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250x jetting
Posted: Sun Jan 15, 2012 1:36 pm
by fourperf
Hey Guys, I bought a jd kit for a previous 250 which I sold (2009).
I live in Ca and ride at gorman a lot (actually my sons bike and he does) We bought a new 2012 250 for him. I had previously used the red needle (in the old bike) I know the blue needle is a little richer than the red needle. Can I run the blue needle one clip lower than I would the red needle? I am planning on opening up the air box and putting on a fmf Q4 with the stock header. On the old bike I ran a 165 mj and the red needle. I am hoping I can use the blue needle and and run a 160mj. I am obviously trying to avoid buying another jd kit as the bike completely tapped me out.
Thanks
Mark
Posted: Sun Jan 15, 2012 3:31 pm
by Keith72
Whats wrong with the stock needle?
Posted: Sun Jan 15, 2012 7:36 pm
by fourperf
Keith72 wrote:Whats wrong with the stock needle?
Probably nothing but ordinarily I would like to richen the needle circuit up a bit but since they are no longer adjustable......
I probably will just throw a bigger mj in and call it good to go
Posted: Sun Jan 15, 2012 7:49 pm
by Keith72
Check the 250x section of the forum and click on the jetting database that is stickied on top. There are a few people running the stock needle. If you want to richen it lower the clip on the needle.
Posted: Sun Jan 15, 2012 8:04 pm
by fourperf
Keith72 wrote:Check the 250x section of the forum and click on the jetting database that is stickied on top. There are a few people running the stock needle. If you want to richen it lower the clip on the needle.
I don't believe you can move the clip on the stock needle.
Posted: Mon Jan 16, 2012 4:25 pm
by fourperf
well, just ran it with the stock needle and a 158mj. open airbox and fmf Q4.
Runs pretty darn good. might try the JD blue needle as I have 4 of them.
Posted: Mon Jan 16, 2012 5:25 pm
by Keith72
May as well cant hurt to try.
Posted: Tue Jan 17, 2012 10:57 am
by MattBennett23
I have a 2009 250x. The stock needle is not adjustable. I have the JD Jetting kit and it is great! Currently running the red needle. If you need to adjust the stock needle, just get the kit. Consider it as part of the cost of the new bike or new exhaust and it wont sting as bad!
Posted: Tue Jan 17, 2012 2:46 pm
by fourperf
have purchased 2 of the kits already for 2 other 250 x`s. They are great. I had already used the 2 red needles and have 2 blues already. JD answered an email and suggested using the blue 4th clip from the top. The bike ran so much better with the blue needle over stock (obviously) I thought it might be too rich but it worked a charm. Thanks JD.. Great customer service!
Mark
Posted: Wed Jan 18, 2012 12:29 pm
by crfsonly
glad to hear it worked for you!
Posted: Fri Jan 20, 2012 7:47 am
by fourperf
Thanks Ken
Mark
Posted: Tue Apr 03, 2012 3:15 pm
by billygoatgruff
fourperf, I too have a couple extra blue needles. And I have a buddy that is to stubborn to buy a JD kit. I was thinking of trying a blue needle for him.
So what did you end up using for a main jet with the blue needle? Did you go one size smaller from the red? What elevation are you?
I'm looking for a baseline to start at with the blue needle. I'm thinking of starting with 155 main and one clip lower on the blue. possibly a 150 or 152 main.
Any suggestions?
In my bike, I live at 7500 ft and go up from there. I run the red third clip and a 155 main per JD's recommendations. no bog and runs awesome. My buddy actualy live closer to 8,000 ft and again we go up from there. Although most of our riding is done at 8-9000 ft.
BGG