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Discussion Starter #1 (Edited)
I have a ninja 2008 250r swapped with a 2005 ex500 motor .
the 250 frame cannot utilize the ex500 airbox so I have to find an alternative.

I have stock carbs running with the UNI pod filters... right now I have the option to go forward with a jet kit I found and the company said that they can build a kit specifically for me and have it sent out and run it with the stock carbs... I'm going out of country the end of this week what do you think?

so for everyone out there running carbs on their ex500 what brand? model? jets? needles?

Please leave a comment of your setup and how it works for you ! thank you !>:)
 

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OK, I have to say this. The way you did the title of this thread appears inflammatory. It looks like a poke in the eye to all those who advise not to run pods with CV carburetors.

Please change it so that at least it's not screaming out in CAPS.
 

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I think you will find most of the comments state that it is not worth the effort to use a jet kit on this type of engine, and to make the change before heading out on a long ride is also asking for a long pause on the side of the road.
 

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Discussion Starter #4
OK, I have to say this. The way you did the title of this thread appears inflammatory. It looks like a poke in the eye to all those who advise not to run pods with CV carburetors.

Please change it so that at least it's not screaming out in CAPS.
I low key know this but I High key want to poke those people in the eyes so they can get up on this thread negative or positive :wink2:
 

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Discussion Starter #5 (Edited)
I think you will find most of the comments state that it is not worth the effort to use a jet kit on this type of engine, and to make the change before heading out on a long ride is also asking for a long pause on the side of the road.
The whole swap I did it myself and the bike is now sitting at a friends shop he is cleaning my carbs as we speak, I already ordered the jet kit so he can do a test run while I'm out of country. it is snowing heavily here so there is no chance in riding just getting the bike ready for the season.

any opinion/advice I get on here will be directed to him.
 

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I low key know this but I High key want to poke those people in the eyes so they can get up on this thread negative or positive :wink2:
Creating conflict for the sake of creating conflict? Are you familiar with the old "ban hammer"? :wink2:
 

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ok guys let's step back a little. yes the OP could have phrased the heading better and being specific with a question is not a bad idea.
however dismissing a question that may be a potentially important modification [to some] that could have the capability to increase the knowledge base of the forum future members may not be the best way to do it.
it is how it has been done before without any concrete conclusion other than it's not a good idea.
but now we have a couple of good well informed mods who are quite capable of keeping on top of the situations as they arise.

I understand the OP's motives in phrasing the question a certain way. this is to cut down on the furore usually associated with this issue. wanting really only relevant posts from members who do or have run pods on these bikes or these engines fitted to other types of bikes/vehicles they have been a few in the past. so where are they now and what happened in the end.

the problems associated with these carbs and changing to pods/modified boxes is well documented elsewhere and doesn't really help the issue in hand. other bike forums are quite open to this topic it surprises me why we are sometimes so closed to the idea that it may just work somehow, it may at times seem like one is chasing the holy grail but nothing is impossible.

ps, I hope members will contribute to this thread with fixes and solutions it could be useful.

thanks for reading yorkie.
 

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Sorry, but his intention was not to prevent furor, but to provoke people. He said so himself. Also, I asked him to take it out of CAPS at least. He has declined to do so.

I'm all for free discussion, but I have a problem when the OP tries to provoke other members, then purposely ignores my request to tone it down. He's got 10 posts and already been threatened with a ban hammer. As far as I'm concerned the situation has already arisen. While I go about changing what I asked him to do voluntarily I'll be considering whether I should just shut this down right now.
 

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I agree it does seem that way and of course that is your right as a mod. however it would be a shame if yet another pod thread goes the same way as all the others before it has even started.

I only wrote the above to try and calm things down a bit. I have no intention of hijacking anyone's thread in anyway or adding to a existing perceived conflict. but the issues above all that could be important to someone, it needs to be discussed if not here then somewhere.
I have been in this pod process now for two years with some success and a lot of failures hell I could write a book on it. but not on someone's thread regarding other issues, if I'm asked a question I will answer it. or at least try to advise that is as far as I will go.

whatever happens to this thread it will not be last time the issue is raised that's for sure.
 

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You called it the search for the Holy Grail. I'm sure you know that CV carburetors are designed to have a stable reference vacuum under the diaphragm, for slide calibration and damping. Switching to pods replaces that stable vacuum with pulsations, violating the basic operating principle of the carburetor. In all my years here, no one has demonstrated that they can get around that, and have them function they way they were designed to. You yourself have been trying for a couple years, no?

It always goes the same way. We offer this advice and get mocked as being small minded because it's not what they want to hear, but no one to my knowledge has proven they can make it work as well as with an airbox. Maybe you'll be the one to succeed.

I didn't mention shutting this down because I'm trying to make the subject go away, but because of the intentional provoking and ignoring of my request. That said, I'm not shutting it down. Yet.
 

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My turn to offer some feedback....not from a mod viewpoint, but from that of a long time member here......

Its undeniable that the quickest, easiest, cheapest path to a fine running, reliable EX is clean, well set-up, stock jetted factory CV carbs, Fog modded factory airbox, correctly adjusted valves, spark plugs, serviced air filter, confirmed good battery, oil, chain, tires.

Safe to say the vast majority of members here are more interested in riding rather than fiddling ...trial and error, investing time and money testing carb tuning parts, majority just not interested in complicating the mechanical equation any further than it is. Whats to gain? The darn thing does 120 MPH anyway.....while delivering superb mileage. Add some ethanol treatment on a consistent basis, think ahead to treat prior to winter storage, adhere to Kaw planned maintenance schedule and the bike will remain super reliable over a long service life.
 

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hi guys. I completely agree with the above comments, if you have a stock bike your happy with there is absolutely no reason to alter it it's fine as it is. however that's not the whole story. many bikes that come to new owners are just not viable to return to stock and there is a huge following for riders who want something different.

either way the project bike is born, be it a café racer, street fighter, bobber, or just the engine fitted into something else. the common issue is the big plastic [elephant in the room] box that sits behind the carbs, so it just has to go.

as soon as you do the can of worms is well and truly opened, now other bikes like Hondas, Yamahas, Suzuki's. and some other makes including Kawasaki's that have CV carbs fitted. run quite well on pods [the only real alternative to the box] some even have them as stock, albeit via convoluted air ducts, so why not the EX. what makes the EX unique in this respect. this is the "holy grail" I spoke of.

well the answer is yes they can. quite few have done it although exactly how seems to be a bit vague. for sure the more work one puts in the better the results would be. now will pods give the bike more power "nope" will they make the bike run smoother "nope" just the opposite. but that is not the point. once the box has gone the goal is to get it running well enough to ride.


the OP has stated he has ordered a jet kit in hope it solves the issues, It won't as these kits only address 70% of the problem the other 30% is where the time and effort goes in. it can be done though, so discussions on how this is achieved has to be worthwhile for those not running a stock bike.
 

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there is a huge following for riders who want something different.
I'm still awaiting just 1 member of the "huge following" of pod users to offer feedback here. Notta 1.

I disagree with the statement...IMHO reality dictates it's a very small minority of owners who remove the airbox and accept the known consequences.

You're even admitting (i'm quoting your above post) "will pods give the bike more power "nope" will they make the bike run smoother "nope" just the opposite. But that is not the point. once the box has gone the goal is to get it running well enough to ride."

So WHY remove the box to begin with? Wow, bordering on masochism. I'm not seeing the logic in subjecting ones self to this.

I'm submitting, for a EX to ride NOW, run as intended, reliably, and pile on miles...airbox removal negatives far outweigh the benefits.

Exceptions would include custom, show bikes....for perceived visual benefits, riding not the primary objective.

Hey, its your bike, free to do as you like. Just be aware of + and - before going in.

Thats where the OP finds himself now, employing ideas and info from others to ease and simplify his quest.

Interesting that hes's not sharing HIS information...the seller and specific jetting contents in his purchased kit, thus shielding himself from comment there. Hey, its a 2 way street, no?

I'm done...yielding to all the POD users..chime in!
 

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I don't read any snarkenes in the OP post or title. I hear a guy who knows the airbag is required but can't fit it in his frame and is asking members here if any know of a viable other carb solution or what ever,

As far as I know (2nd hand) you can fit a set of Micuny flat slides. or you can jet them to run (Sorta).
Another suggestion A Weber 40 DCOE these are wonderful carbs ,about the pinnacle of carb design. This would require a special manifold but can be tuned to the nth degree.
Check a Harley shop they fit them to 74s

FOG
 

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Easy peasy....Sudco distributes and sells Keihin FCR flatslides specifically listed for EX500.....$850 bucks. :surprise:

OP .....Go for it! :grin2:


Sudco a long established seller, no doubt has done their homework and will support you going forward.
 

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Discussion Starter #17
I don't read any snarkenes in the OP post or title. I hear a guy who knows the airbag is required but can't fit it in his frame and is asking members here if any know of a viable other carb solution or what ever,

FOG
The only one who actually got my post ... thank you , and big thanks to yorkie on his post describing how beneficial this post could be I told you that this would happen like any other pod post...but it was slightly my fault for that caps I guess.. and coming from a moderator too like I said... I could screenshot it on my Mac if you would like but it doesn't display my title in caps I did change it at the same time I added my reply yesterday.

but again it is your right as a moderator to shut this thread down or ban me if you want if your really that butthurt lol, I'm just stating facts I low-key know people hate the point of this thread but I high key want them to look at it because its not just another 500cc running pods. its a 500cc engine that HAS to run pods because of the 250 frame or maybe a custom airbag could be made.. I don't mean to be a ******* but if someone takes my post the wrong way its not my problem...

P.S I didn't know you were a moderator when I read your post, I just read it as you telling me I will have negative people on the post.. that said I replied the way I did. and you didn't make it sound like I HAVE to change the title to lowercase it was more like you wanted to see it like that because it wasn't as important to you as it was to me .. I felt those words in capped but I guess thats not allowed.


Thank you to everyone for the positive vibes !
 

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Discussion Starter #18
Easy peasy....Sudco distributes and sells Keihin FCR flatslides specifically listed for EX500.....$850 bucks. :surprise:

OP .....Go for it! :grin2:


Sudco a long established seller, no doubt has done their homework and will support you going forward.
THANK YOU !!! email and info has been sent to them , awaiting update !

I know the jet kit won't make it run 100% but at least the bike will run so I can do the trial and error... right now the bike is not running because no working carbs at the moment.
 

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FCRs on a street EX would be overkill. Nice carbs though. (If you WANT FCRs, there was a pair for sale on www.vrra.ca/board recently)


An EX runs well with Mikuni VM32/34s or Keihan PW33 (You don't need/want the air strykers, PWKs. They're more for 2 strokes).


Holley carb built a billion dollar business on the fact that people don't know how to tune carbs (Quadra jets and thermo quads were/are FAR superior street car carbs to anything Holley sells. Harder to tune, but superior results if you get it right).
Holley has sold millions of carbs that replaced perfectly serviceable thermo quads or quadrajets. Yes, my '84 Olds Cutlass still has the original quadrajet... with low, mid and high jets and a bunch of squirters. (Try tuning a 4500 series Holley; 12 jets, 4 squirters [accelerator jets], 4 pump ramps, a bunch of air bleeds.....).


Sorry kids, this all takes a bit of knowledge to get this to work, we call it experience... and the ONLY way to get experience is to get your hands dirty (and maybe destroy some equipment).
I know this because I have tried. I raced an EX with CVK carbs. I have dyno ed EXs with CVK carbs. I ended up with modified VM34 Mikunis.
Here is a tip: GET A O2 SENSOR. Bung in a O2 sensor, read the sensor with a multi-meter taped on the gas tank and go nuts. Actual definitive data to tune with. seat of the pants dyno is NOT accurate.
 

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IF you are going to replace your stock carbs with something else, that you have no base line for, start with, in this order:


1) Pilot. You have to take an educated guess. Get it to idle.
2) Main jet: again you have to make an educated guess as to what main jet will get you the maximum RPM you want. There are formulas that will give you a rough estimate. Now run the bike at that RPM to be sure your mixture is right.
3) Now that you have the top and bottom, start screwing with the needle for mid range.
A 'Stoichiometric' AFR (AFR = air fuel ratio) of 14.7/1, meaning there is 14.7 parts air with one parts fuel, will get you the "cleanest" burn, but you will probably get more power with a richer burn... probably.

This all A LOT easier with a o2 sensor. A lot less top speed runs under load ( ALWAYS test for jetting under load).
 
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