Posts
551
Joined
4/11/2017
Location
The sticks, KY
US
Edited Date/Time
6/23/2022 1:26pm
What are the main things you all have experienced that im immediately gonna have to diagnose and or change, or add too?
I have been reasearching the STIC and not really too sure whats going on there, also have been lookig into the hinson clutch, and honda works connection rear axle and jd jet kit.
I want to run the bike on 50/50 pump/u4.4 mixture or maybe 70/30.
unless you guys have some better info.
only reason i say u4.4 is cause my sons 50cc bike runs well on it when mixed 50/50.
after i purchase the bike i hope to make it look exactly like his.
This ktm 250sx will be ridden at A class level.
please i would like to hear some suggestions!
I have been reasearching the STIC and not really too sure whats going on there, also have been lookig into the hinson clutch, and honda works connection rear axle and jd jet kit.
I want to run the bike on 50/50 pump/u4.4 mixture or maybe 70/30.
unless you guys have some better info.
only reason i say u4.4 is cause my sons 50cc bike runs well on it when mixed 50/50.
after i purchase the bike i hope to make it look exactly like his.
This ktm 250sx will be ridden at A class level.
please i would like to hear some suggestions!
As a fast rider you most likely won’t like how short 3rd is so a 49t sprocket is what a lot of guys switch to.
The Shop
Chassis wise a rear link and a steering damper help a great deal. The forks still benefit from a revalve.
A normal race prep (Loctite, tubes, grease, your favorite bars, oil the filter, set the air screw) is all it really needs.
After that, find your favorite gearing, pv setting, add an ERT2 and start burning premix.
If you want to make sure you are jetting from a good and stable staring point, I would replace the jet block oring and gasket. The stock jetting worked awesome on my 2017 with the small change to the needle clip position. So I never found the need to replace the jet block oring and gasket, but I have them sitting there in case it starts to run bad.
Now that I have done all of the basic race prep, I am looking for some better feel/comfort from my AER fork for 1.5-2hr races, but for moto, you might just run it as it is.
so after purchasing yesterday, i immediately headed to rocky mountain atvmc and on scratch and dent they had a pro circuit plaitnum pipe for 90$ that had a minor dent nothing serious, so i went ahead and picked up a silencer and jd jet kit and set of plastics and a seat cover and a set of bars, a air box wash cap, renthal 49t sprocket and a stand.
Im back, back in the saddle again. im back.
One thing I don’t think I saw anyone mention is the stock bar mounts. Even the smallest tip over will leave the front end out whack.
what premix and jetting specs are you guys using, i ordered the jd jet kit, and it seems to be here in a day or two should i wait to break the bike in witth the jet kit installed? should i have broken it in with all stock parts and pump gas? im just lost now.
It has a pro circuit plaitnum pipe and factory r304 on it.
it has lump fuel in the tank but am willing to dump it out since when i walked to the back of the dealership they had a ragged out gas can that wasnt capped off dumping gas into the tank, the shop was bery dirty and alot pf dust was in the air so i told the mechanic that was doing the pdi to not start the bike, as i knew it had no air filter oil on the filter.
That shop was beautiful in the front but ragged out in the back from muddy atv's and utv's i cant beleive they were doing service work in there witht all the dirt and grime flying around in the air.
im thankful i caught the mech before startingn the bike, im pulling the tank later today and dumping the fuel and will mix my own fresh batch if pump fuel is what i should run through it.
i also thought about running vp T4 mixed with castor 927 through it to break it in.
please give me some feedback as i have been on the four jokers for years.
This is my current jetting for u4.4 mixed 44:1 and amsoil dominator
MJ 490
PJ 35.5
Needle 42-75 (KTM option part)
Slide 5.75 (2004 KX125 option part. Stock is 4.0)
Clip 4th position or 3rd depending on temp.
Needle jet s-4 (stock is a s-1)
AS 1.5
PV 1 3/4 turns in stock spring
Pit Row
Easily one of the cleanest most predictable running motors. Watch the motor mount bolts they like to come loose, so do the subframe upper bolts.
Highly suggest sending your suspension to factory connection. They know how to do AER very well.
Also, i feel like nobody is doing KTM decals as hot as I am. Hahaha. Check my insta @rippinruts
Easily one of the cleanest most predictable running motors. Watch the motor mount bolts they like to come loose, so do the subframe upper bolts.
Highly suggest sending your suspension to factory connection. They know how to do AER very well.
Also, i feel like nobody is doing KTM decals as hot as I am. Hahaha. Check my insta @rippinruts
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