuilding instead? Start with our Amal carb fitment guide.
Amal Concentric 626 928 930 932 Brass Float Bowl Drain Plug(s) PN# 622/155 622/151 622/147 99-1152 99-1152
$18.33 – $30.36Price range: $18.33 through $30.36
Triumph Norton BSA MK2 Amal 2A1 Needle(s) PN# 2622/124
$36.32 – $68.50Price range: $36.32 through $68.50
Genuine Amal MKII Float Needle(s) Viton Rubber Tipped Triumph PN# 622/149
$27.61 – $48.42Price range: $27.61 through $48.42
Triumph BSA 500 Pre-Unit and Unit Amal 376 626 Carb Air Filter Adapter Ring(s) PN# 70-4576 E4576 71-2086
$14.34 – $23.31Price range: $14.34 through $23.31
Triumph Norton BSA Amal Thin High Temp Carb Mounting O-Ring(s) PN# 622/101 99-0552
$7.25 – $8.57Price range: $7.25 through $8.57
Triumph Norton BSA Genuine Amal 928 930 932 Concentric Gasket Washer Set(s) PN# 622/208
$20.14 – $33.81Price range: $20.14 through $33.81
Genuine Early Amal Concentric #25 Pilot/Cold Start Jet(s) Triumph BSA Norton PN# 124/026-25
$15.71 – $24.47Price range: $15.71 through $24.47
Triumph Norton BSA Genuine Amal Throttle Stop Screw with O-Ring(s) PN# 622/077 622/082 99-0516 99-0520
$10.08 – $16.79Price range: $10.08 through $16.79
Triumph Norton BSA Genuine Amal Throttle Needle(s) PN# 622/124 99-1036
$34.70 – $63.98Price range: $34.70 through $63.98
Triumph Norton BSA Amal Matchless AJS Concentric Needle Clip(s) PN# 622/067
$11.56 – $16.26Price range: $11.56 through $16.26
Triumph Norton BSA Amal Concentric Banjo Bolt(s) PN# 622/078 99-0517
$14.80 – $22.75Price range: $14.80 through $22.75
Genuine Amal Triumph Norton BSA etc. 389 Monobloc Gasket Kit(s) PN# 389/121 A RKC/500
$14.49 – $23.59Price range: $14.49 through $23.59
Genuine Amal Throttle Slide Original Zinc Alloy PN# 622/060 928/060
$57.61 – $89.87Price range: $57.61 through $89.87
Genuine Amal Throttle Slide Hard Anodized PN# 622/060 HA 928/060 HA
$90.34 – $120.49Price range: $90.34 through $120.49
Genuine Amal Concentric Jet Holder(s) Fits All Concentrics PN# 622/128 99-1034
$22.53 – $38.49Price range: $22.53 through $38.49
Norton BSA Triumph etc. Amal 389 Monobloc Gasket Kit(s) PN# TBS-0044 389/121
$12.96 – $20.71Price range: $12.96 through $20.71
Norton BSA Triumph etc. Genuine Amal Concentric Overhaul Kit(s) PN# 622/238
$46.07 – $127.22Price range: $46.07 through $127.22
Triumph BSA Norton Genuine Amal Concentric Extended Tickler Kit(s) PN# 622/172
$16.50 – $26.75Price range: $16.50 through $26.75
Triumph BSA Norton Genuine Amal Concentric 600 900 Series Float(s) PN# 622/069
$29.61 – $52.84Price range: $29.61 through $52.84
Triumph Bonneville 1979 And 80 Genuine MK2 Amal Concentric Carb Washer Set(s) PN# 2622/144
$26.61 – $47.47Price range: $26.61 through $47.47
Triumph 1979-82 Bonneville Amal MKII Cold Start Plunger Kit(s) PN# 2622/079
$56.10 – $108.00Price range: $56.10 through $108.00
Triumph Norton BSA etc Genuine Amal 180 Degree 1/4-inch Banjo(s) PN# 376/419
$36.02 – $67.94Price range: $36.02 through $67.94
Triumph Norton BSA Genuine Amal Main Jet(s) All Sizes PN# 376/100
$12.96 – $32.13Price range: $12.96 through $32.13
Triumph BSA Norton Genuine Amal Concentric Needle Jet(s) PN# 622/122
$23.50 – $46.55Price range: $23.50 through $46.55
Genuine Amal Throttle Slide Hard Anodized # 3.0 Cutaway 600 Series Concentric Carburetors (1) PN# 622/060 3.0 HA
Original price was: $82.95.$72.95Current price is: $72.95.
Triumph Norton BSA Pilot Jet Genuine Amal PN# 622/502 A
$44.45 – $99.34Price range: $44.45 through $99.34
Table of Contents
About Amal Carburetors
Amal started in 1927, when Brown and Barlow, Amac and C. Binks merged to form Amalgamated Carburetters Ltd. The name was shortened to Amal Ltd in 1931. Amal carburetors were fitted to many Triumph, Norton and BSA motorcycles, and the company’s official history traces the main designs: the Monobloc in 1954, the Mk1 Concentric 600 and 900 series in 1967, and the aluminium-bodied Concentric Mk2 in 1973. The business was acquired by Burlen in 2003, and Burlen still makes and supplies genuine Amal carburetors and spares. For more background, see the Amal entry on Wikipedia.
Which Amal Carburetor Do You Have?
Find your carburetor family before ordering. Jets, slides, needles, floats and gaskets are not always interchangeable between families. According to Amal’s identification FAQ, Monoblocs have the specification number stamped on top of the mounting flange. Mk1 and Mk2 Concentrics have it on the side of the body.
| Family | Introduced | How to recognize it | Where the number is | In our range |
|---|---|---|---|---|
| Monobloc (375, 376, 389) | 1954 | Float chamber cast into the side of the body | Top of the mounting flange | 376 and 389 Monobloc carburetors, jet holders, needle jets, gasket kits and a major overhaul kit with StayUp float |
| Mk1 Concentric (600 / 900 series) | 1967 | Round float bowl centred under the main jet; flange mounting | Raised pad on the side of the body | 626, 928, 930 and 932 carburetors and a wide range of Concentric spares |
| Premier (updated Mk1 Concentric) | Later redesign | Hard-anodised slide, removable pilot jet, StayUp float | Raised pad; “Prem” added to the spec number | 626, 928, 930 and 932 Premier carburetors and sets, including aluminium versions |
| Mk2 Concentric | 1973 | Square-section float bowl, aluminium body, cold-start plunger | Side of the body | Mk2 slides, needles, jets, washer sets and cold-start plunger kits |
On a Mk1 Concentric, the three-digit number gives the series and bore size. For example, “928” is a 28mm 900 series carburetor. The specification number stamped below it identifies the original jetting and application. An “R” or “L” stamp shows whether the carburetor is right- or left-handed. See Amal’s guides to rebuilding the Mark 1 Concentric and choosing the right carburetter for more on how the numbering works.
Amal Monobloc Carburetors and Parts
The Monobloc was standard on many British singles and twins from the mid-1950s until the Concentric replaced it. Our Monobloc range includes 1-1/8-inch 389 carburetors listed for Triumph TR6, T120 and BSA A65 applications, a 1-1/16-inch 376 carburetor, and 376- and 389-series gasket kits, jet holders, needle jets and banjos. Each listing gives the jetting it is supplied with. Check the bore size and specification against your parts book. Amal’s Monobloc specification number list helps you work out original applications.
Amal Mk1 Concentric and Premier Carburetors
The Mk1 Concentric comes in two body sizes: the 600 series (22–27mm) and the 900 series (28–32mm). The same design can be built as a left- or right-hand carburetor. We stock 626 (26mm) carburetors for 1968–74 Triumph 500 twins, a 928 (28mm) Premier aluminium carburetor for the BSA A65 Thunderbolt, 930 (30mm) Premier singles and pairs for Triumph and BSA twin-carb models, and a 932 (32mm) Premier set specified for the Norton 850 Commando.
According to Amal, the Amal Premier is a redesigned Mk1 Concentric. It has a hard-anodised throttle slide, a revised idle circuit, an ethanol-resistant StayUp float, a Viton-tipped alloy float needle and a removable pilot jet. Premier aluminium bodies are lighter than the traditional zinc-alloy castings. Note that Amal says the Premier pilot jet can’t be fitted to earlier Mk1 Concentrics.
For Triumph applications, browse our Triumph carburetor and fuel parts. For Nortons, see Norton carburetor parts, and for BSAs, BSA carburetor and fuel parts.
Amal Mk2 Concentric Parts and Conversion Kits
Triumph fitted Amal Mk2 Concentrics to 750 Bonnevilles from the 1978½ model year. We carry Mk2 throttle slides, jet needles, pilot jets, Viton-tipped float needles, a washer set for 1979–80 Bonnevilles and a cold-start plunger kit for 1979–82 Bonnevilles. For 1978½-on T140 models we also list a Mk2 UK-spec upgrade kit and a Premier 930 conversion kit that replaces the Mk2 setup. Both kits change the fuel system, so read the full listing for what’s included and what your engine needs. If you’re working on a Bonneville, see also our Triumph Bonneville aftermarket parts.
Amal Jets, Needles and Throttle Slides
Each part controls the mixture over part of the throttle range. Roughly: the pilot circuit handles idle, the throttle slide cutaway handles about 1/8 to 1/4 throttle, the jet needle and needle jet handle about 1/4 to 3/4 throttle, and the main jet takes over from about 3/4 to wide open. Our range includes main jets in all sizes, Monobloc and Concentric needle jets, standard and Mk2 jet needles, and throttle slides in original zinc alloy and hard-anodised versions in a choice of cutaways. Our Triumph carb tuning basics explains the tuning sequence. Amal’s own tuning guide is also worth keeping in the workshop.
When ordering, pay attention to part-number suffixes, slide cutaway numbers and needle references. They differ between carburetor families. Amal notes that its genuine jets are calibrated to a flow rate, not simply drilled to a size.
Amal Floats, Float Needles and Fuel Level
A sticking or saturated float can cause flooding, rich running or fuel starvation. We stock standard Concentric floats, Mk1 StayUp floats, Viton-tipped float needles and Premier aluminium float needles. Amal gives a Mk1 Concentric fuel-level procedure and background on the StayUp float. For more on float types and setup, read our guide to Amal Concentric floats.
Chokes, Ticklers and Cold Starting
Mk1 Concentrics can be fitted with a cable-operated choke (air slide). We sell the 900-series choke kit and its individual parts: the air slide, guide sleeve and spring. We also carry extended tickler kits for easier priming. To learn how the choke works and when you need it, read Understanding the Choke on Amal Concentric Mk1 Carburetors.
Fitting and Mounting Amal Carburetors
Many running problems after a rebuild come from how the carburetor was mounted. Overtightening the flange nuts can warp the mounting flange and make the slide stick. The O-ring only needs enough compression to make an airtight seal. These guides cover the details:
- Amal Carb Fitment: An Everyman’s Guide: preparation, float height, cable fitting and synchronizing twin carbs.
- Carburetor Mounting O-rings: 622/101 Thin vs 70-9711 Thick: which O-ring and mounting hardware suit your model year.
- How to Fit New Concentric Carbs With Old Cables: changing modern carb tops to suit original Triumph cables.
- Ultimate Guide to Cables: throttle cable free length, routing and handlebar changes.
- Amal’s installation guidance for Mk1 Concentrics.
Replacement throttle and choke cables are in our Triumph cables, Norton cables and BSA cables collections. We also carry cables from Venhill, Barnett and Doherty.
Gaskets, Overhaul Kits and Small Parts
Use new gaskets and O-rings every time you strip a carburetor. Our range includes Monobloc gasket kits, Concentric gasket and washer sets, Concentric overhaul kits, a Monobloc major overhaul kit with StayUp float, mounting O-rings, banjo bolts, throttle stop screws, needle clips, float bowl drain plugs, cable junction blocks and a #78 pilot jet drill tool. For more seals and gaskets, see carburetor gaskets and seals and our wider range of carburetor spares and parts. For fuel lines, see Tricor.
Complete Carburetors or Rebuild?
If the slide or mixing-chamber body is badly worn, new jets and needles won’t make the carburetor tune correctly, and a new carburetor is usually the better value. Compare options in complete carburetors and our classic British motorcycle Amal carburetors collection. If you’re comparing Concentric-pattern alternatives, see Wassell.
Parts Books, Manuals and Tools
The original parts book is the most reliable way to confirm carburetor specification numbers. Find yours in Triumph parts books, Norton parts books, BSA parts books, Triumph manuals, Norton manuals and BSA manuals, or browse all books and manuals. For workshop equipment, see specialty tools, workshop tools and shop supplies.
Shop by Motorcycle
- Vintage Triumph parts
- Norton Commando parts
- BSA motorcycle parts
- Andover Norton parts
- All classic British motorcycle parts
Need Help Choosing Amal Parts?
Our technical team, Dave Porter and Mike Grage, answers carburetor questions every day. Have your make, model, year and the numbers stamped on your carburetor ready, then contact us. You can also read more articles on our tech blog, check our general FAQ, review shipping and returns, or explore our other classic British motorcycle brands.
Amal Carburetor FAQs
What Amal carburetor parts does The Bonneville Shop sell?
We sell complete Amal Monobloc, Mk1 Concentric and Premier carburetors, plus Mk2 Concentric parts. Our range includes main jets, pilot jets, needle jets, jet needles, throttle slides, floats, float needles, choke kits, gasket sets, overhaul kits and small hardware for classic Triumph, Norton and BSA motorcycles.
How do I identify my Amal carburetor?
Look for the stamped numbers. On Monoblocs, the specification number is on top of the mounting flange. On Mk1 and Mk2 Concentrics, it is on the side of the body. On a Mk1 Concentric, the three-digit number shows the series and bore size: 928 means a 28mm 900 series carburetor. The number below it shows the original jetting and application.
What is the difference between an Amal Monobloc and an Amal Concentric?
The Monobloc, introduced in 1954, has its float chamber cast into the side of the body. The Mk1 Concentric, introduced in 1967, has a float bowl centred under the main jet, and the same design can be built as a left- or right-hand carburetor. Many parts are not interchangeable between the two families.
What is an Amal Premier carburetor?
The Premier is Amal’s redesigned Mk1 Concentric. It has a hard-anodised throttle slide, a revised idle circuit, a removable pilot jet, an ethanol-resistant StayUp float and a Viton-tipped alloy float needle. Aluminium-bodied Premier versions are lighter than traditional zinc-alloy carburetors.
Can I fit a Premier pilot jet to my older Mk1 Concentric?
No. Amal states that the removable Premier pilot jet cannot be fitted to earlier versions of the Mk1 Concentric. Earlier carburetors keep their original pilot arrangement, which you can clean and service.
Which Amal carburetor fits my Triumph, Norton or BSA?
It depends on the model, year and whether the bike has one or two carburetors. Examples from our range: 626 carburetors for 1968–74 Triumph 500 twins, 389 Monoblocs for Triumph TR6, T120 and BSA A65 models, 930 Premier sets for Triumph and BSA twin-carb models, and a 932 Premier set specified for the Norton 850 Commando. Check the application in each product listing against your parts book.
Are Amal carburetors compatible with ethanol fuel?
Amal states that its current products are suitable for modern fuel. Its StayUp float is described as ethanol-resistant and puncture-proof. Older carburetors may still have original floats, float needles or seals that should be inspected or replaced.
Are genuine Amal jets different from pattern jets?
Amal states that its genuine jets are calibrated to a flow rate, not simply drilled to a size, and are branded with the Amal logo. Our listings identify genuine Amal parts so you can see which products are original-manufacturer items.
How do I count needle clip positions on an Amal carburetor?
Count from the top down. Amal applies this to all of its carburetors. Raising the needle (moving the clip down a groove) richens the mixture between about 1/4 and 3/4 throttle. Lowering the needle leans it.
Should I rebuild my Amal carburetor or replace it?
If the throttle slide and mixing chamber are only lightly worn, a rebuild with a new needle jet, gaskets, float needle and correct jets is often enough. If the slide or body is badly worn, or the flange is warped, the carburetor won’t tune properly, and a new carburetor is usually the better value.
Why does my Amal carburetor slide stick after fitting?
A common cause is overtightening the flange nuts, which warps the mounting flange or body. Another is a throttle cable that doesn’t have enough free length. Only compress the O-ring enough to seal. Read our carb fitment guide and O-ring guide for mounting hardware details.
Can The Bonneville Shop help me choose the right Amal parts?
Yes. Contact our technical team with your motorcycle make, model and year, plus the numbers stamped on your carburetor. We’ll help you match jets, slides, needles, floats and complete carburetors to your application.