Mikuni Needle Jet Dims

OEM needle jets for Triples are not available from most suppliers. Based on the info below there are replacements available with provisions. The replacements require Large Hex main jets as the main jet threads differ between stock OEM and replacements. Suggested replacements are NOT tested in application and are "speculated" replacements. Sizing, O-2, O-6, etc., should remain the same as OEM.

H2 replacement - 169 series
H1 replacement - 169/182 series
S series replacement - none known

Note: Main Jets have different threads and are not all interchangeable. Needle jets are threaded for specific main jet types. Main jet size numbers do not all yield the same flow for different style jets, ie, #100 Large Round Reverse has different flow than #100 Large Hex. See chart below.

145 series = VM4/042 main
159 series = VM4/042 main     166 series = VM4/042 main
169 series = VM4/042 main     171 series = N100.604 main
172 series = N100.604 main     175 series = VM4/042 main
182 series = VM4/042 main     194 series = N100.604 main
220 series = N100.604 main     224 series = VM4/042 main
239 series = VM4/042 main     257 series = VM4/042 main
332 series = VM4/042 main     864 series = VM4/042 main

MIKUNI N100.604 - Large Round - Reverse OVERALL LENGTH = 9mm HEAD DIAMETER = 8mm THREAD DIAMETER = 4.9mm THREAD PITCH = 5.0 x 0.75		MIKUNI 4/042 - Large Hex OVERALL LENGTH = 11.5mm HEAD DIAMETER = 6mm HEAD LENGTH = 6.3mm THREAD DIAMETER = 5.2mm THREAD PITCH = 5.25 x 0.9
MIKUNI VM11-22 - Large Round OVERALL LENGTH = 10.5mm HEAD DIAMETER = 8mm THREAD DIAMETER = 5.9mm THREAD PITCH = 6.0 x 0.75mm		MIKUNI M10-14 - Small Hex OVERALL LENGTH = 8mm HEAD DIAMETER = 6mm HEAD LENGTH = 3mm THREAD DIAMETER = 5.2mm THREAD PITCH = 5.25 x 0.9
MIKUNI N102.221 - Small Round OVERALL LENGTH = 9mm HEAD DIAMETER = 6mm THREAD DIAMETER = 4.9mm THREAD PITCH = 5.0 x 0.75

MIKUNI VM22/210 OVERALL LENGTH = 13.5 mm THREAD DIAMETER = 4.9 mm THREAD PITCH = 5.0 x 0.8 8 bleed holes		MIKUNI N151.067 OVERALL LENGTH = 14 mm THREAD DIAMETER = 4.9 mm THREAD PITCH = 5.0 x 0.8 no bleed holes
MIKUNI BS30/96 OVERALL LENGTH = 14 mm THREAD DIAMETER = 4.9 mm THREAD PITCH = 5.0 x 0.8 6 bleed holes

Main Jet Interchange Chart

N100/604 Lg Round (Reverse)	4/042 Lg Hex (Amal)
90	95
92.5	100
95	105
97.5	110
100	115
102.5	120
105	125
107.5	135
110	140
112.5	145
115	155
117.5	165
120	170
122.5	175
125	185
127.5	195
130	200