Adapters & Connectors

Motocarb stock a range of connectors to enable you to mount your carburettor.

30/5/25
All straight rubber connectors and all non Mikuni manufacture adapters have been made for many years by UK supplier. I recently got notification from the manufacturer that they were ceasing all production permanently with no notice period. This effectively means that after my stock has run down, there will be no more straight connectors of any size and 2 bolt adapters will only be available in the Mikuni sizes.
I will leave the page as it is for the moment, but some sizes will quickly become not available.

I don't stock carburettor rubbers.
I do stock straight rubber connectors or flanged adapters. Just to save the email, let me know which type you need. Both types are below.
If you need a straight connector, I need to know the spigot diameter and bore of the carburettor and the outside diameter of the stub on the engine that the connector fits over.
If you want a flanged adapter, I need the bolt centre distance, the bore and the spigot diameter of the carburettor.

Straight Connectors
These connectors are made in the UK to our own specification.
They have 3 internal dimensions.
A spigot diameter at each end to accept the carb and manifold.
A bore diameter which is normally the same size as the carburettor bore.
Straight connectors are supplied with 2 x 9mm narrow band stainless clips.
Please order using the dimensions below.

29 x 26 x 35     BSA / Triumph 3 cyl VM26
35 x 26 x 35
35 x 26 x 40
35 x 28 x 35
35 x 28 x 40
35 x 30 x 40
40 x 30 x 40
40 x 32 x 40
40 x 32 x 43
40 x 34 x 40
40 x 34 x 43
40 x 36 x 43
43 x 36 x 43
43 x 38 x 43
46 x 36 x 43     360cc / 370cc Pursang VM36
52 x 34 x 40     (BMW R series VM34)
52 x 36 x 43     (BMW R series VM36)
52 x 44 x 52     (G50 VM44)

We have many other size combinations in stock and can order "specials" to your specification. Usually about 10 day delivery.

We can also supply the above connector with a standard Mikuni 40mm carb spigot diameter and either a 32mm or 34mm bore diameter.
This allows you to fit the Mikuni VM32, VM34, TM32, TM34 aftermarket carburettors to your Suzuki.
£26.60 each supplied without clips.

Flanged Adapters
These flanged adapters are made in the UK and are the best quality you will find.
Supplied with a 9mm narrow band stainless clip.

Flanged adapters are identified by 4 measurements.
A: bolt centre distance.
B: bore diameter. This is normally the same diameter as the carb bore size (mm)
C: spigot diameter. This is the same size as the outer diameter of the carb spigot (mm).
D: bolt hole diameter. This is normally machined to be a clearance size for the bolt.

Sizes (AxBxCxD)

2" x 26 x 35 x 5/16"
2" x 28 x 35 x 5/16"
2" x 30 x 40 x 5/16"
2" x 32 x 40 x 5/16"
2" x 34 x 40 x 5/16"

60 x 30 x 40 x 8mm
60 x 32 x 40 x 8mm
60 x 34 x 40 x 8mm

62 x 32 x 40 x 6mm (Honda K4 fitted with 2 x VM32)
62 x 34 x 40 x 6mm (Honda K4 fitted with 2 x VM34)

63 x 35 x 40 x 8mm

65 x 38 x 43 (Gold Star fitted with VM36 or VM38)

70 x 34 x 40 x 8mm
70 x 36 x 43 x 8mm (SR500, XT500 fitted with VM36)
70 x 36 x 43 x 8mm (with vacuum port)
70 x 40 x 43 x 8mm

Mikuni Brand flanged adapters

VM36-200 70 x 40 x 43 x 8mm
VM40-200 75 x 46 x 52 x 8mm

HS42/018-42K (Harley)
HS42/062-42K (Harley)
HS42/062-45K (Harley)
HS42/018-45K (Harley)
HS42/062-48K (Harley)