Mikuni
pilot jets
bs30/96
151067
vm28/486
pilot air jets
n100.606
n102221
needle jets / OEM(!) CV emulsion tubes
all emu tubes
are Factory Pro exclusives
main jets
n102221 (small round
slotted),
n100604 (large round
slotted),
n208099 (those weird
Duc/TDM,yzf750 jets),
N4/042 "Mikuni "Hex" jets
main air jets: n100.606 and n102221
power jets: n100604
| Mikuni Pilot Jets | ||||
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Mikuni BS30/96 series |
"the short ones with holes" - | ||
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Mikuni 151067 |
Commonly called: "The 30/96 pilots without the holes." | Duc's, Yamaha's and lots of others | |
| Mikuni 210 Series |
"These pilots are measured on a different scale" | Used in: old 2 stroke apps and an ancient, few 4 strokes |
Don't interchange with the 30/96 or 151067's! The size scaling is different. | |
| Mikuni VM28/486-xx |
long style | |||
| Mikuni 151067 |
long and similar to VM28/486 | |||
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Mikuni Air Jets / also used as "Power Jets |
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| 5mm thread | ||||
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N100.606-xx | 4mm thread | When you need a 4mm thread, small
diameter headed air or fuel jet - this is the usual jet of choice.
Air jets in most carbs and the power jets in TZ250 carbs and 90-92 gsxr750's with 38mm carbs |
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Mikuni emulsion tubes / needle jets
tech
reference:
Identify emulsion tubes and needle jets, Mikuni
Identify Yamaha Virago emulsion tubes and needle jets
Identify Honda VTR1000 emulsion tube / needle jet front and rear
| Mikuni "Emulsion" Tubes | |||
This is enough wear to cause problems. |
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| Top
Left side - This is a picture of the needle jet
area of an emulsion tube from a stock 38mm CV
Mikuni carb as installed on Ducati, Yamaha TDM/TRX 850, YZF750,
FZR1000, etc.. It has approximately ~5000 miles or 8000k usage on a Ducati or TDM 850 - WITH A STOCK Aluminum NEEDLE. Notice that the center hole is noticeably worn at the "V", the 12 o'clock position, which would be towards the engine, as installed in the carburetor. This causes 2 conditions. First, it allows more fuel to enter the carburetor, as in using a needle with a small base diameter AND the fuel that enters the carb - it enters in larger droplets, resulting in poor combustion. We carefully check needle jet condition on the vehicles when we create and install carb recalibration kits. If you install a kit and it is much too rich at low rpm, and lowering the fuel level 1mm doesn't fix it, check the needle jets for any wear - it's not uncommon. Additional: Eventually, in the 36mm horizontal mount and 38mm downdraft Mik's, the carb body plastic insert, where it holds and guides the slide from rattling back and forth, will wear out - allowing the slide to rattle and bang the needle fore and aft in the needle jet orifice - causing accelerated NJ wear. This wear is biased towards the lowered slide position - as in idle and low rpm areas - as in "in-town", "stop and go" driving. The gist of that is that you may only get 5,000 miles out of your needle jets in your VL / VS bike that you use for cruising 4th Street and hanging out at McDonalds - but your long distance , highway cruising buddy might get 25,000 miles before mileage deteriorates to 25mpg or worse. I haven't heard of anybody who has got the "60,000 miles" that some Tech Bulletin claims is normal with a stock needle...... I WILL change this if I ever find that person who made it to 60,000 miles on his/her VS / VL and has the original needle jets/emulsion tubes. In fact - I'll GIVE any carb needle jet rebuild to any VL 1500 owner who makes it to 60,000 miles on the original needle jets! Marc Slide Guide Wear: Example: The original needle jet lasted 5,000 miles in your usage. After replacing the worn emulsion tube / needle jet, they only lasted 3,000 miles or less. That's because the slide guide slot in the carb body is worn - not because of the emulsion tube or needle is bad. Even Suzuki knows that - even though their highly optimistic estimate of 60,000 mile life with a stock needle is based on perhaps a VL1500 or VS1400 run at high speed on a highway. A "step" inside of the needle seat in the
carb slide? Be famous!
(for something besides "that"!) US=USA |
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Factory produces stock replacement needle jets / emulsion tubes for Mikuni carburetors These Factory Pro Design "Mikuni style" needle jets are threaded for Genuine Mikuni or Factory Pro "M221 Series" main jets, but not dynojet. |
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Aprilia |
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Pegaso 650 36mm CV ~2.5mm Ø |
Factory Pro nickel plated replacements in stock |
CRZ-EMU-100102k $48 / 2pcs |
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Ducati |
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Ducati
M600, M750, M900 ~3.00mm Ø |
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Factory Pro nickel plated replacements in stock |
CRZ-EMU-100120k (now nickel plated!) $48 / 2pcs |
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Suzuki |
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Suzuki
gsf 1200 "Bandit" 96-00 replaces pn: 09494-00898 (O-8m) 36mm CV ~2.5mm Ø |
Factory Pro nickel plated replacements in stock |
CRZ-EMU-100102k $96 / 4pcs |
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Suzuki
gsxr11000, 89-98 36mm CV ~2.5mm Ø(.0985-.0990) |
Factory Pro nickel plated replacements in stock | CRZ-EMU-100102k $96 / 4pcs |
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Suzuki gsxr600, 92-93 only 36mm CV
~3.00mm Ø |
Factory Pro nickel plated replacements in stock | CRZ-EMU-1001023-(1210) | |
| Suzuki
SV650 |
Send in for
repair / rebuild click here |
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Suzuki gsx750, Katana 89-97 36mm CV
~3.00mm Ø |
Factory Pro nickel plated replacements in stock | CRZ-EMU-1001023-(1220) | |
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Suzuki gsxr750, 88-89 ~3.00mm Ø (.1175 kit) |
Factory Pro nickel plated replacements in stock | CRZ-EMU-1001023-(1220) | |
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Suzuki gsxr750, 88-92 ~3.00mm Ø (.1175 kit) |
Factory Pro nickel plated replacements in stock | CRZ-EMU-1001023-(1220) | |
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Suzuki gsxr750, 93-95 ~2.5mm Ø (.0985-.0990) |
Factory Pro nickel plated replacements in stock | CRZ-EMU-100102k $96 / 4pcs |
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| Suzuki, rf600,
94-96 Suzuki, rf900, 94-97 yes, Suzuki used essentially the same part in both size carbs.... Suz pn:
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Factory Pro nickel plated replacements in stock |
CRZ-EMU-100195k $96 / 4pcs |
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Triumph |
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Triumph 900 3 cylinder, 36mm CV Mikuni carbs
~2.5mm Ø |
Factory Pro nickel plated replacements in stock | CRZ-EMU-100102k 3pcs |
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Triumph 1200 4 cylinder, 36mm CV Mikuni carbs
~2.5mm Ø |
Factory Pro nickel plated replacements in stock |
CRZ-EMU-100102 $96 / 4pcs |
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Yamaha |
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Yamaha
fzr400 (discontinued by Yamaha - still available from Factory Pro, as of November, 06) |
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Factory Pro nickel plated replacements in stock | CRZ-EMU-100105k $96 / 4pcs |
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Yamaha
fzr600, 89-99 USA (yam pn: 3EN-14141-90-00) |
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Factory Pro nickel plated replacements in stock | CRZ-EMU-100160k $96 / 4pcs |
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Yamaha (does NOT fit 90-92ish gsxr750 horizontally mounted carbs - email for those) 38mm CV ~3.00mm Ø (.1175 kit) |
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Factory Pro
nickel plated replacements in stock In the original carbs, there are tiny differences in the "size", but, if you know what I'm talking about, a Y-2 and a Y-4 are the equiv. of <1/3mm difference in float height (translate to "insignificant"). |
CRZ-EMU-100120k $96 / 4pcs |
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Yamaha Yam pn: 3GM-14141-94-00 (does
NOT fit 90-92ish gsxr750 horizontally mounted carbs -
email for those) |
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Factory Pro nickel plated replacements in stock
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CRZ-EMU-100120k $96 / 4pcs |
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Yamaha replaces Yam pn: 3GM-14141-94-00 Also same part used in Ducati 600, 750 and 900cc bikes. Fits every original Mikuni 38mm downdraft CV carb.
(does NOT fit 90-92ish gsxr750 horizontally mounted carbs -
email for those) |
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Factory Pro nickel plated replacements in stock
In the original carbs, there are tiny differences in the "size",
but, if you know what I'm talking about, a Y-2 and a Y-4 are the
equiv. of <1/3mm difference in float height (translate to
"insignificant"). |
CRZ-EMU-100120k $48 / 2pcs |
| Yamaha fj1100, 84-85
84 Yam pn: 16H-14141-90-00 |
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Factory Pro nickel plated replacements in stock |
CRZ-EMU-100112k $96 / 4pcs |
| Yamaha fj1200, 89-93 Yam pn: 50H-14941-92-00 |
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Factory Pro nickel plated replacements in stock |
CRZ-EMU-100112k $96 / 4pcs |
needles
| Keihin FCR Flatslide needles |
FCR and Smoothbores only | I got really tired of trying
to use the original Keihin numbering / profile codes, so I made my own. Very nice if you have everything perfect at every throttle position except for 1/4 and only want to change that 1 thing! Flatslides are super easy to tune on the EC997 dynos and not easy on anything else for many different reasons. |
needle clips
needle shims
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patented High Dispersal Jet System HDJ available for licensing Easily retrofitable in many OEM Keihin, Mikuni and aftermarket carbs and simple to make minor modifications in manufacturing process to incorporate. Significantly better fuel atomization, runs without misfire at leaner fuel delivery rates, better power from the same amount of fuel, more consistent, smooth running, as verified on EC997 Low Inertia dyne FLUX value engine smoothness testing. I can explain that if you are not using that dyne system and cannot get that data. All what an MJN promised, but it can run cleanly at all rpms and, because it still used a tapered needle, is easy to tune properly. |
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Mikuni Main Jets |
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N102221 | Commonly known as: "Small, round, slotted" Looks a lot like a Keihin 393 series jet, but the threads are slightly different |
Used in original equipment CV carbs on some Kawasaki, some Yamaha, Mikuni equipped Triumph | |
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N100604 | Commonly known as: "Large, round, slotted" |
Used in original equipment CV carbs on some Kawasaki, some Yamaha, Mikuni equipped Triumph | |
| N208099 | Commonly known as: "Those weird push-in jets that I can't find" |
Used in Ducati 600, 750, 900
w/ Mikuni's and TDM/TRX 850. Used in YZF750 in some countries, in some years. USA always used these jets in the yzf750. |
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Mikuni Hex Mains N04042 |
5mm thread diameter 6mm hex width |
many offroad / dirt, TZ250, all to at least 02 | |
main and
pilot air jets / power jets
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Mikuni Power Jets |
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N100.606-xx | Commonly called "What's a power jet?" | used in: TZ250, all to at least 02 gsxr750,90-92,all with 38 Mikuni carbs |
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carb tools
Mikuni Needle Jets / Emulsion Tubes
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