Now, is there an advantage to the Dynajet setup vs shimming the stock needle, drilling the slide and getting a few jets to play with? Five jets (3 main and two pilots) would be $35. The shim is a few cents. A drill is a couple bucks, if you don't have one already. You're still under $40. You might have enough left over to get a Kouba fuel screw. How bad could the stock needle be? Mine seems to work pretty well.



Edit: I get my jets from this guy: http://www.pjmotorsports.com/keihin-...ml#main%20jets

 

It's the needle that's special IMO. It's a good taper for more and better response. It's a little like paying for revalving of your suspension. Fairly low budget parts, but in the right configuration they are impressive.

 

Hmm. I'd like to see a picture of the DJ taper next to the stock. I can see maybe an improvement in throttle response but at WOT it seems the important thing would be the volume of gas that can get around the needle and through the jet. Is the stock jet that limiting? Just musing. I'm sure small differences in needle profile do have an effect.

I actually ordered an NITC (spl?) needle with clips and the bike ran crappy at low speeds after a while. Turns out the needle was significantly shorter than stock and let the bike runway too rich at minimal throttle. Put the stock needle back in and problem solved.

 

Did you try dropping the N1TC needle on the clip?

 

I have the N1TC needle in my bike, it has been running great for years...

 

Does that N1TC need a washer or two on the top to keep it pushed down, like we do on the dynojet needle? Just thinking maybe the washers weren't in, or on the wrong side, letting the needle bounce or set way too high...

 

Actually it turned out that the NITC needle was a good 4mm shorter than the stock. It probably wasn't even seating down far enough into the jet, allowing the bike to be super rich at partial throttle and idle. Maybe I just got a wrong needle. I ordered it as a KLX300 needle from Bikebandit.

Edit: I had the clip all the way to the top, leanest setting.

 

Yes there is a washer.