I wanted to make a thread about my carb setup. When I was searching for information about setting up the carb for 5k feet asl I didn't find much. So after much searching and lots of testing, this is my setup and some references.

Carb Settings:
#35 Pilot Jet, 2.25 turns out on the fuel screw, Dynojet needle on 4th notch from 2182 kit for KLX250SF, 126 Dynojet Main Jet, the diaphragm spring from the kit, float fuel height set according to service manual (this is very important for low rpm response). 124 main also works but feels flat, as does the needle on 3N. 128 seems to work nearly the same as 126. 132 main and needle in 5N are too rich.

Mods:
No airbox lid, UniFilter air filter, removed backfire screen, FMF PC4 slipon, removed smog stuff.


References:
CV Carb Tuning Procedures

Care & Feeding Of The Keihin Carb

https://www.kawasakiforums.com/forum...-tuning-36018/

Main Jet Correction

Mikuni carburetor operation and tuning


I hope this helps someone in setting up the CV. Become an expert at removing and reinstalling the carb from the bike and don't be afraid to try different setups. I know I like my bike so much more now but my neighbors probably hate me now jaja.

 

Thanks very much for posting these details. Noticed the 2152 (2009-2014 Kawasaki KLX250S) and 2182 (2009-2010 Kawasaki KLX250SF: yours) kit comes with these main jets:

DJ112, DJ116, DJ120, DJ124, DJ128, DJ132

I'm guessing you ordered the DJ126 separately?

I want the bike as quiet as possible so thinking of this slip-on

Q4 slip-on Sku #220071
Products - MX - FMF Racing

I plan to ride over 13000 ft (CO) to below sea level (Death Valley NP) so I am curious whether the DJ kits provide enough range of jets and how much they need to be changed.

 

If you want the bike as quiet as possible, keep the stock setup! The Q4 is regarded as the quietest aftermarket exhaust, but it is significantly louder than stock. The Megabomb exhaust header does quiet it down to much closer to stock, but then then the whole system will wind up costing you over $500. At that point you could put a big bore kit in it for less.

There was a google doc at some point with a spreadsheet that had jetting numbers in it. Does anyone know where that is, or if it's possible to add to it?

 

https://docs.google.com/spreadsheets...Dnc/edit#gid=0

 

Yes, I bought the MJ126 separately. I think the kit should have everything you need for those altitudes, check out the main jet correction link in my first post.