Mikuni Needle Information

Needle  Tapers.

Needle Jet Application Chart.

Needle Jet Sizes.

Letter

Taper.

Series No

Type

Main Jet

Size

Carb Type

Size

Dia.(mm)

Size

Dia.(mm)

Size

Dia.(mm)

A

0º 15'

159

P

Hexicon

O-0 R-8

30-36mm s

N-0

2.550

P-4

2.670

R-6

2.780

B

0º 30'

166

P

Hexicon

O-0 R-8

38mm s

N-2

2.560

P-5

2.675

R-8

2.790

C

0º 45'

171

P

Hexicon

O-0 Q-8

30mm f

N-4

2.570

P-6

2.680

Z-0

3.150

D

1º 00'

176

B

Hexicon

N-0 Q-8

30-36 s

N-5

2.575

P-8

2.690

Z-5

3.175

E

1º 15'

183

B

Hexicon

N-0 Q-8

38mm s

N-6

2.580

Q-0

2.700

AA-0

3.200

F

1º 30'

188

P

Hexicon

O-0 Q-8

32mm f

N-8

2.590

Q-2

2.710

AA-5

3.225

G

1º 45'

193

P

Hexicon

N-0 Q-8

24mm f

O-0

2.600

Q-4

2.720

BB-0

3.250

H

2º 00'

196

P

Round

O-0 Q-8

30-36mm s

O-2

2.610

Q-5

2.725

BB-5

3.275

I

2º 15'

205

P

Hexicon

O-0 Q-8

34mm f

O-4

2.620

Q-6

2.730

CC-0

3.300

J

2º 30'

211

P

Hexicon

N-0 Q-8

30-36mm s

O-5

2.625

Q-8

2.740

CC5

3.325

K

2º 45'

249

P

Hexicon

N-0 Q-8

24-28mm s

O-6

2.630

R-0

2.750

L

3º 00'

224

P

Hexicon

Z-0 CC-5

40-44mm s

O-8

2.640

R-2

2.760

M

3º 15'

P= mainly used in 2-S piston inlet engine

P-0

2.650

R-4

2.770

N

3º 30'

B= Mainly used in 4-S & 2-S rotary and reedvalve engines

P-2

2.660

R-5

2.775

O

3º 45'

Carbslide opening

 1/8

 1/4

 3/8

 1/2

 3/4

vol

P

4º 00'

Cutaway

A

A

B

B

C

D

A

Most effective

Q

4º 15'

Pilot jet

A

A

B

C

D

D

B

Partly effective

R

4º 30'

Airscrew

A

A

B

C

D

D

C

Little influence

S

4º 45'

Needle Jet 

B

A

A

C

C

D

D

No influence

T

5º 00'

Needle

C

B

A

A

B

C

U

5º 15'

Needle position

B

B

A

A

B

D

V

5º 30'

Maninjet

D

D

C

C

B

A

W

5º 45'

Power Jet

D

D

D

D

C

A

X

6º 00'

Y

6º 15'

Z

6º 30'

4 Serie Needles for 26 spigot , and 22 & 24 flange carburettors.

Needle

X

Y

10

20

30

40

50

4D3

50.3

25.3

2.511

2.511

2.421

2.253

2.100

4D8

50.3

22.8

2.519

2.519

2.381

2.211

2.000

4E1

50.3

28.0

2.515

2.515

2.345

2.127

1.924

4DG6

50.3

24.0

2.518

2.518

2.405

2.119

1.850

4DH7

50.3

23.0

2.518

2.518

2.386

2.098

1.790

4F15

50.3

26.5

2.512

2.512

2.400

2.120

1.881

4J13

50.2

24.0

2.513

2.513

2.230

1.800

1.400

4L6

50.3

24.5

2.515

2.515

2.178

1.660

1.190

4F6

50.5

25.3

2.514

2.514

2.406

2.145

1.876

4L13

45.1

25.0

2.518

2.516

2.339

1.842

4F10

50.2

24.5

2.513

2.513

2.385

2.135

1.877

4J11

41.5

21.3

2.512

2.506

2.188

1.776

4P3

50.5

25.0

2.510

2.506

2.436

2.284

2.122

5 Series Needles 26-32 spigot , and 28-34 flange carburettors.

Needle

X

Y

10

20

30

40

50

60

5D6

59.3

27.5

2.515

2.515

2.460

2.290

2.120

5FJ9

59.2

35.0

2.517

2.517

2.517

2.364

2.021

5D120

59.1

28.2

2.520

2.520

2.479

2.311

1.980

5F3

58.0

27.4

2.519

2.519

2.419

2.135

1.863

5EH7

57.6

28.5

2.517

2.517

2.473

2.210

1.848

5E13

57.5

29.5

2.515

2.515

2.484

2.197

1.803

5EJ13

57.8

26.5

2.519

2.519

2.431

2.210

1.766

5DL13

60.2

32.0

2.515

2.515

2.515

2.362

1.922

1.463

5EJ11

60.3

28.5

2.515

2.515

2.515

2.241

1.839

1.420

5EL9

60.3

27.0

2.517

2.517

2.441

2.221

1.780

1.248

5FL11

60.3

28.2

2.518

2.518

2.438

2.175

1.740

1.256

5EP8

60.2

33.0

2.513

2.513

2.513

2.245

1.780

1.120

5FL14

58.0

28.0

2.520

2.520

2.440

2.170

1.735

5FL7

58.0

28.0

2.518

2.518

2.440

2.170

1.735

5DP7

57.6

26.4

2.512

2.512

2.440

2.259

1.580

5J6

58.0

27.5

2.518

2.518

2.340

1.890

1.450

5L1

58.0

27.0

2.518

2.518

2.330

1.811

1.297

5C4

55.1

24.0

2.516

2.516

2.448

2.310

2.179

5F18

58.0

27.0

2.521

2.521

2.515

2.257

2.006

5J9

58.0

27.0

2.522

2.520

1.432

1.996

1.505

5F12

51.5

23.3

2.021

2.021

1.882

1.631

1.375

5D120

53.5

27.6

2.510

2.510

2.496

2.338

2.169

5DP2

60.3

32.4

2.515

2.514

2.513

2.418

2.067

1.418

514

60.0

27.0

2.514

2.509

2.442

2.071

1.690

1.332

5D5

57.6

30.0

2.513

2.513

2.510

2.366

2.205

6 Series Needles 30-38 spigot carburettors

Needle

X

Y

Z

10

20

30

40

50

60

6H1

62.3

37.5

2.510

2.510

2.510

2.412

2.041

1.696

6DH2

62.3

28.0

2.511

2.511

2.466

2.295

2.000

1.660

6F9

62.3

28.9

2.516

2.516

2.475

2.210

1.949

1.678

6CF1

61.5

29.5

2.512

2.512

2.429

2.240

1.974

1.710

6FJ6

62.3

35.2

2.505

2.505

2.505

2.376

2.040

1.606

6DH3

62.3

22.0

2.512

2.512

2.458

2.286

1.948

1.607

6J3

62.3

36.7

2.515

2.515

2.515

2.359

1.912

1.456

6L1

62.3

37.0

2.512

2.512

2.512

2.335

1.826

1.313

6DP5

62.3

32.1

2.518

2.518

2.518

2.372

1.834

1.141

6N1

62.3

37.0

2.514

2.514

2.514

2.278

1.672

1.058

6DP1

62.3

28.9

2.511

2.511

2.476

2.312

1.748

1.075

6F3

60.5

34.2

2.512

2.512

2.512

2.313

2.000

6DH4

62.3

25.5

2.520

2.520

2.440

2.258

1.915

1.575

6J1

64.0

36.2

2.517

2.517

2.517

2.339

1.919

1.495

6DH7

62.2

28.5

2.516

2.516

2.505

2.316

2.009

1.688

6F5

62.3

38.1

19.0

2.515

2.456

2.454

2.364

2.098

1.840

6F4

62.3

32.0

19.4

2.515

2.442

2.436

2.206

1.939

1.678

6F8

62.3

34.0

21.5

2.512

2.512

2.386

2.214

1.945

1.688

6FJ11

62.3

36.0

18.7

2.519

2.481

2.481

2.367

2.030

1.610

6F16

59.1

36.7

18.5

2.519

2.489

2.489

2.372

2.104

6DH21

52.3

30.1

16.5

2.515

2.470

2.465

2.328

2.024

6F16

64.6

31.2

18.4

2.520

2.404

2.400

2.201

1.941

1.679

7 Series Needles 40-44 spigot carburettors

Needle

X

Y

10

20

30

40

50

60

70

7FO6

72.3

29.0

3.005

3.005

2.951

2.680

2.415

2.140

1.876

7H2

72.3

28.9

3.005

3.005

2.928

2.575

2.230

1.868

1.507

7J2

72.3

28.8

3.005

3.005

2.904

2.460

2.010

1.569

1.125

7F2

73.0

43.5

2.515

2.515

2.515

2.515

2.312

2.040

1.703

X = The total length of the needle

Y = The measurement from the top of the needle to where the taper starts

Z = The dimension in mm from the top of the needle to the pronounced taper point.

10-20 etc= The diameter of the needle measured from the top at 10 - 20 etc mm.