2013 KTM 250 SX

Digger29
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Digger29 11/14/2012 9:01am
11/14/2012 9:01am
Ha ha :-) when I write Dowdys old mechanic I just want everyone to know that he has built many bikes for top pros such as John Dowd & Kyle Chisholm & Robby Marshall & Josh Clark & many others. My point is he knows his shit & only does things that work & doesn't say or do anything willy nilly without doing the research first. He is a sharp as them come.
nornevrder
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nornevrder 11/15/2012 3:44pm
11/15/2012 3:44pm Edited Date/Time 11/15/2012 3:47pm
Now I am really going to be paying attention to this thread seeing that my 250sx is coming in soon. I am super excited and nervous about getting back on a 2 stroke. Any recommendations would be greatly appreciated.
mynewcr250 11/17/2012 6:50am
11/17/2012 6:50am
to you 300sx kitted guy. couple questions, hope the OP doesnt mind.

1) are you running the SX head?

2) are you running your SX ignition, or the included XC ignition?

3) have you lost the ability to rev the bike out? i want a 300, but not at the sacrifice of being able to rev the bike out (think 250 vs 500 2t)
T-Fish
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T-Fish 11/17/2012 12:38pm
11/17/2012 12:38pm
I love my 300SXS-kitted 250SX.

I don't see why anyone would advise against it.

The Shop

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MXBOY2661
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MXBOY2661 11/17/2012 4:57pm
11/17/2012 4:57pm
my NEWCRF250 my 12 ktm 250, w/300sx kit , i use my ignition from the stok 250 sx, n i have the sx head, mike s at cycle playgroud did his magic to it, my bike revs to the moon, just as much if not moree than my 250sx all around it has a very usable powerband, i explain it this way it the same way ur 250sx is except it revs way further than ur 250, n has way more torque...the 250sx brought the fun back into mx for me, the 300 makes the smile underneath ur helmet , last alot longer! u can not make a 250 sx run the same regardless if u port , blue print, ron bushy etc.
mynewcr250 11/17/2012 7:32pm
11/17/2012 7:32pm
MXBOY2661 wrote:
my NEWCRF250 my 12 ktm 250, w/300sx kit , i use my ignition from the stok 250 sx, n i have the sx head, mike s...
my NEWCRF250 my 12 ktm 250, w/300sx kit , i use my ignition from the stok 250 sx, n i have the sx head, mike s at cycle playgroud did his magic to it, my bike revs to the moon, just as much if not moree than my 250sx all around it has a very usable powerband, i explain it this way it the same way ur 250sx is except it revs way further than ur 250, n has way more torque...the 250sx brought the fun back into mx for me, the 300 makes the smile underneath ur helmet , last alot longer! u can not make a 250 sx run the same regardless if u port , blue print, ron bushy etc.
i believe youre also over at ktmtalk right? you have the 36/39 oval bore carb too right? did you ever run the bike with the stock 36mm and are you able to compare to the 36/39?

thanks man
brocsdad
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brocsdad 11/21/2012 11:35am
11/21/2012 11:35am
Digger29 wrote:
Problem solved Lee. Glad you guys liked the jetting specs cuz I love them. [IMG]http://img.photobucket.com/albums/v350/Diggermx29/MooseAirfilterkit.jpg[/IMG]
Problem solved Lee. Glad you guys liked the jetting specs cuz I love them.
I just started reading the thread and I'm so glad I did. Who makes the filter kit for the KTM 250? I tried googling it and wan't able to find anything.

Can this happen on the other KTM's? My son's 65 has the traditional setup but I plan to buy him a new 2013 85.

Still debating between an RMZ450 and a KTM 250? I'm 42 and my son races so my choice will be more about having fun than winning races.
brocsdad
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brocsdad 11/21/2012 12:12pm
11/21/2012 12:12pm Edited Date/Time 11/21/2012 12:13pm
Found the filter kit!

So do you need to take the air box apart to fit the Moose setup?
Digger29
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Digger29 11/21/2012 1:08pm
11/21/2012 1:08pm
That Moose pic was a generic photo of another brands air filter system. I ordered it & all I got was a new cage almost identical to the Twin Air's cage. It's newer updated billet cage with like 5 long pins that go into the air box & align the cage correctly & that won't let it move at all once you have it in there. It's WAY better than the stock KTM cage but it's not really what I wanted so I'm kind of bummed. The set up I have now will have to do & it seems to be working great.
Digger29
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Digger29 11/21/2012 1:15pm
11/21/2012 1:15pm
My opinion on you debating between the RMZ450 & the 250SX is an easy one. If it's all about having fun & not about winning races I would get the KTM in a second cuz this bike is WAY WAY more fun than riding an RMZ450 or any 450 4 stroke. With 3 little mods & the correct jetting & the FMF pipe & silencer combo my KTM is 450 fast & 25 lbs lighter & you can rebuild it with a butter knife in like 25 minutes.
brocsdad
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brocsdad 11/21/2012 1:51pm
11/21/2012 1:51pm
Digger29 wrote:
My opinion on you debating between the RMZ450 & the 250SX is an easy one. If it's all about having fun & not about winning races...
My opinion on you debating between the RMZ450 & the 250SX is an easy one. If it's all about having fun & not about winning races I would get the KTM in a second cuz this bike is WAY WAY more fun than riding an RMZ450 or any 450 4 stroke. With 3 little mods & the correct jetting & the FMF pipe & silencer combo my KTM is 450 fast & 25 lbs lighter & you can rebuild it with a butter knife in like 25 minutes.
I found a cherry 2010 RMZ 450 with posh pipe, black excel rims, radiator braces etc. with less than 10hrs for $5k. The cheapest 250 I found was $7k and the used ones are bring $6000 plus so you might as well buy a new one. Decisions......

My son races but I really miss riding on practice days. I just ended my divorce and I have custody of my son. It looks like I'm going to come into a little inheritance money so it's time to celebrate with some new bikes.
brocsdad
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brocsdad 11/21/2012 1:53pm
11/21/2012 1:53pm Edited Date/Time 11/21/2012 1:56pm
Digger29 wrote:
That Moose pic was a generic photo of another brands air filter system. I ordered it & all I got was a new cage almost identical...
That Moose pic was a generic photo of another brands air filter system. I ordered it & all I got was a new cage almost identical to the Twin Air's cage. It's newer updated billet cage with like 5 long pins that go into the air box & align the cage correctly & that won't let it move at all once you have it in there. It's WAY better than the stock KTM cage but it's not really what I wanted so I'm kind of bummed. The set up I have now will have to do & it seems to be working great.
Thanks!

What jetting did you finally end up running? I noticed the magazines were recommending a 158 main and if you started pinging go richer.

How do you like the FMF pipe? My son is sponsored by FMF and we get a great discount but I heard the PC pipe was awesome!

Has anyone tried the Dick's Racing Carb mod?
Digger29
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Digger29 11/21/2012 2:33pm
11/21/2012 2:33pm
I have the stock 42 pilot, air screw at 1.5 turns, NECJ needle on the 3rd setting & a 172-175 main jet with the FMF & the FMF shorty 2 silencer on it & it Fn rips & sounds like a 250 works bike. I heard the same thing about the PC pipe but both of the fast experts back here that have the 250SX's are both running the same FMF combo & KTM specs the FMF pipe & sells it through KTM Power Parts so that's what I bought & I couldn't be happier with it. I asked the powers that be about the Dick's Carb mod & I was told not to waste the $400 on it so I didn't.
Digger29
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Digger29 11/21/2012 2:40pm
11/21/2012 2:40pm Edited Date/Time 11/21/2012 2:43pm
PS.. I jetted my bike based on the mags too & it was pinging something awful with a 160 main jet & on a 50/50 blend of Sunoco Supreme 112 octane race fuel & Sunoco Ultra. I then put a 165 & then a 168 & it still pinged so I went 172 & the pinging was gone & the bike sounded different & ran Fn tremendous so that's when I put a 175 in it & that's what I had in it til 2 wks ago when Ron was doing my motor mods & he put a 172 back in it cuz he said it ran better with 172.
brocsdad
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brocsdad 11/21/2012 2:46pm
11/21/2012 2:46pm
Digger29 wrote:
PS.. I jetted my bike based on the mags too & it was pinging something awful with a 160 main jet & on a 50/50 blend...
PS.. I jetted my bike based on the mags too & it was pinging something awful with a 160 main jet & on a 50/50 blend of Sunoco Supreme 112 octane race fuel & Sunoco Ultra. I then put a 165 & then a 168 & it still pinged so I went 172 & the pinging was gone & the bike sounded different & ran Fn tremendous so that's when I put a 175 in it & that's what I had in it til 2 wks ago when Ron was doing my motor mods & he put a 172 back in it cuz he said it ran better with 172.
Wow!

The 172 seems like quite an increase from the stock 158. Normally with race fuel you can go leaner? I just came across a 2011 SX 250 with 5hrs for $5000 so the RMZ is looking a little less attractive.

I plan to buy my son a new SXS 65 and possibly the 2013 85 (he's bugging me for an 85) but I have a hard time paying full retail for myself a bike.
Digger29
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Digger29 11/21/2012 3:09pm
11/21/2012 3:09pm Edited Date/Time 11/21/2012 3:17pm
Try & get a 12 cuz it has linkage & it's a better bike. I forgot to mention that I'm also running it at 32:1 which will definitely be leaner & call for a bigger main jet. My lower end will thank me later :-) 60:1 must be just brutal on the lower end & will definitely shorten the life of it dramatically.
mynewcr250 11/23/2012 6:46pm
11/23/2012 6:46pm Edited Date/Time 11/23/2012 6:51pm
my experience matches diggers...i run the same ratio and i too was pinging with a 162 and 165 at sea level in the sand. it pinged so bad with the 162 that i couldnt get back to the truck fast enough. 165 was better under WOT but still way more than any engine should deal with.

175 main solved it and i will lean out from there. every bike ive ridden in the past needed to be leaned out, the ktm seems to want to be richened up
MXBOY2661
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MXBOY2661 11/23/2012 8:09pm
11/23/2012 8:09pm
U guys that wanna solve ur filter problems, very easy fix, get the loudmouth, best money youll spend. N will never have dirt n the air box again.

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MXBOY2661
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MXBOY2661 11/23/2012 8:12pm
11/23/2012 8:12pm
Can one of u guys teach me how to post my bike pics? Hands down i got the sickest 12 300sx ! Thoses r big words, got something really special to back it up!
brocsdad
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brocsdad 11/23/2012 10:02pm
11/23/2012 10:02pm
MXBOY2661 wrote:
Can one of u guys teach me how to post my bike pics? Hands down i got the sickest 12 300sx ! Thoses r big words...
Can one of u guys teach me how to post my bike pics? Hands down i got the sickest 12 300sx ! Thoses r big words, got something really special to back it up!
Yyou can also create an account with photobucket and copy the img code and past in the post.

or e-mail me the pic and I will post it. mx558tn@hotmail.com
Digger29
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Digger29 11/24/2012 9:18am
11/24/2012 9:18am
MXBOY2661 wrote:
U guys that wanna solve ur filter problems, very easy fix, get the loudmouth, best money youll spend. N will never have dirt n the air...
U guys that wanna solve ur filter problems, very easy fix, get the loudmouth, best money youll spend. N will never have dirt n the air box again.
I just checked out the Loudmouth Intake System & it looks really good & very well made & I wish I saw this before I spent the money on the Moose set up with 6 brand new filters... :-(
Digger29
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Digger29 11/24/2012 9:27am
11/24/2012 9:27am
Rode again yesterday & I let a few buddies ride my bike & they were shocked at how fast it is. I let a guy with a 12 250SX ride it & he just called me & said he needs his motor set up like mine. I rode a buddies 13 300 XC & it's jetted & with the same pipe & silencer as mine & it was a slug in comparison to my bike. My motor hits much harder & has way more bottom end & definitely revs way higher. I didn't like the power delivery at all. 2 of my buddies rode it also & said the same thing.
Digger29
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Digger29 11/24/2012 9:59am
11/24/2012 9:59am
Ps.. for all the guys with the 300 kits. I know it wasn't a 250 SX with a 300 kit installed but I was just curious on how a 13 300 XC compared to my bike is all.
T-Fish
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T-Fish 11/24/2012 12:06pm
11/24/2012 12:06pm
MXBOY2661 wrote:
Can one of u guys teach me how to post my bike pics? Hands down i got the sickest 12 300sx ! Thoses r big words...
Can one of u guys teach me how to post my bike pics? Hands down i got the sickest 12 300sx ! Thoses r big words, got something really special to back it up!
Huge words!

Get some pictures posted!!!
MXBOY2661
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MXBOY2661 11/24/2012 3:35pm
11/24/2012 3:35pm
T fish, yes they r big words, lol! Im computer illeterate, got a pretty sic bike to show off, though, jeez, i cant believe how fn fast digger 29 bike is ! Mike , u need to ride a real 300sx, n not listen to what all ur buddies tell ya, n i forgot about the filter prob u had but look into loudmouth intakes, problem solved, i put it on n it makes filter changes a thing of the past, so easy to change, n wash air box. Oh , n my 300sx will roost all over ur tweaked 250sx! Iol!
brocsdad
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brocsdad 11/24/2012 8:55pm
11/24/2012 8:55pm Edited Date/Time 11/24/2012 8:55pm
I posted pic's of mxboy's bike



Digger29
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Digger29 11/25/2012 6:45am
11/25/2012 6:45am Edited Date/Time 11/25/2012 6:47am
Love your bike! I just bought the powder coat to do my frame orange. I went with a flo neon orange but I don't like the color that came cuz it looks more like a traffic cone neon orange & not the neon orange that I saw on the Langston Racing KTMs at the Southwick National. So I'm going to try another neon orange & if I don't like that one I'll go with the orange like on your frame or Team KTMs bikes. What color is yours anyway? I'm sending out my stock cylinder with a Vertex 300 piston & making my own 300 kit & then well see whats up but as it stands now I'm thrilled to death with the performance of my 250SX with the mods that we've done to it. I'll set it up as a 300 & race it in Florida this winter but I'll have the other top end with me & will be switching it back if I'm not totally blown away how it works. I told you I rode my buddies brand new 13 300 XC on Friday & he has is jetted like mine & has the same FMF pipe & silencer & I wasn't impressed at all. My motor worked better everywhere on the track where I rode it. I know it will be different when I do it cuz my engine we will set the cylinder up identical to mine & of course the SX head & ignition will make a huge difference. I just wanted to feel his new 300 against my 250 & there just was no comparison. The only way that his 300XC could stay with my bike on the staights is if there was rope around my waist pulling it along behind me :-)
MXBOY2661
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MXBOY2661 11/25/2012 7:52am
11/25/2012 7:52am
Mine is the same color as the factorys i believe the color is called p e l 109
MXBOY2661
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MXBOY2661 11/25/2012 8:06am
11/25/2012 8:06am
Brocs dad, thanks for posting the pics for me, i ll give use alil back ground what ur lookin at its a 2012 with a 300sx kit head doneby mike s at cycle playground, oval bore carb 36/39 loudmouth intake, 57mm pegs ,renthol sprocket, d i d chain, mx tech suspension , stiffer springs front n rear, n as we speak my suspension is there right now , getting freshened up, n adding dual sided huck valve , i want more plushness up top n smoother mid stroke n great bottoming with the dual hucks thats what i hope to acheive, with the shock im adding the his new head check valve soppose to be the same as the huckvalve but for the shock. So we ll c cant wait to get it back, hopefully really quick, its gettin really cold hear quick!

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