Hi from Oklahoma, new to this

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Doc76
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Hi from Oklahoma, new to this

Post by Doc76 »

Hello from Oklahoma, just found a great 92 KDX 250. I am super excited to learn about it this is my first real two stroke that's an actual big boy bike. The guy I bought it from had meticulous records and was well cared for, I want to keep it that way. Are there any particular threads that are recommended I'm looking to maybe lean it out a bit and increase performance a bit. I'm running 42 and 165 on my jets and second position from top of my needle. I ordered some boyesen power reeds and was thinking I might go with a 40 and 160 when I install them. Anyway I'm really glad to be here and thanks for any input I'll keep reading threads and trying to soak it all in.
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scheckaet
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Hi from Oklahoma, new to this

Post by scheckaet »

welcome.
check my sig for jetting guide.
royadams
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Re: Hi from Oklahoma, new to this

Post by royadams »

I run a 38 155 #6 slide and a leaner needle in mine. It has a fmf fatty pipe, boysen reeds and the air box opened up. What I've read most run 38 or 40 155 or 158 #6 slide and leaner needle. This is just a start all bikes are different and require some work to get dialed in
Doc76
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Hi from Oklahoma, new to this

Post by Doc76 »

Thanks for all the great info and especially the links I've been reading all day awesome site
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SS109
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Hi from Oklahoma, new to this

Post by SS109 »

Welcome! The KDX250 is a beast! :supz:
Youtube Channel: WildAzzRacing
AZ State Parks & Trails OHV Ambassador - Trail Riders of Southern AZ
Current KDX: '98 KDX220
Old KDX: '90 KDX200 -White/Blue
'11 GasGas EC250R
Doc76
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Location: Mustang Oklahoma

Hi from Oklahoma, new to this

Post by Doc76 »

Alright I've been reading and tinkering all last night and morning installed 40 and 158 jets (because I had them here) there is a noticeable improvement, but I seem to have a spongy or soft spot at about 1/8 throttle. Really a dead spot just a hiccup. If I rip it to WOT fine, accelerates smooth and works great only notice it when it's rolling at idle speed then accelerate very slowly. Any way I was thinking about removing the snorkel or opening up the air box somehow to see if that makes any difference. I am not at this juncture doing anything undo able just to play it safe. Thanks folks. Any suggestions are greatly appreciated.
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SS109
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Hi from Oklahoma, new to this

Post by SS109 »

Kaw installed the wrong slide in the KDX250. You need to find a #6 slide, or modify yours, as it will clean up a lot of jetting problems.
Youtube Channel: WildAzzRacing
AZ State Parks & Trails OHV Ambassador - Trail Riders of Southern AZ
Current KDX: '98 KDX220
Old KDX: '90 KDX200 -White/Blue
'11 GasGas EC250R
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