Genuine Mikuni Needles

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.

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

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

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

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