Keihin
(216)524-1599
Carburetor Tuning

Jet Needle Changes for  FCR Needles

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Specification Table for Keihin PJ 34-38, PWK33-39

OEM-N427-48XXX Series Conversion Chart

1. How To Read Marks

1) Mark on OEM Jet Needle [6 digits]

 

2. Conversion Table

1) Taper 2) Diameter 3) L1
OEM Option OEM Option OEM Option OEM Option
11 B 60 A 72 N A A
13 C 61 B 73 P B B
14 D 62 C 74 Q E C
20 E 63 D 75 R F D
22 F 64 E 76 S J E
30 J 65 F 77 T K F
66 G 78 U N G
67 H 79 V P H
68 J 80 W S J
69 K 81 X T K
70 L 82 Y W L
71 M 83 Z Y M

 

3. Examples for Conversion

OEM    NEEDLE
R 1 1 6 6 J
R 1 3 6 8 N
R 1 4 7 0 N
R 2 0 7 2 N
OPTION
B E G
C G J
D G L
E G N

The MARK ORDER of OEM needle is NOT the same as OPTION's. DO NOT FORGET IT.

N84x, N85x Jet Needle to N428-48xxx

OEM MARK OPTION MARK OEM MARK OPTION MARK
N84A CFF N84I CFP
N84B CFG N84J CFQ
N84C CFH N84K CFR
N84D CFJ N85A CCF
N84E CFK N85B CCG
N84F CFL N85C CCH
N84G CFM N85D CCJ
N84H CFN N85E CCK

NOTE: N84x series are dual taper, N85x series are triple taper, therefore this chart will only give approximate comparison. Change main jet to two sizes larger with N428-48 series for N85 series.

 

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