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Yoshimura Mikuni TMR-MJN 24 /MJN26 for Yamaha Spark Z135

traxxas-modifier

traxxas-modifier

Super LOLO
Staff member
Guys check this out.
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Yoshimura Mikuni TMR-MJN 24 /MJN 26 for Yamaha Spark 135
Mikuni Carburetor Tuned By Yoshimura with Yoshimura Mutiple Jet Nozzle Technology (MJN) . Innovation allows the Injection technology on your Carburetor. *** Aluminium Funnel Sold Separately

YOSHIMURA-MIKUNI TMR-MJN

MJN Carburetor / Theory is simple!

The reasons are as follows;

1) MJN system can atomize fuel much better than ordinary solid type needles.
2) It is because MJN nozzle controls the amount of fuel in proportion to the throttle opening (the air), by numbers of accurately drilled small holes.
3) Better atomized fuel gives better throttle response as well as better fuel efficiencies.
4) Also, MJN system can supply the fuel through the MJN nozzle which locates at the center of the bore where air speed is the fastest. This also atomizes fuel even better! Another very important theory of MJN system is when the throttle is shut off for engine braking, very minimal amount of fuel is guided into the intake ports. Therefore remarkable recovering acceleration can be obtained.

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wow!!!
specifically tuned for our bike.
The price? USD$361.082 :)


update:
Heres a video of Yoshi TMMJN (Multiple Jet Nozzle) at work.
[flash width=425 height=344]http://www.youtube.com/v/APq5jz4T_08&hl=en&fs=1[/flash]


Heres video intro of Yoshimura TM-MJN 26mm racing carb
[flash width=425 height=344]http://www.youtube.com/v/8eKql0A-c0k&hl=en&fs=1[/flash]
 

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R

rooster

Super Veteran
warrrgh didnt see dat it costs 3k bucks...wakakakka....
it'll make me suddenly poor..ahahahaha...
i like da color though...looks like one mean carb :D
 
J

justkir

Super Veteran
where do u get this info? yoshimura website said that the carburetor is for Honda not Yamaha...explain?
 
S

stroker

Veteran
Its designed for small cc four stroke bikes. Its just a generic carb that chad been modified so that it can be used on all types of small cc four strokers...

For the price, no thanks.. haha. And its only a 24mm carb. A pwk28 or even the pe28 will be a better choice anyday, anytime. IMHO.

Cheers!~
 
traxxas-modifier

traxxas-modifier

Super LOLO
Staff member
great stroker..

for me what makes me interested on this card are the ff

-original yoshimura carb (very respected on aftermarket parts)
-it has special jet nozzle which provides more power AND fuel efficient.
-its color black and unique :)

yes you can get more bigger carb, and you will get more power
but how about the fuel consumption (also big)?

what do you think?
 
J

justkir

Super Veteran
yeah...but the price way too expensive for me...

with that amount of money... its alot that we can do for a married man...muahaha
 
traxxas-modifier

traxxas-modifier

Super LOLO
Staff member
rudduan said:
why good thing always come with damn high price....????
Click to expand...
too bad ruduan, thats something we have to accept :(

if i have extra money ill buy this carb.
i think its a equivalent of EFI only its tunable unlike EFI...
 
traxxas-modifier

traxxas-modifier

Super LOLO
Staff member
From yoshimura japan:
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The TMR-MJN/FCR-MJN carburetor was developed the multiple exhaust nozzle which was developed reed unevenness individually in the respective carburetor (MJN) with the carburetor which is installed, aiming toward the ideal atomization quality in order to obtain the formation and satisfactory fuel state of the mixture of proper density.

The technology has raised severely by the racing field which power and the response is pursued.
” MJN” with abbreviation of the multiple exhaust nozzle, the fact that the nozzle where several minute holes are opened to the pipe of air in place of the former exhaust nozzle is used is feature.

The gasoline which is emitted from the hole of this exhaust nozzle in addition to becoming the fog condition which is easy to evaporate, controlled the quantity of gasoline at the number of holes which appear and disappear attendant upon opening and closing the throttle valve by size of the hole and the fact that interval is changed made the revision every of throttle opening easy.
 

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traxxas-modifier

traxxas-modifier

Super LOLO
Staff member
From yoshimura japan:
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In case of needle type, as for the fuel which passed by the main jet, from the needle jet which is venturi bore lower part and the opening which can be made between the jet needles it is sucked out. In case of MJN, the fuel passes through the multiple nozzle of air, is sucked out from the plural holes which were bored through the nozzle.

The aforementioned way, the fuel is sucked out by vacuum. If and sucking out kiss of the fuel flux of the air which flows closely is fast, fast extent high vacuum is applied, it is possible to actualize the atomization of the fuel which is closer to ideal.

When the fluid (such as vapor and liquid) inside the tube and grooved it flows, about the part which is close to the inner wall of the tube and the groove viscous with resistance flux becomes slow. So, the place where flux is fastest? If with you say, around surrounding, it becomes about it is most distant from the wall respectively. Namely, it is the center of the bore. (FIG.1 reference)

The arrival eye spot of the invention of MJN was in this part. Ideal atomization is actualized, it is to have the necessity which has the sucking out mouth of the fuel in the center of the bore. And end of the research, it is to make that shape of the multiple exhaust nozzle is born, sends the grain of the delicate fuel evenly in the bore possible. And as for the delicate fuel grain, it is to be possible to actualize the various effects.

When travelling, difference at time of accelerator opening and closing
　Needle type with the sucking out mouth of one place, does the supply of the fuel for all accelerator openings. It sucks out and with the top and bottom of that needle-shaped jet needle the opening of the mouth changes, the emission quantity of the fuel changes.

　On the one hand, as for MJN the minute hole which was bored through multiple nozzle side responding to accelerator opening, it exposes digitally inside venturi, the fuel is sucked out from there.

　For example, we assume that the accelerator was opened suddenly largely. In case of needle type, it sucks out suddenly and the opening of the mouth becomes large. With the difference of fuel specific gravity the air and, until it stabilizes, the fuel of the large grain blows out from there, is connected to the occurrence of the condition such as trick and the breath being attached of the response. In addition, when while it is the liquid in the inhalation port it flows into, there is a fuel grain of this large grain, pulls up the temporary plug photographic fog and it means to designate future condition as bigger ones.

　In case of MJN, because it is the hole where originally the sucking out mouth of the fuel respectively is minute it corresponds to the vacuum where the engine occurs the fuel of the large grain emitting without, instantaneously, guarantees the good response. (FIG.2 reference)

　We assume that conversely, the engine brake was used for example with the accelerator as a full opening. In case of needle type, the fuel is sucked out by the vacuum where clearance of the needle jet and the jet needle is wide, is strong. This as for the fuel which is sucked out, as for decrease of fuel economy the plug photographic fog is pulled up of course, influence is left vis-a-vis the next acceleration state.

　As for MJN type, because the fuel which starts leaking from the nozzle is very little, the response can be good, move to acceleration state smoothly.

The advantage the minute fuel grain of MJN bringing
Improvement of output
Atomization state being ideal, you urge the complete combustion of the fuel and can improve the efficiency of the engine. Of course, it was installed even in the super motorcycle of the reed unevenness team which participates in the past all the Japanese championships.

In addition, it is sold from the sea bass corporation, MJN is formally adopted by also the carburetor setting part which is sold as GSX-R750W and the 96GSX-R750 part and the predominance is recognized.
Improvement of response
The aforementioned way, vis-a-vis the accelerator the response becomes very good, throttle operation easy regardless of the type of marketing car and racing machine which is tuned high-level, to ride becomes the machine which can be concentrated on riding easily.
Easy setting
The scope of supply of setting becomes wide, necessity of the re-setting for the change of atmospheric pressure and the like decreases. In addition, because structure itself changes, score of the setting part decreases in comparison with needle system.

It is easy to environment
Unless inevitably the fuel is made dense in order to supply the part which as for the engine of the big bore because also the combustion chamber is large, unevenness of the mixture is easy to occur, is thin it was not possible to make output raise. It makes the minute fuel grain, difficult and to make the unevenness because the fuel above necessity is not supplied, it is connected to result good fuel economy.

And, it is used by encounter even with the race/lace which rivals HONDA economical power and low the fuel economy which is represented in the my ledge marathon by the team “Zahnrad” of the Aoyama Gakuin University, has supplied synthesis victory and numerous Yosinari weaving/grade. In addition, CO in the exhaust (carbon monoxide) and HC (the hydrocarbon) it decreases MJN which urges the complete combustion of the fuel, designates the exhaust as clean ones.
 

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