TRX250R.ORG

Workshop => Carburetor, Intake, and Exhaust => Topic started by: dirtyd on September 21, 2014, 10:31:10 PM

Title: help figure out what needle I have
Post by: dirtyd on September 21, 2014, 10:31:10 PM

I have a Keihin 38mm A/S quadvent and I want to try out some leaner needles but I don't know what I have to start with. I looked at the stuff posted in the "jetting data base" thread to figure out the 3 letter conversion. But the numbers on my needle are not like whats on the pages. Here is what is marked on my needle (A715 289R A327 A487)

Title: help figure out what needle I have
Post by: Jerry Hall on September 22, 2014, 07:44:53 PM

Those numbers are not numbers you will find on the Keihin after market needles.  I think you have a needle that is an OEM number.  I do not have a way of cross-referencing the numbers with the needles whose dimensions are published.

In a situation like this I would carefully measure the needled and then compare the dimensions to those that are published so that you have a reference point to work from

Title: help figure out what needle I have
Post by: dirtyd on September 22, 2014, 09:00:57 PM

thanks Jerry. I googled that number and got some threads from other forums and it looks to be OEM 2000 CR250 needle

Title: help figure out what needle I have
Post by: RyanWsly on September 24, 2014, 06:20:37 PM

Just for reference I have a DGJ in mine. I ran that needle with a stock cylinder and my 300 cylinder so it should be a fairly safe starting needle for you, I'm in IN so weather ect. should be similar. From what I read that is some weird triple taper needle from a CR250 so I'm guessing that is why it has all of those funny numbers.