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