British Iron

Mikuni VM Jetting Examples for British Motorcycles

FastCounter by bCentral

    The settings in the tables below have been contributed by owners and tuners. Please feel free to compare these to your own preferences, and contribute those most favorable along with comments etc.
    Click here to submit your jetting: . You can also do this by editing the page in NS or IE: on your browser toolbar click “File”, then “Edit Page”, and e-mailing it to me with the values already in the appropriate cells in a blank table: on your browser toolbar click “File”, then “Send Page”.

Anonymous

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

Triumph

T150V

750

3 × 28mm

32.5

2.0

stock exhaust

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

169

O-0

5EJ11

 

140

1.0

IMHO pilot & slide are rich

Stan Smith of Rocky Point Cycle

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

Triumph

Daytona

500

1 × 28mm

35

2.5

If idle is too rich use 30 pilot

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

169

O-4

5F21

5 (bottom)

140

.5

 

Daytona Owners web site

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

Triumph

Daytona

500

2 × 26mm

30

2.5

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

182?

 

5F21

 

120

 

 

Sudco

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

1950s Matchless/AJS

single

500

34mm

30

3.5

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

159

Q-0

6FJ6

 

240

2.0

 

Grog

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

1950s Matchless/AJS

single

500

34mm

25

2.5

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

159

P-2

6DH4

 

240

2.0

Not evaluated yet - use at your own risk

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

Source

Brand
(BSA, &c.)

Engine Type
(Gold Star, &c.)

Displacement
(500, &c.)

Carburetor Size
(32, &c.)

Pilot Jet
(25, &c.)

Slide Cutaway
(2.5, &c.)

Modifications
(cam, pipes, &c.)

 

 

 

 

 

 

 

Needle Jet Type
(166, &c.)

Needle Jet Size
(P-2, &c.)

Needle
(6DP1, &c.)

Clip Position
(top, 3rd, &c.)

Main Jet
(240, &c.)

Air Jet
(1.0, &c.)

Comments

 

 

 

 

 

 

 

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