[KDX200H] 97 KX250 fork
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[KDX200H] 97 KX250 fork
Hi,
I'm looking for a simple solution for the USD fork swap on my 96 KDX 200. Here in Belgium KX 500 are fairly common but finding a fork alone it's not easy. And I prefer to don't do the stem swap to keep a fully working original KDX fork with triples as spare parts.
I'm planning to buy :
- a KX 500 lower triple 1998-2004 from eBay US
- a complete KX 125/250 1996-2001 frontend (fork, upper triple, wheel, brake, etc) here in Belgium.
For all these years it's a 46mm Kayaba USD fork.
So I'm right ? I will have all the parts needed for a direct swap ?
And what about the geometry with the longer KX fork ? Is it possible to pushed up the fork in the triples ?
Thanks :)
I'm looking for a simple solution for the USD fork swap on my 96 KDX 200. Here in Belgium KX 500 are fairly common but finding a fork alone it's not easy. And I prefer to don't do the stem swap to keep a fully working original KDX fork with triples as spare parts.
I'm planning to buy :
- a KX 500 lower triple 1998-2004 from eBay US
- a complete KX 125/250 1996-2001 frontend (fork, upper triple, wheel, brake, etc) here in Belgium.
For all these years it's a 46mm Kayaba USD fork.
So I'm right ? I will have all the parts needed for a direct swap ?
And what about the geometry with the longer KX fork ? Is it possible to pushed up the fork in the triples ?
Thanks :)
Last edited by ced64k on 01:57 pm Feb 19 2015, edited 4 times in total.
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Re: [KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
1996 and 1997 KX125 / KX250 forks will fit those clamps.
Try not to focus on the diameter of the chrome inner tube, go with the outer tube diameter where it fits into the triple clamp.
For best results, the KX forks need to have the travel shortened internally with a travel limiting spacer installed.
Try not to focus on the diameter of the chrome inner tube, go with the outer tube diameter where it fits into the triple clamp.
For best results, the KX forks need to have the travel shortened internally with a travel limiting spacer installed.
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- ced64k
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Re: [KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
Thanks Jason. So I'll try to find this 96/97 fork.
Is there a database or something to know the outer diameter for each year ?Jason wrote:Try not to focus on the diameter of the chrome inner tube, go with the outer tube diameter where it fits into the triple clamp.
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Re: [KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
No need for a database, just buy about every year fork and clamp off ebay like I did.
It varies, but some years are a one-year-only deal, and some are the same for 2 or 3 years. Some change the next year on just the top.
It varies, but some years are a one-year-only deal, and some are the same for 2 or 3 years. Some change the next year on just the top.
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Re: [KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
KX 250 97 forks should be mine soon. But the KX 500 triple tree are VERY hard to find. Nothing on eBay. Nothing at french or uk motocross breakers. I'll have to bring myself to cannibalize my KDX stem with KX 250 lower triple…
Last edited by ced64k on 04:19 am Dec 11 2014, edited 1 time in total.
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Re: [KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
Just buy another KDX lower triple and cannibalize that stem.
newbbewb wrote:^what he said.
*side note...I'm drunk, so try to read what I'm trying to say, instead of what I actually typemasterblaster wrote:Man 6 riders you rock.
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Re: [KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
Soooo, these KX forks changed upper tube diameter almost yearly? wow.
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Re: [KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
Not almost yearly.
Inner cartridges got bigger at times, outer tubes got bigger at times
91
92-95
96-98
99-01
02
03-08
that is for 125/250 upper clamps
91 is due to offset, not size, if anyone wants to get the HMMM moment
Inner cartridges got bigger at times, outer tubes got bigger at times
91
92-95
96-98
99-01
02
03-08
that is for 125/250 upper clamps
91 is due to offset, not size, if anyone wants to get the HMMM moment
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Re: [KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
- KX250 97 forks received
- KX125 97 triple tree ordered
- RB Designs spacer ordered
Now the wheel ? /invoke Jason
I can get a KX125 2000 wheel for a fair price, do you know if it fits the KX250 97 fork ? I have the axles for the 2 forks.
- KX125 97 triple tree ordered
- RB Designs spacer ordered
Now the wheel ? /invoke Jason
I can get a KX125 2000 wheel for a fair price, do you know if it fits the KX250 97 fork ? I have the axles for the 2 forks.
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Re: [KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
I can not remember on the wheels. Maybe someone else can help on that. Sorry.
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[KDX200H] KX 125/250 96-01 fork + KX 500 lower triple
I checked and 93-98 KX125/250 have the same reference for the front axle but starting 99 it's different. Maybe it's better to look for a 93-98 wheel.
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Re: [KDX200H] KX 250 97 fork + KX 125 97 triple clamps
Finally I got all the stuff:
- KX 250 97 fork
- KX 250 97 wheel
- Stem swap made on a KX 125 97 triple clamp
- RB Designs stem spacer
Next step is to bring the fork to my local motocross shop. I would like a complete revalve/rebuild. But for the KDX/woods riding tuning, I'm not sure what I have to ask. I read things like shorten the fork, softer springs, etc. How can I know how many inches it should be shortened ? The bike is completely disassembled so I can't mesure it with the standard fork.
For the springs, when I try the Racetech calculator I choose Trail/Enduro, dirt novice, standard height, the recommended fork spring rate is 0.436 kg/mm.
For the rear shock the recommended spring rate is 5.402 kg/mm. Do I need to change something on the stock KDX shock ? A rebuild will be sufficient ?
- KX 250 97 fork
- KX 250 97 wheel
- Stem swap made on a KX 125 97 triple clamp
- RB Designs stem spacer
Next step is to bring the fork to my local motocross shop. I would like a complete revalve/rebuild. But for the KDX/woods riding tuning, I'm not sure what I have to ask. I read things like shorten the fork, softer springs, etc. How can I know how many inches it should be shortened ? The bike is completely disassembled so I can't mesure it with the standard fork.
For the springs, when I try the Racetech calculator I choose Trail/Enduro, dirt novice, standard height, the recommended fork spring rate is 0.436 kg/mm.
For the rear shock the recommended spring rate is 5.402 kg/mm. Do I need to change something on the stock KDX shock ? A rebuild will be sufficient ?
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Re: [KDX200H] 97 KX250 fork
Measure the center of the axle to the top of the cap on the KDX and then on the KX, then report your results.
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Re: [KDX200H] 97 KX250 fork
In general, KX forks are longer than KDX forks, so it throws the geometry off and if not pulled up super high, they chopper the KDX out.
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