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Post by millsc on Mar 7, 2013 18:30:06 GMT -5
i got this carb today its not a 24mm like i thought, its a 26mm, i have it so i figured i'll give it a try will report back with results. Attachments:
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Post by ericrockstar on Mar 7, 2013 18:53:18 GMT -5
It's probably the same, the supplier just gave the outer diameter instead of inner.
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Post by millsc on Mar 7, 2013 18:56:45 GMT -5
The 24mm carb i have on my tapout works good, i bought this one for my roketa, but going to put the 26mm on my tapout scoot and see if its worse, same or better, i wanted a 24mm carb.
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Post by jvanderwarf on Mar 7, 2013 19:15:48 GMT -5
Let is know how it works out and where we can get one
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Post by millsc on Mar 7, 2013 19:24:19 GMT -5
the 24mm carb seems to work well with my big valve head with 22mm intake and ported exhaust port, performance exhaust and a9 cam, not sure the 26mm carb will yield any gain, i'm guessing it will be worse, ill test it tomorow.
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Post by millsc on Mar 7, 2013 20:49:22 GMT -5
I put it on it seems like it will work, i'm getting some sputtering at midrange, didn't do alot of tuning yet but its doable
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Post by millsc on Mar 7, 2013 22:39:44 GMT -5
Having a hard time getting rid of the midrange spudder it idles smoother and all, want to make it work any ideas guys?
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Post by ericrockstar on Mar 7, 2013 22:43:44 GMT -5
Drop the diaphragm needle a notch? Re-adjust a/f screw.
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Post by millsc on Mar 7, 2013 23:07:35 GMT -5
will do that in the morning, gonna make this work
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Post by millsc on Mar 7, 2013 23:10:00 GMT -5
extreme smooth idle with the 26mm carb its louder sounds meaner too, seems to have more power, just got to get rid of this midrange spudder
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Post by xxwoodmanxx on Mar 8, 2013 5:41:08 GMT -5
On your 26mm....what is the stock main jet size vs that of your 24mm? Might have to go up a size or two
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Post by millsc on Mar 8, 2013 9:28:29 GMT -5
actually i'm going to have down jet it seems, maybe my 24mm carb was messed up, was running a 107
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Post by millsc on Mar 8, 2013 11:03:12 GMT -5
ok i tried all jets from  - 110 all needle clip postions, the 26mm carb just won't work 24mm is the max you can go at least from my testing just too much air. |
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Post by millsc on Mar 8, 2013 11:38:19 GMT -5
anyone interested in buying a keihin 26mm carb ;D
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Post by woowilly on Mar 8, 2013 21:38:40 GMT -5
A possible fix might be a slightly stiffer slide spring. That would cause airflow velicity through the venturi to be higher at part throttle. With the ideal spring, The slide would still fully open, just at a higher rpm when the intake vaccum came up high enough for a fully open big bore carb to be able to well atomize the fuel.
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- 110 all needle clip postions, the 26mm carb just won't work 24mm is the max you can go at least from my testing just too much air.