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› Carb Needle - Old Versus New
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Carb Needle - Old Versus New (Read 52 times)
VortecCPI
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Carb Needle - Old Versus New
05/22/19 at 16:26:43
Does anybody have a picture comparing the 1986-1995 needle with the 1996-and-up needle? I am thinking of trying an old needle in my wife's 2012. Not so much for the adjustability but more so if the old needle tends to be a bit richer at part-throttle positions.
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batman
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Re: Carb Needle - Old Versus New
Reply #1 -
05/23/19 at 11:24:07
Vortec I don't have both carbs to compare , but it's hard to determine if the old jet would make fuel flow richer , that jet ran with a 155 main jet , and Í think a larger throttle plate ( larger throat ?) It's hard to guess how it would work in a newer carb , but it might work well if carefully tuned. I be interested in hearing about the results if you decide to try it
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VortecCPI
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Re: Carb Needle - Old Versus New
Reply #2 -
05/23/19 at 11:32:23
batman wrote
on 05/23/19 at 11:24:07:
Vortec I don't have both carbs to compare , but it's hard to determine if the old jet would make fuel flow richer , that jet ran with a 155 main jet , and Í think a larger throttle plate ( larger throat ?) It's hard to guess how it would work in a newer carb , but it might work well if carefully tuned. I be interested in hearing about the results if you decide to try it
I am going to order an old needle and do a few measurements for a comparison. The Honda CRF230F has two needles and they are identical except that the new ones have just one clip position. I suspect the same may be true for our bikes.
This thing is so close to being perfect i am not going to give up. Needs to be just a tiny bit richer on the needle for mid and part-throttle work.
Even so... It is MAGNITUDES better than it was stock!!!
Thanks to this forum, of course...
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batman
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Re: Carb Needle - Old Versus New
Reply #3 -
05/24/19 at 21:52:26
Vortec , You said your running a 150 or 152.5 it may be better to leave that in place to start, and if your a bit rich , replace the stock 52.5 pilot jet on your carb with a 50 , seeing the old carb ran a 47.5(don't know, just a thought ).
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