Maintenance & Technical > KX250 / KX125
Getting the jet needle out of the throttle valve?
Friar-Tuck:
Well, unfortunately either way you have to get into the carb, which ever you prefer.
Also yes on the suspension, even the weight of the bike on the springs does take some toll on them.
Even a cheapskate like me has a five gallon bucket with a small piece of wood on it to unload the suspension while not in use.
Tuck\o/
mustangfury:
ok so when i change the mid range jetting, to test that, do i ride around in the mid range for a while (1/2,1/4, or 3/4 throttle?) and then just hit the kill switch after it warms up to operating temp., then take a look at the plug?
I also noticed the slow/pilot jet targets more of the low speed than the mid range but has some effect on the mid range according to the diagram on keihins website.
http://www.keihin-us.com/am/_media/pdf/slide_valve.pdf
Would i test the pilot jet using the bikes idle or some midrange throttle (1/4 or 1/2)?
Here are pictures of what the plug looks like from riding around at 1/4 to 3/4 throttle with the current settings: 155 main, 3rd clip position, 52 pilot.
Friar-Tuck:
Hey Stang,
Just got back from Work, The Plug chop is for the main. Yes you are right about the the circuits.
Cleaning up the midrange will prevent loading up the pipe and powervalve with excess fuel and blasting it out on your bike when you run the bike up wide open.
How is the throttle response? how is the bike running now? what is the spooge /oil factor now?
By the way,You have a great camera there, I can see the ring at the base of the porcelain in one pic and still hasn't gotten any color on it yet.
The plug looks way better than the first photo's no? The only way to verify the midrange is either with an O2 sensor or how it feels in the seat of your pants. You should be able to tell the difference of when you first started changing the jetting and now. When it was running rich & oily the sound of the engine is more of a "blubbery" sound.
The engine note should be more crisp, and your throttle response should have improved.
What you are looking to do now is get clean acceleration off Idle to wide open.
Tuck\o/
mustangfury:
The camera is a canon powershot sd1400. It is awesome at macro photos and photos in general. If you put it on a stand you can get the pictures even better than what i posted. I really like it. It's the nicest compact camera i've ever found.
The throttle response is great pretty much all throughout. The only time it may be a little hesitant is right at the start from a stand still. At the top end it is a beast.
At idle the muffler tip gets a little oily and begins to douse the rear fender.
The spooge/oil factor is shown in the picture of the rear fender in the previous post.
I have had finals this week at college, so I haven't had much time to mess with the bike. I will be done this monday though and my buddy and i are hoping to take a trip with our bikes sometime soon after that. I will definitely be working on it soon after monday.
Friar-Tuck:
Stang, best of luck on the finals.
I was hoping the spooge was tapering off. There are needles with a larger taper, and actually with up to three different tapers. Unfortunately the needles are around $25.00 so you don't really want to buy a few and try to clean up the off Idle
without making darn sure thats what you need.
Run a few gallons of pre-mix through the bike and let me know if your still getting the plague on the fender..
Tuck\o/
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