Keihin PWK carburetor circuits

Keihin PWK carburetor circuits


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    These tuning components are the original Keihin parts and part numbers. They should interchange with the JCR (and possibly bgm, KOSO & OKO replicas as well).

PWK Slides

Size

Part No.

C. A. (mm)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

28 mm

N502-52x00
slide mark

A
-

 

B
1

 

C
2

 

D
3

H
3.5

E
4

 

F
5

 

G

 

 

 

 

 

 

 

33 mm
35 mm*

N502-15x02
slide mark

A
-

 

 

 

 

 

 

B
3

 

C
4

J
4.5

D
5

K
5.5

E
6

L
6.5

F
7

 

G
8

 

H
9

* Note: the PWK 35 mm slide part number has been changed. The previous part #N502-16x00 is now N502-15X62, which has been combined with PWK 33 mm.

Size

Part No.

C. A. (mm)

0.0

3.6

4.6

5.6

6.6

7.6

8.6

9.6

6.1

7.1

8.1

36 mm
38 mm
39 mm

N502-17x02
slide mark

A
-

B
3

C
4

D
5

E
6

F
7

G
8

H
9

J
55

K
65

L
75

PWK Needles

Click the needle drawing for a larger view
Note: Number 1 clip position is furthest from needle taper.
The number after the three digits is clip position.

Mark

Taper: A

L1

Diameter: d1

28-33mm
Needles

Taper

A

74.20

2.605

Leaner .75°

Standard 1.00°

Richer 1.25°

B

74.65

2.615

C

75.10

2.625

4 Clip positions leaner

N / A

EMR-1

FHR-2

D

0° 45"

75.55

2.635

E

1° 0"

76.00

2.645

2 Clip positions Leaner

DTR-1

EMR-3

FHR-4
FBR-1

F

1° 15"

76.45

2.655

G

1° 30"

76.90

2.665

Standard

DTR-3

EMR-5
EFR-2

FHR-6
FBR-3

H

1° 45"

77.35

2.675

J

2° 00"

77.80

2.685

2 Clip position Richer

DTR-5
DMR-2

EMR-7
EFR-4

FBR-5

K

2° 15"

78.25

2.695

L

2° 30"

78.70

2.705

4 clip positions Richer

DTR-7
DMR-4
DFR-1

EFR-6
EBR-4

FBR-7

M

2° 45"

79.15

2.715

N

3° 00"

79.60

2.725

P

3° 15"

80.05

2.735

6 Clip position Richer

DMR-6
DFR-3

EBR-6

N / A

Q

3° 30"

80.50

2.745

R

3° 45"

80.95

2.755

S

4° 00"

81.40

2.765

T

4° 15"

81.85

2.775

U

4° 30"

82.30

2.785

Straight Diameter

M (2.715mm)

V

4° 45"

82.75

2.795

P (2.735mm)

W

5° 00"

83.20

2.805

R (2.755mm)

X

83.65

2.815

T (2.775mm)

Y

84.10

2.825

V (2.795mm)

Z

84.55

2835

Mark

Taper: A

L1

Diameter: d1

35-39mm
Needles

Taper

A

1° 00"

58.25

2.605

Leaner .75°

Standard 1.00°

Richer 1.25°

B

58.70

2.615

C

59.15

2.625

4 Clip positions leaner

N / A

FTR-1

GTR-3

D

0° 45"

59.60

2.635

2 Clip positions Leaner

N / A

FTR-3

GTR-5
GKR-1

E

1° 0"

60.05

2.645

F

1° 15"

60.50

2.655

Standard

ETR-2

FTR-5
FKR-1

GTR-7
GKR-3

G

1° 30"

60.95

2.665

H

1° 45"

61.40

2.675

2 Clip position Richer

ETR-4

FTR-7
FKR-3

GKR-5
GBR-1

J

2° 00"

61.85

2.685

K

2° 15"

62.30

2.695

4 Clip position Richer

ETR-6
EKR-2

FKR-5
FBR-1

GKR-7
GBR-3

L

2° 30"

62.75

2.705

M

2° 45"

63.20

2.715

6 clip positions Richer

EKR-4

FKR-7
FBR-3

GBR-5

N

3° 00"

63.65

2.725

P

3° 15"

64.10

2.735

8 Clip position Richer

EKR-6
EBR-2

FBR-5

GBR-7

Q

3° 30"

64.55

2.745

R

3° 45"

65.00

2.755

10 Clip position Richer

EBR-4

FBR-7

N / A

S

4° 00"

65.45

2.765

T

4° 15"

65.90

2.775

U

4° 30"

66.35

2.785

Straight Diameter

M (2.715mm)

V

4° 45"

66.80

2.795

P (2.735mm)

W

5° 00"

67.25

2.805

R (2.755mm)

X

67.70

2.815

T (2.775mm)

Y

68.15

2.825

V (2.795mm)

Z

68.60

2835

What’s related?

JRC carburetor
bgm, OKO & KOSO replicas
Concentric tuning
Monobloc tuning
Mikuni VM tuning
Triumph Performance

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