Purchased a new OEM Kehin Carb

David Maner

Never been run, new take off from a GX 390, I was there when they were taking it off and changing it out to a different kind of carb. Didn't pay any attention to what they were putting on as I was interested in checking this honda carb out. Get rid of this china knockoff carb on my engine. Plenty of carb for me, no need to go to a bigger or different kind of carb for my use. I recently purchased two of the china knock offs hoping for a better built carb but to no avail. When you look at the knock offs up close neither is worth throwing away. But then what does one expect for 11 bucks apiece.
Now I have a genuine honda GX 390 carb and my worries are over, after close scrutiny I was sold. Put the adjustable high speed jet I have in it and forget about carb problems

On a side note. On the two knockoffs I bought both of them have different size holes that feed the float needle valve and neither of them have the 'right off idle' jets in the correct place in comparison to a for sure Honda Keihin carburetor and my years of experience with carburetors. Due to the incorrect placement of the off idle jets in this carb on my engine, I have to run it a tad rich on the idle circuit to make up the difference and due to that I'm breathing fumes from a rich mixture of gases when I'm going slow as I often do looking for mushrooms and when the wind is moving the right direction to put it in my space. The trails I travel are as crooked as a dogs hind leg so there is no way to completely stay out of the path of the fumes. I guess I could go back to the weights and springs in the clutch as it came to me and be running the engine at 1800 plus rpms instead of the right off idle speed but no way am I going to do that. Nothing I like worse than an engine running at a speed not in sync with the speed I'm traveling at.

Not complaining by any means just sharing what I'm having to do and why to get where I want to be. I like the fact that when I'm on the street this engine will haul my butt on down the road and I drive it on the street quite often during the warmer months

Now to get the time to change the carb out before the morels start coming in. Right now I'm down with acerbated COPD, wearing/breathing oxygen 24/7.

If I'd known what getting old was going to be for me I'd have went ahead and had a lot more fun when I was younger so I'd not have lived this long. Just kidding but you get my drift I'm sure. All I know is one must take care of their lungs. Just had blood work done last week and I'm as healthy as a horse except the breathing part. Only one thing, can't remember what it was, was one number high and one was one number low, neither according to the doctor was a concern. Other than that pretty much right in the middle of where the doc say those numbers need to be. Cholesterol is 156 total, high and low combined. both right in the middle of the range they need to be.

Made in Japan Keihin GX 390 carburetor. YES

Exhaust is exiting at the rear of my cart slightly to the side and there is no leaks. Nothing more I could do to fix that fume problem with my exhaust. Maybe run it up like an 18 wheeler but it'd get knocked off as soon as I headed in the woods so thats a no

PEACE

BGW

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sho305

It might work better but clones tend to run ok. Try it and see. Odds are you will have to change to a motorcycle or scooter carb to get better, those carbs are made to be throttled anywhere and the lawn carbs really are not. Or course its not a bolt on to swap to those other carbs. Hang tight and get better so you can get back on the cart!

Rooster59

Is the carb you are removing the carb that comes with the VC460? Just curious. Many times I have wondered if there was a way to find a carb for a pre-EPA engine that still had all the adjustment screws accessible. That would probably require going back 20+ years.

Shepard

If you add an adjustable main jet to the original 460 carb -- it's fully adjustable. It comes with an adjustable fuel/air screw.

David Maner

Yes it is. The low speed jet is there but I had to buy the adjustable main jet

I'll be using the adjustable main jet in this new carb. I purchased it on ebay.
User ID waterlooboy2hp
I just looked and he has none for sale at this moment but here is how he has listed them in the past and if you keep checking ever few days if his past is any indication of the future he'll have them listed once again.


HF Predator Engine Adjustable High Speed Needle Assembly

Rooster59

Since I first read your original post I have been searching for longer carb studs to fit my velocity stack/filter adapter from EC Carburetors.
https://eccarburetors.com/estore/328...ategory_id=211

While looking for studs that will fit this I found this carb at a reasonable price. And low and behold it appears to have an adjustable idle mix jet.
http://www.arcracing.com/dj-3225-car...onda-gx390-hp/

No idea how this compares to the performance of the 460 carb but it isn't too expensive if you have to change jets.

By the way David, you're killin' me with that avatar pic.

Shepard

NR Racing has a variety of carb studs listed under parts.

sho305

My 420 has M8 threads in the head, I bought SS allen button head bolts to fit my custom intake on there.

Any carb sold on a complete engine has to be EPA and jets are disabled, or a stock replacement usually is too. If you buy an engine "kit" like the 460 they can have them, or buy a carb separate. The carbs do not come with adjustable jet anywhere I have seen other than you might find one at a Kart or racing place. According to what I read elsewhere the main adjustable jet for a gx200 (6.5hp) works in the larger clones, that one is very common its engine gokart and all them buggies/minibikes use, but I can't verify that personally. Other carb parts are different size of course but someone had a 6.5hp kit listed with the adjustable that was dirt cheap someplace. The ebay listings change a lot.

David Maner

Any day now they should start popping up around here.

When they do I'll post it because it won't be many more days until you'll start finding them around your place. Beings as how you're a tad north of me and they'll be a little later coming in. Well worth the time it takes to find a mess. As you know once you find a mess most times you can come back the next day or a few days and find a few more. Next season go back to the same area and start all over again. I have 5 good producing honey holes found that I find most of ours at.

ETA: That carb you linked to is exactly the carb I just purchased. Hopefully I'll feel like installing it tomorrow. I really don't have any need for any more power or speed from this stock 460 for what I use my cart for so I think this carb will fix me right up. I'm certain I'll be able to adjust the low speed air fuel ratio to where its not having to run rich to make up for that little lean flat spot I have right off idle due to a mis placed off idle gas port in this carb I have now. Sometimes it appears the Chinese just don't seem to pay enough attention too the small stuff. Things that are critical to correct operation. Especially in my case with copd and all. Again if not for my breathing problems this carb I have would be fine, most people won't even understand the problem I have with it.

David Maner

Once I find out that this new carb fixes me up I'll more than gladly give you this one I'm taking off if you want it as I'll not have any use for it anymore.

I'll PM you for an address if you decide you want to give it a try. I'll even pay postage as it can't cost more than a couple bucks and if a couple bucks breaks me I'm already strewed. :-)