Hi this is my first post so be gentle lol ive been reading this forum alot and tbh ive had an information overload i just have a few questions about jet settings etc...
so far i have ordered the following:

Exhaust : Two Brothers Aluminum M-7 Full Exhaust
Jet kit: 2206 dynojet kit
Air box: kdx200 snorkel and K&N filter to suit

1. is removing the smog stuff necessary?
2. is drilling the crankcase vent neccesary?
3. will doing these two things alter my jet settings?
providing there is benefit from removing smog stuff and doing crankcase vent mods
4. What should my jet settings be?

5. i hear alot about this kouba A/F screw what one do i need? on there site they recommend the fs-2 but say its only good for 2.5 turns out before it mite fall out due to vibration im worried that i mite need more then 2.5 tunrs out or is this acceptable to use?


to the point answers would be greatly appreciated like i said having a bit of a overload on information. and i dont want to stuff anything up when i do it lol.

Thank you for taking the time to read this hope to hear from someone soon

 

First off, welcome to the forum!

What year is your bike? Sounds like a 06-07 since you got the dj2206 kit?

The kouba screw helps with air/fuel adjustments, without it you'll most likely have to remove/tweak your carb to the side to adjust for jetting/idle.

Removing the smog just free's up the bike a little bit, I didn't do the crankcase so I can't answer that one. Neither should alter your jetting but I will say everyone's jetting seems to be different. I should be using a dj128 main, 3 clip, 3 turns.. but I am using a 128 on the 2nd notch... will be trying 124 with 3rd soon. I had the kdx snorkle but it surged so I pulled it and will try it again when I lean my main out.

Jetting really is a test, try, test, try process. You want it to provide power through the entire range of throttle, with no surging/choking/coughing or flat spots. If you go to rich you'll loose bottom end also.

You're on a great site though and there is a lot of great members and info to go on and bounce ideas off of.

Paul

 

The smog components are fortunately not really an impact on performance on this bike. Most people remove those parts because it's a fair amount of plumbing that could over time allow a vacuum or exhaust leak as those components age. It's also a bit easier to work on the bike with that stuff out of the way. No real effect on jetting.

I don't think you need to worry about the crankcase mod on this bike. It doesn't exhibit the heavy crankcase variances like a KLR 650 does. If you ever have the airbox completely off the bike for a big service...like a big bore kit or such...just drill out the hole a little bigger in the plastic where the crankcase hose connects. Won't hurt a thing and may help a little with the bigger bore. No real effect on jetting.

On your DJ kit, whether you have the '06/'07 model or '09 and later, it will work just fine. You'll just drill the slide hole bigger instead of replacing the slide spring...just follow the instructions with the kit...it's easy.

The Kouba screw just allows easier air/fuel screw access for idle mixture adjustments. I don't know the number off hand, but I think there's only one for either the KLX300 or the KLX250's.

On jetting, Paul's recommendations are about right and will at least get you going if you find you need to fine tune later. With a full exhaust and the airbox lid off or opened a little bigger, the 128 main is a good bet. Running a snorkel seems to have more variables for some reason when it comes to final jetting setup for varying conditions. I wouldn't go over 2.5-2.75 turns out on the air/fuel screw due to the chance of it vibrating out of the carb. On mine even with a 300 bore kit, fully opened/modded airbox, and a full Muzzy exhaust, I found the stock 35 pilot jet and 2 turns out on the Kouba air/fuel screw to be about perfect. I'm not sure why some have 38 or bigger pilot jets, but that may just show that every bike is not the same.

 

Use several wraps of teflon tape on the kouba screw. It helps keep it from vibrating out and also helps seal the threads.
marc

 

return the two brothers exhaust if you can..that thing is ear shattering...fmf q4 with megabomb (or powerbomb) full exhaust is probably your best sounding and quietest...

kdx200 snorkel and k&n works well together...other good option is foam filter with no snorkel....those combinations worked well for me...

removing the smog stuff is not necessary, but plan on removing it when you do your first valve adjustment since getting the canister and tubes out of the way helps when you get the valve cover off anyways....

kouba screw is not necessary...you can use a screw bit to adjust the a/f without removing the carb....

jetting is like puzzle..too many variables....if you go with the recommended on the kit, you'll be fine...if you want to use the bigger jets..128 or 132, 2.5 turns should be about right...but, depending on the elevation and mods...it varies...once you figured out the proper jet size to use...just adjust the a/f screw little by little until everything runs smooths...

 

Those factory recommendations can be hit or miss... I'm at DJ 124, 2.5 turns and 3rd clip with K&N, FMF, ground header, and no snorkel. Plug was dark as a thieves pocket when I pulled it for winter storage. Roughly 900 ft here.

 

Thanks for the responses and the welcome

its a 2010 model but i know i read somewhere that 09 and above were using the 2206 cos the one dj have listed for the klx250 is very similar to stock the kit i have is for the klx300

i emailed the guy at kouba and part number is the FS-2 for anyone that was interested

.
its too late to return the exhaust now lol but i dont get to ride the bike as much as i would like too so if its to loud ill just pinch some ear plugs from work lol..

good idea thanks

I live in hervey bay qld australia so im 62 feet about sea level if that makes a difference to anything at all? i gather that means my bike atm is even more lean then standard? gets richer the higher you are? so would i want the bigger jet or a smaller of the two mentioned?

Thank you all for clearing up all my questions

 

I have stock can, 124 dyno jet with 3rd clip, a/f about 2 3/4 (actually too much) without snorkel and I'm at about 2000 ft above sea level, runs much better than stock, as long as you don't go super rich and obviously don't downsize, you should be in the ball park

 

Australia? Are they Fuel Injected there?