Two Stroke Motocross

Two Stroke Motocross Forum => General Two Stroke Talk => Topic started by: motox11 on April 21, 2013, 10:35:44 PM

Title: KTM 250sx jetting
Post by: motox11 on April 21, 2013, 10:35:44 PM

I plan on doing a 39mm oval bore with my ktm 250 this week instead of keeping the 36mm stock bore. instead of playing around with jetting, i was wondering if anybody had some good jetting specs that they could share with me to save time or at least point me in the right direction. The elevation is about 1000 feet for my area.

Title: KTM 250sx jetting
Post by: Jeram on April 22, 2013, 12:22:43 AM

I wouldnt be copying anyone unless they have the same mods, temp and elevation.

For something as technically specific as this, I would try KTMtalk's 2 stroke section, they have some great jetting threads on there.

Title: KTM 250sx jetting
Post by: Stusmoke on April 22, 2013, 01:56:31 AM

Also check out dicksracing's intilijet carb mod for the 250sx or whatever it is. MXA had some sweet results with it apparently. Link here: http://motocrossactionmag.com/KTM/News/INSIDE-MXAS-WORKSHOP-BUILDING-THE-ULTIMATE-2012-KT-8964.aspx

Title: KTM 250sx jetting
Post by: maicoman009 on April 23, 2013, 04:58:49 AM

Quote from: Stusmoke on April 22, 2013, 08:56:31 AM

Also check out dicksracing's intilijet carb mod for the 250sx or whatever it is. MXA had some sweet results with it apparently. Link here: http://motocrossactionmag.com/KTM/News/INSIDE-MXAS-WORKSHOP-BUILDING-THE-ULTIMATE-2012-KT-8964.aspx

As you mentioned on here Stusmoke I would most definitely get a Intellijet carb from Dicks Racing! I recently rode a 2009 KTM-250xc-w & the jetting & power was near perfect if not perfect!!! I believe the Intellijet carb runs about $485.00 give or take,but they are well worth that price imho!!!

Title: KTM 250sx jetting
Post by: Stusmoke on April 23, 2013, 07:43:33 AM

Quote from: maicoman009 on April 23, 2013, 11:58:49 AM

Quote from: Stusmoke on April 22, 2013, 08:56:31 AM

Also check out dicksracing's intilijet carb mod for the 250sx or whatever it is. MXA had some sweet results with it apparently. Link here: http://motocrossactionmag.com/KTM/News/INSIDE-MXAS-WORKSHOP-BUILDING-THE-ULTIMATE-2012-KT-8964.aspx

As you mentioned on here Stusmoke I would most definitely get a Intellijet carb from Dicks Racing! I recently rode a 2009 KTM-250xc-w & the jetting & power was near perfect if not perfect!!! I believe the Intellijet carb runs about $485.00 give or take,but they are well worth that price imho!!!

I don't understand how it works but its been met with glowing reviews.

Title: KTM 250sx jetting
Post by: Micahdogg on April 23, 2013, 02:51:11 PM

I heard the intellijet turns into a leaky mess in short time.  That (more than price) is holding me back. 

Title: KTM 250sx jetting
Post by: rlaj1004 on April 23, 2013, 03:12:23 PM

I have Dicks racing counter bore and the intellijet on my 250SX. It is fantastic. Not sure how it changes the power curve but it feels like it hits a second gear within the gear. When it comes on if I am hard on the throttle it will pull the wheel off the ground in 3rd and 4th. You also can change the jetting with a simple dial based on temp or elevation. And yes it is pretty much right at 500, was worth it to me.

The advantage of what they do is they leave the opening 36 and conter bore it to 39 so you have less jetting, idle issues with the added power of the larger bore.

Never heard it becomes a leaky mess, mine is not, but I am pretty meticulous with maintenance.