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We have gathered the information below from the Mikuni product catalog. If the needle part number is blue, you can go directly to the product page by clicking it. If the needle part number has an asterisk next to it, that means it has been discontinued by Mikuni and will not longer be available. The charts below do not reflect the full offering of Mikuni needles. There are many others available. These are only what we are able to show dimensions for. If you know the part number of the needle, your best bet is to search for it in the main search box at the top of the site. Many needles are visible by search only.
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The jet needle controls the fuel mixture in the mid range throttle position which is approximately 1/4 to 3/4 throttle opening. The taper of the needle determines the amount of fuel. For example: the thinner the diameter of the needle, the more fuel will be drawn through the needle jet. The thicker the diameter of the needle, the less fuel will be drawn due to less available area for fuel to flow.
NEEDLE TAPER DIAMETER DIMENSION CHARTS BY SERIES
D-1 through D-5 indicates diameter (mm) at each point.
|
A |
B |
D-1 |
D-2 |
D-3 |
D-4 |
D-5 |
| 4E1* |
50.3 |
28.0 |
2.515 |
2.515 |
2.345 |
2.127 |
1.924 |
| 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 |
| 4J11 |
41.5 |
21.3 |
2.512 |
2.506 |
2.188 |
1.776 |
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D-1 through D-6 indicates diameter (mm) at each point.
|
A |
B |
D-1 |
D-2 |
D-3 |
D-4 |
D-5 |
D-6 |
| 5F3 |
58.0 |
27.4 |
2.519 |
2.519 |
2.419 |
2.135 |
1.863 |
|
| 5EJ11* |
60.3 |
28.5 |
2.515 |
2.515 |
2.515 |
2.241 |
1.839 |
1.420 |
| 5FL11* |
60.3 |
28.2 |
2.518 |
2.518 |
2.438 |
2.175 |
1.740 |
1.256 |
| 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 |
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 |
|
| 5J9* |
58.0 |
27.0 |
2.522 |
2.520 |
1.432 |
1.996 |
1.505 |
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D-1 through D-6 indicates diameter (mm) at each point.
|
A |
B |
D-1 |
D-2 |
D-3 |
D-4 |
D-5 |
D-6 |
| 6F5 |
62.3 |
38.1 |
2.515 |
2.456 |
2.454 |
2.364 |
2.098 |
1.840 |
| 6F4 |
62.3 |
32.0 |
2.515 |
2.442 |
2.436 |
2.206 |
1.939 |
1.678 |
| 6F8 |
62.3 |
34.0 |
2.512 |
2.512 |
2.386 |
2.214 |
1.945 |
1.688 |
| 6F16 |
64.6 |
31.2 |
2.520 |
2.404 |
2.400 |
2.201 |
1.941 |
1.679 |
| 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 |
| 6L1 |
62.3 |
37.0 |
2.512 |
2.512 |
2.512 |
2.35 |
1.826 |
1.313 |
| 6DP17 |
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 |
38.9 |
2.511 |
2.511 |
2.476 |
2.312 |
1.748 |
1.075 |
| 6DH4 |
62.3 |
35.5 |
2.520 |
2.520 |
2.440 |
2.258 |
1.915 |
1.575 |
| 6DH7 |
62.2 |
38.5 |
2.516 |
2.516 |
2.505 |
2.316 |
2.009 |
1.688 |
| 6DH8 |
62.2 |
20.3 |
2.538 |
2.538 |
2.436 |
2.208 |
1.827 |
1.497 |
| 6FL14 |
62.1 |
26.7 |
2.538 |
2.538 |
2.538 |
2.233 |
1.649 |
1.218 |
| 6F15 |
62.2 |
19.8 |
2.535 |
2.538 |
2.461 |
2.208 |
1.979 |
1.649 |
| .6DP10* |
62.4 |
26.5 |
2.510 |
2.510 |
2.440 |
2.260 |
1.560 |
0.890 |
| 6F13 |
64.2 |
32.8 |
2.500 |
2.460 |
2.460 |
2.240 |
1.970 |
1.70 |
| 6DJ30 |
64.7 |
26.3 |
5.510 |
2.510 |
2.450 |
2.090 |
1.660 |
1.24 |
An asterisk next to the part number indicates the needle has been discontinued
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| SERIES TYPE |
APPLICATION |
| #4 Series |
All 18mm carburetors along with 22mm and 24mm flange type |
| #5 Series |
26mm-32mm Spigot - 28mm-34mm Flange |
| #6 Series |
30mm-38mm Spigot |
| #7 Series |
40mm and 44mm Spigot |
| #8 Series |
HSR 42/45 |
| #9 Series |
RS and HS |
D-1 through D-6 indicates diameter (mm) at each point.
|
A |
B |
D-1 |
D-2 |
D-3 |
D-4 |
D-5 |
D-6 |
D-7 |
| 7DH5 |
72.2 |
27.4 |
2.98 |
2.98 |
2.94 |
2.78 |
2.44 |
2.08 |
1.72 |
| 7F7 |
72.3 |
33.1 |
2.99 |
2.99 |
2.99 |
2.80 |
2.54 |
2.28 |
2.02 |
| 7F6 |
72.3 |
29.0 |
3.00 |
3.00 |
2.95 |
2.68 |
2.41 |
2.14 |
1.87 |
| 7DH3 |
72.5 |
28.1 |
2.98 |
2.98 |
2.96 |
2.80 |
2.47 |
2.11 |
1.76 |
| 7DH2 |
75.3 |
31.6 |
2.99 |
2.99 |
2.99 |
2.84 |
2.66 |
2.27 |
1.92 |
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