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General Category >> Rubber Side Down! >> Carb Needle - Old Versus New
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Message started by VortecCPI on 05/22/19 at 16:26:43

Title: Carb Needle - Old Versus New
Post by VortecCPI on 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.

Title: Re: Carb Needle - Old Versus New
Post by batman 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

Title: Re: Carb Needle - Old Versus New
Post by VortecCPI on 05/23/19 at 11:32:23

6063766F636C363A020 wrote:

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...

Title: Re: Carb Needle - Old Versus New
Post by batman on 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 ).