Dellorto UB and MB Carburetor Parts
Dellorto UB and MB Carburetor Parts

Dellorto UB and MB Parts

Dellorto UB and MB Carburetor Parts.

On this page you will find all currently available parts for the Dellorto MB and UB range carburettors.

Click HERE for an exploded view drawing of the Dellorto UB / MB.

The numbers in the drawing correspond to the numbers in brackets at the beginning of the article description.

We are still very much expanding our parts offerings for vintage motorcycle carburettors so please contact us by email if the part that you are looking for is not listed.

Dellorto UB and MB Carburetor Parts

!
1486
(4) Main Jet for the Dellorto UB and MB carburetors

(4) Main Jet for the Dellorto UB and MB carburetors

Factory original main jet for the Dellorto UB and MB carburetors.

We only supply original Dellorto jets, marked with the famous diamond-shaped "Inc" logo.

Available from our stock in sizes:

  • 33
  • 35
  • 40
  • 45
  • 48
  • 50
  • 53
  • 55
  • 58
  • 60
  • 62
  • 65
  • 67
  • 72
  • 80
  • 82
  • 84
  • 86
  • 88
  • 90
  • 118
  • 120

Most other sizes are available on special order. Please contact us by email with your exact requirements.

Required quantity per carburettor: 1

This is item number 4 in the drawing.

(4) Main Jet for the Dellorto UB and MB carburetors

1607
(6) Long Float Needle for Dellorto UB and MB carburetors

(6) Long Float Needle for Dellorto UB and MB carburetors

Long float needle for the Dellorto UB and MB series carburetors.

Is used in combination with Float Number 7 in the drawing.

Required quantity per carburettor: 1

This is item number 6 in the drawing.

This is a genuine Dellorto part.

(6) Long Float Needle for Dellorto UB and MB carburetors

2390
(7) Float for Dellorto UB and MB carburetors

(7) Float for Dellorto UB and MB carburetors

Original Float for the Dellorto UB and MB carburetors.

Please note that there are two different kinds of floats for these carburetors. These versions are NOT interchangeable!

This is # 7 in the drawing that uses a long, thin, needle valve.

It is available in 2 weights:

  • 6.5 gram
  • 7.5 gram

We also strongly advise against experimenting with float weights so if your float is damaged or leaking, please replace it by one of the same version and weight.

Please note that the needle retaining clip is already installed.

Required quantity per carburettor: 1

This is item number 7 in the drawing.

This is a genuine Dellorto part.

(7) Float for Dellorto UB and MB carburetors

3076
(8) Float for Dellorto UB and MB carburetors

(8) Float for Dellorto UB and MB carburetors

Original Float for the Dellorto UB and MB series carburetors.

This is the 6 gram version.

Please note that there are two different kinds of floats for these carburetors. These versions are NOT interchangeable!

This is # 8 in the drawing that uses a float arm and a short, stubby, needle valve.

We also strongly advise against experimenting with float weights so if your float is damaged or leaking, please replace it by one of the same version and weight.

Required quantity per carburettor: 1

This is item number 8 in the drawing.

This is a genuine Dellorto part.

(8) Float for Dellorto UB and MB carburetors

1104
(10) Cable Adjuster for Dellorto UB and MB carburetors

(10) Cable Adjuster for Dellorto UB and MB carburetors

Cable Adjuster for Dellorto UB and MB carburetors.

This cable adjuster uses Lock Nut 1691 to secure its setting.
For your convenience, you can order this lock nut right along with this adjuster by simply selecting it through the drop box above.

Required quantity per carburettor: 1

This is item number 10 in the drawing.

This is a genuine Dellorto part.

(10) Cable Adjuster for Dellorto UB and MB carburetors

1691
(11) Locknut for cable adjuster on Dellorto UB and MB carburetors

(11) Locknut for cable adjuster on Dellorto UB and MB carburetors

Lock nut that secures the setting on the throttle cable adjuster on the Dellorto UB and MB series carburetors.

Required quantity per carburettor: 1

This is item number 11 in the drawing.

 

 

(11) Locknut for cable adjuster on Dellorto UB and MB carburetors

3570
(13) Choke Clip for the Dellorto UB and MB carburetors

(13) Choke Clip for the Dellorto UB and MB carburetors

Clip to secure the choke on the Dellorto UB and MB series carburetors.

Required quantity per carburettor: 1

This is item number 13 in the drawing.

This is a genuine Dellorto part.

 

(13) Choke Clip for the Dellorto UB and MB carburetors

2372
(14) Slide Return Spring for Dellorto UB and MB carburetors

(14) Slide Return Spring for Dellorto UB and MB carburetors

Slide return spring for the Dellorto UB and MB series carburetors.

Please note that Dellorto themselves no longer produce this spring.

Hence, this is a current reproduction that is slightly stronger than the original.

Required quantity per carburettor: 1

This is item number 14 in the drawing.

This is a genuine Dellorto part.

(14) Slide Return Spring for Dellorto UB and MB carburetors

1407
(15) Needle Clip for the Dellorto UB and MB carburettors

(15) Needle Clip for the Dellorto UB and MB carburettors

Clip to secure the needle on the Dellorto UB and MB carburetors.

Required quantity per carburettor: 1

This is item number 15 in the drawing.

This is a genuine Dellorto part.

 

(15) Needle Clip for the Dellorto UB and MB carburetors

1494
(20) Fuel Union Nut for Dellorto UB and MB carburetors

(20) Fuel Union Nut for Dellorto UB and MB carburetors

New-Old-Stock Fuel Union Nut for the Dellorto UB and MB series carburetors.

Please note that as this is an original old stock item, the surface finish might be less-than-perfect.

Required quantity per carburettor: 1

This is item number 20 in the drawing.

This is a genuine Dellorto part.

 

(20) Fuel Union Nut for Dellorto UB and MB carburetors

1416
(21) Fuel Banjo Fiber Ring for the Dellorto UB and MB carburettors

(21) Fuel Banjo Fiber Ring for the Dellorto UB and MB carburettors

Fiber ring to seal the fuel banjo on the Dellorto UB and MB carburetors.

This ring has an internal diameter of 13.75 mm.

Required quantity per carburettor: 2

This is item number 21 in the drawing.

 

(21) Fuel Banjo Fiber Ring for the Dellorto UB and MB carburetors

1419
(23) Fuel banjo filter for the Dellorto UB and MB carburettors

(23) Fuel banjo filter for the Dellorto UB and MB carburetors

Fuel banjo filter for Dellorto UB and MB carburetors.

Required quantity per carburettor: 1

This is item number 23 in the drawing.

This is a genuine Dellorto part.

 

(23) Fuel banjo filter for the Dellorto UB and MB carburetors

1491
(26) Bolt for Float Bowl Cover on Dellorto UB and MB carburetors

(26) Bolt for Float Bowl Cover on Dellorto UB and MB carburetors

Bolt to secure the float bowl cover on Dellorto UB and MB carburetors.

Required quantity per carburettor: 2

This is item number 26 in the drawing.

This is a genuine Dellorto part.

 

 

(26) Bolt for Float Bowl Cover on Dellorto UB and MB carburetors

5010
(27) Spring Washer for Dellorto UB and MB carburetors

(27) Spring Washer for Dellorto UB and MB carburetors

Spring washer for the Dellorto UB and MB carburetors.

Required quantity per carburettor: 2

This is item number 27 in the drawing.

 

 

 

(27) Spring Washer for Dellorto UB and MB carburetors

1414
(31) Float Bowl Gasket for Dellorto UB and MB carburetors

(31) Float Bowl Gasket for Dellorto UB and MB carburetors

Gasket to seal the float bowl and float chamber top on the Dellorto UB and MB carburetors.

Required quantity per carburettor: 1

This is item number 31 in the drawing.

This is a genuine Dellorto part.

 

 

(31) Float Bowl Gasket for Dellorto UB and MB carburetors

2115
(32) Mixture Screw for Dellorto UB and MB carburetors

(32) Mixture Screw for Dellorto UB and MB carburetors

Mixture screw for the Dellorto UB and MB carburetors.

Required quantity per carburettor: 1

This is item number 32 in the drawing.

This is a genuine Dellorto part.

 

 

(32) Mixture Screw for Dellorto UB and MB carburetors

1411
(33) Spring for Dellorto UB and MB carburetors

(33) Spring for Dellorto UB and MB carburetors

Spring to secure the setting of the throttle stop screw and mixture screw on the Dellorto UB and MB carburetors.

Required quantity per carburettor: 2

This is item number 33 in the drawing.

This is a genuine Dellorto part.

 

 

(33) Spring for Dellorto UB and MB carburetors

1095
(34) Slide Stop Screw for Dellorto UB and MB carburetors

(34) Slide Stop Screw for Dellorto UB and MB carburetors

Slide Stop Screw for Dellorto UB and MB carburetors.

Required quantity per carburetor: 1

This is item number 34 in the drawing.

This is a genuine Dellorto part.

 

 

 

(34) Slide Stop Screw for Dellorto UB and MB carburetors

1382
(35) Fiber Washer for the Float Bowl for Dellorto UB and MB carburetors

(35) Fiber Washer for the Float Bowl for Dellorto UB and MB carburetors

Fiber washer to seal the connection of the float bowl to the carburettor body on the Dellorto UB and MB carburetors.

Required quantity per carburettor: 2

This is item number 35 in the drawing.

 

 

 

(35) Fiber Washer for the Float Bowl for Dellorto UB and MB carburetors

2200
(36) Vertical Float Bowl for Dellorto UB and MB carburetors *Discontinued*

(36) Vertical Float Bowl for Dellorto UB and MB carburetors *Discontinued*

Vertical float bowl to suit the Dellorto UB and MB carburetors.

Required quantity per carburettor: 1

This is item number 36 in the drawing.

 

 

 

(36) Vertical Float Bowl for Dellorto UB and MB carburetors *Discontinued*

This float bowl is NO LONGER SUPPLIED by Dellorto and existing stocks have been depleted !

2838
(43) Needle Valve for the Dellorto UB and MB carburettors

(43) Needle Valve for the Dellorto UB and MB carburettors

Genuine Dellorto, viton-tipped, needle valve for the Dellorto MB and UB carburetors.

This is the solid brass version with, of course, the famous red Viton tip for perfect sealing properties.

Please note that this needle is only used in conjunction with float # 8 in the drawing. NOT with float # 7!

Required quantity per carburettor: 1

This is item number 43 in the drawing.

This is a genuine Dellorto part.

(43) Needle Valve for the Dellorto UB and MB carburetors

1096
(51) Slide Stop Screw Locknut for Dellorto UB and MB carburetors

(51) Slide Stop Screw Locknut for Dellorto UB and MB carburetors

Slide Stop Screw Locknut for Dellorto UB and MB carburetors.

Required quantity per carburetor: 1

This is item number 51 in the drawing.

This is a genuine Dellorto part.

 

 

 

(51) Slide Stop Screw Locknut for Dellorto UB and MB carburetors

UBGASKETSET
(52) Service Kit for the Dellorto UB and MB carburetors

(52) Service Kit for the Dellorto UB and MB carburetors

Service Kit for the Dellorto UB and MB carburetors.

Contains all required fiber rings, a float chamber gasket, fuel filter and needle clip.

Required quantity per carburetor: 1

This is item number 52 in the drawing.

 

(52) Service Kit for the Dellorto UB and MB carburetors

3100
Aluminum Trumpet for the Dellorto UB and MB carburetors

Aluminum Trumpet for the Dellorto UB and MB carburetors

Screw-on aluminum trumpet for the Dellorto UB and MB carburetors with an external thread size of M32 x 1.25mm.

Dimensions:

  • Overall length: 65 mm
  • Width: 40 mm at the widest point

Required quantity per carburettor: 1

This item is NOT shown in the drawing.

Manufactured from a solid billet of aluminium.

Aluminum Trumpet for the Dellorto UB and MB carburetors

MTC02
50 mm Trumpet with Gauze for Dellorto UB MB PHBG and VHB 20 - 26 carburetors

50 mm Trumpet with Gauze for Dellorto UB MB PHBG and VHB 20 - 26 carburetors

Screw-on aluminum trumpet for Dellorto carburetors with an external thread size of M32 x 1.25mm.

Fit the following carburetors:

  • Dellorto UB
  • Dellorto MB
  • Dellorto PHBG
  • Dellorto VHB 20-26

Please verify that your carburetor has the correct thread size and type.

Dimensions:

  • Trumpet length: 50 mm
  • Gauze length: 15 mm
  • Total length: 65 mm
  • Width: 65 mm at the widest point

Required quantity per carburettor: 1

This item is NOT shown in the drawing.

Manufactured from a solid billet of aluminium with crimped-on Gauze filter.

50 mm Trumpet with Gauze for Dellorto UB MB PHBG and VHB 20 - 26 carburetors

F8/10
Tipo F8/10 Airfilter for Dellorto UB and MB carburetors

Tipo F8/10 Airfilter for Dellorto UB and MB carburetors

Vintage original (and rare!) Tipo F8/10 wire mesh airfilter for, amongst others, the UB and MB series, carburetors.

Will fit carburetors with a M38 x 1.25 thread.
Please check this carefully against your requirements.

Overall diameter: 98 mm
Depth: 44 mm

Required quantity per carburetor: 1

This item is NOT shown in the drawing.

Only 1 available! First come, first serve!

This is a genuine Dellorto part.

Tipo F8/10 Airfilter for Dellorto UB and MB carburetors

flexoid5xa4
Set of 5 x A4 Sheets of Flexoid Gasket Paper Material

Set of 5 x A4 Sheets of Flexoid Gasket Paper Material

Set of 5 x A4 Sheets of Flexoid Gasket Paper Material.

Almost a "First Aid Kit" for the home mechanic!

This set of first quality gasket paper contains 5 sheets in DIN A4 size (300 x 210 mm or roughly 11.8 x 8.3 inches) in 5 different thicknesses.

You can cut these sheets to almost any desirable size and shape to help you out when the required gasket is not at hand.

The sheets are made of cellulose based, plasticised gelatin-impregnated material.

The sheets are of the following thickness:

  • 0.15MM
  • 0.25MM
  • 0.4MM
  • 0.8MM
  • 1.6MM

Set of 5 x A4 Sheets of Flexoid Gasket Paper Material

OWV
Sytec Fuel Line One Way Valve

Sytec Fuel Line One Way Valve

Sytec Fuel Line One Way Valve.

We have two versions available:

  • Suitable for 6 mm internal diameter fuel hoses
  • Suitable for 8 mm internal diameter fuel hoses

Silver anodized finish.

Prevents fuel from leaking back into the fuel tank.

Suitable for regular fuel, E10, E85 and Diesel.

Viton seals.

We strongly advise you to secure your fuel lines using our stainless steel jubilee clips, despite the barbed edge on these unions.
For your convenience, you can order these clips right along with the union by simply selecting it through the drop-box above.

Sytec Fuel Line One Way Valve

PRO805
Sytec Pro-Line in-line fuel filter - 8 mm

Sytec Pro-Line in-line fuel filter - 8 mm

In line fuel filter with cleanable / replaceable filter.

Suitable for 8 mm internal diameter fuel hoses.

Replacement filter elements are available HERE.

Chrome finish.

Toughened glass phial.

Suitable for system pressures of up to 10 PSI / 0.7 Bar.

Supplied with 2 Jubilee clips.

Couplings Specifications:
Fuel Unions for fuel lines with 8 mm internal diameter

Sytec Pro-Line in-line fuel filter - 8 mm

PRO896
Replacement elements for Sytec in-line fuel filter

Replacement elements for Sytec in-line fuel filter

3 replacement elements for the Sytec Pro-Line in-line fuel filter.

Come complete with new rubber seals.

These elements fit our PRO804 and PRO805 Sytec in-line fuel filters.

Suitable for system pressures of up to 10 PSI / 0.7 Bar.

 

 

 

 

Replacement elements for Sytec in-line fuel filter

jet sizer
Carburettor Jet Gauges

Carburettor Jet Gauges

Calibrated gauges to measure jet sizes.

The perfect way to determine the exact size of jets, regardless of what is indicated on them.

Sometimes jets are drilled out to requirement and / or the original indicators are removed or illegible which leaves you questioning the true size.

With these gauges, you can still determine which size these jets are.

Indispensable when working on modified carburettors!

Two different sets available:

Set 1: 20 gauges, ranging from 0,45 mm to 1,50 mm
Set 2: 16 gauges, ranging from 1,50 to 3,00 mm

Priced per set!

Carburettor Jet Gauges

JSG01
Jet size gauge 0.5 to 1.5 mm

Jet size gauge 0.5 to 1.5 mm

Jet sizing tool to measure jets between 0.5 and 1.5 mm internal diameter.

Measurements are taken by inserting the tapered needle into the jet.

The size can then directly be read from the scale.

 

 

 

Jet size gauge 0.5 to 1.5 mm

JDK01
54-Piece Jet Drill Set

54-Piece Jet Drill Set

Jet drill set comprising 50 jet drills and and 4 pin vises.

The perfect way to fine-tune any jet to suit your needs.

Also highly suited to clean clogged-up jets.

The set contains:

  • 4 pin vises to suit all drill sizes included
  • 10 drills ranging from 1,0 to 2,0 mm:
    1.0, 1.1, 1.2, 1.3, 1.5, 1.6, 1.7, 1.8, 1.9 & 2.0 mm
  • 20 drills ranging is size from 0.3 mm to 1.6 mm:
    0.3, 0.35, 0.4, 0.45, 0.50, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.2, 1.3, 1.4, 1.5 & 1.6 mm
  • 20 x drills Gauge Number 80 to 61 (0.343 to 0.991 mm / 0.0135 to 0.0390 inches )

54-Piece Jet Drill Set

JET REAMER
16-Piece Jet Reamer Set

16-Piece Jet Reamer Set

Jet reamer kit comprising 16 reamers and and a pin vise.

The perfect way to fine-tune any jet to suit your needs.

The set contains:

  • 1 pin vise to suit all reamer sizes in this set
  • 1 storage case
  • 16 reamers ranging is size from 0.33 mm to 2.00 mm:
    0.33; 0.40; 0.45; 0.50; 0.60; 0.70; 0.75; 0.80; 0.90; 1.00; 1.10; 1.20; 1.40; 1.60; 1.80; 2.00 mm

16-Piece Jet Reamer Set

G4074
Gunson Colortune See Through Spark Plug Kit

Gunson Colortune See Through Spark Plug Kit

Gunson Colortune See Through Spark Plug Kit.

The Tune-up plug for Petrol / LPG 2 and 4 stroke engines with single, twin or multiple carburettors or fuel injection systems.

The original and best tool for seeing what's happening inside the combustion chamber of the petrol engine.

It allows you to see the combustion and to adjust the mixture by color.

Fits most petrol engines in standard form with additional adapters available for vehicles with alternative sized spark plugs.

Additional Information

  • Kit includes: 14mm Short reach plug and Hexagonal adapter
  • Colortune will fit most vehicles
  • Kit complete with instructions in English
  • Extra adapter sizes available separately

Available in the following basic sizes:

  • 10 mm - Available from our Stock
  • 12 mm - Sold out at the moment !
  • 14 mm - Available from our Stock

For our complete offerings on Gunson Tools, please visit www.GunsonShop.com.

Gunson Colortune See Through Spark Plug Kit

Available as long as our limited stock lasts!

DD0906
Dellorto Carburatori Sticker - Large

Dellorto Carburatori Sticker - Large

Official issue sticker / decal with the Dellorto logo and Italian flag "tricolore" colors.

Measures 9 x 3 cm (3.54 x 1.2 inches).

This is Number 1 in the photograph.

Made of high quality vinyl.

 

 

 

Dellorto Carburatori Sticker - Large

DD0909
Dellorto Carburatori Sticker - Medium

Dellorto Carburatori Sticker - Medium

Official issue sticker / decal with the Dellorto logo and Italian flag "tricolore" colors.

Measures 8 x 4 cm (3.1 x 1.55 inches).

This is Number 2 in the photograph.

Made of high quality vinyl.

 

 

 

Dellorto Carburatori Sticker - Medium

DD0904
Dellorto Carburatori Sticker - Small - High

Dellorto Carburatori Sticker - Small - High

Official issue sticker / decal with the Dellorto logo and Italian flag "tricolore" colors.

Measures 6 x 3 cm (2.4 x 1.2 inches).

This is Number 3 in the photograph.

Made of high quality vinyl.

 

 

 

Dellorto Carburatori Sticker - Small - High

DD0905
Dellorto Carburatori Sticker - Small - Low

Dellorto Carburatori Sticker - Small - Low

Official issue sticker / decal with the Dellorto logo and Italian flag "tricolore" colors.

Measures 6 x 2 cm (2.4 x 0.8 inches).

This is Number 4 in the photograph.

Made of high quality vinyl.

 

 

 

Dellorto Carburatori Sticker - Small - Low

Patch
Dellorto Carburatori Sew-On Patch

Dellorto Carburatori Sew-On Patch

Official issue sew-on patch with the Dellorto logo and Italian flag "tricolore" colors.

Measures 12 x 6.5 cm (4.7 x 2.6 inches).

Elaborately embroidered.

 

 

Dellorto Carburatori Sew-On Patch