That's the theory... "Back in the day" when all we had was the KLX300 kit, one of the extra mods was a 'spring mod'... Basically, cut a few coils off the spring, allowing the slide to lift easier. Supposedly improves responsiveness.

I did it in combination with my other carb mods, so I couldn't tell if that specifically made any difference. I took off 3/4 inch.

 

To make sure that the 09 klx carb is putting out its best, one should should pick up a 7/64" drill bit to mod the slide. Also order the #2206 needle when going w/ the #2152 kit. Just to get the most out of whats available.

 

Does anyone have the 09 KLX 250 DJ kit? If so, is the spring shorter? Or does it seem to have less pressure?
When I emailed DJ tech email, they indicated that they don't sell individual pieces only the full kit. So to get both needles, you would have to purchase both kits -but maybe if I contact DJ sales, they would sell them?
Glen

 

I would call the tech dept & ask them if they could send out the DNO352 needle. Explain to them that the power increase isn't what you expected and was looking for more in the mid range.

The customer service dept probably would sell only the whole kit.

I de-restricted both ends of my head pipe and was able to increase the pilot jet to a 38 (no one had a 37.5 available). 2.25-2.5 turns out on the Kouba a/f screw. The only reason I tried it was b/c the head pipe was turning a deep blue, leaving me to believe that it was lean. As per DJ instructions a 128 main jet installed.

Good Luck

Slight popping on deceleration was eliminated also.

 

LOL, just buy the 300 kit and call it a day. cut some spring coils off if that tickles your fancy, but that has never been recommended around here.

fingermullet- You're an idiot!

 

I have the 300 kit for my 07 250. I called DJ sales and was able to purchase slide spring # DSP027 for the 09 250 kit for $ 3.50+UPS -I'm going to see what the differce is from the stock slide spring.
I'll let everyone know what I find out.
Glen

 

Received my DynoJet 2152 Kit yesterday. Put it in- works great. The kit has jets from 116 to 132 I think. They reccomend a DJ124 Jet with snorkel removed and stock exhaust, or a 128 with snorkel removed and a pipe and/or slip-on.
Spring is shorter.
Uses a needle, clipped on 3rd notch down with two spacers. Very happy with it as a kit, although you can probably do it cheaper by ordering 300 needle, jets, and drilling your slide...........

 

That's what others have said they used to do -about how much shorter? Does it still feel like it has the same overall spring rate?
Thanks, Glen

 

Just curious, as of right now unmodded I get 62 MPG on my 09 KLX250s. Since you guys put in the jet kits, exhaust, etc, how much has your Gas Mileage changed?

 

^ 70mpg