kdx200 Big Bore/Stroker

Questions and Answers about the best carb and Head mods available for the KDX.
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KAOS
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kdx200 Big Bore/Stroker

Post by KAOS »

Looking at getting a KDX200 (would look for kdx220 but hard enough to get a decent KDX200 in Australia let alone the kdx220). Was wanting to know if you can just get a rebuild kit for the kdx220 to make the engine bigger? Or is there any other way?
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fuzzy
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Post by fuzzy »

Eric Gorr (or another builder) can do a 225cc. A 240cc can be done w/ a sleeve, but the 225 is mucho recommended over that. No stroker crank unfortunately.
'91 KDX 200 Project $300 KDX
'95 KDX 200 Project $600 KDX
'94 WR 250 Always a project
jgas
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Post by jgas »

I am no DXpert, newbie here. But I did ride a well tuned older DX with a steel sleeve-240 kit and FMF torque pipe. It had way more bottom end than a 200, but about the same mid range and top end of a well tuned and piped 200. I think the carb was bored on the 240, but not sure. I remember thinking it would be a great motor for very technical terrain on a wet day, but not a "ripper" motor at all. It was very easy to ride, reasonably fast, you could easily ride a gear high unlike a 200. Good, but different.
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fuzzy
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Post by fuzzy »

Never doubted the 240, but would never give up my nicasil bore for it. I'm sure a Gorr 225 is a tractor.
'91 KDX 200 Project $300 KDX
'95 KDX 200 Project $600 KDX
'94 WR 250 Always a project
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Julien D
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Post by Julien D »

I'd ride the 200 as is first before deciding to big bore it. I don't find my engine lacking in any situation. I had more problems with the suspension than the engine, so sink your money in there first. The suspension mods will help you ride better and faster on the KDX than any engine mods you may want to do, I promise.
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fuzzy
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Post by fuzzy »

Absolutely!
'91 KDX 200 Project $300 KDX
'95 KDX 200 Project $600 KDX
'94 WR 250 Always a project
BobbyZ
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Post by BobbyZ »

my 93 is 2mm overbore (guess its a 225 as its maxed) with a mild frp port job,pc pipe and boysen reeds was a absolute beast.There where many times all 250 mx'ers saw was the back fender :butthead: but I cant agree more with those that say work on the suspension 1st,my friend who used to ride in top level pro 125's cried at how bad the bike was suspension wise with the power it had.
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