KX500 Chassis Setup for motocross?

yamathumb
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Redding, CA, USA
12/26/2025 9:15pm

Apparently...cuz I didn't have to do anything with the wheel spacers 

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cwtoyota
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Tacoma, WA, USA
12/26/2025 9:45pm
yamathumb wrote:

Apparently...cuz I didn't have to do anything with the wheel spacers 

Most bikes I've measured are 190mm or 192mm between fork tube centers.

late model Kawasaki clamps are 190mm center to center.
KTM are also 190mm.
YZs (before KYB 48mm AOS/SSS) are 190mm
YZs and YZ-Fs with 48mm AOS/SSS forks are 192mm

It's worth checking and comparing to the 192mm Yamaha spec since your wheel could be off-center by a millimeter or two.
The left (brake side) wheel spacer is the one that locates the wheel.
 

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Luxon MX
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Fantasy
12/27/2025 7:55am
yamathumb wrote:

Apparently...cuz I didn't have to do anything with the wheel spacers 

cwtoyota wrote:
Most bikes I've measured are 190mm or 192mm between fork tube centers.late model Kawasaki clamps are 190mm center to center.KTM are also 190mm.YZs (before KYB 48mm...

Most bikes I've measured are 190mm or 192mm between fork tube centers.

late model Kawasaki clamps are 190mm center to center.
KTM are also 190mm.
YZs (before KYB 48mm AOS/SSS) are 190mm
YZs and YZ-Fs with 48mm AOS/SSS forks are 192mm

It's worth checking and comparing to the 192mm Yamaha spec since your wheel could be off-center by a millimeter or two.
The left (brake side) wheel spacer is the one that locates the wheel.
 

Honda is 192

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OldTech
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Decatur, AL, USA
12/27/2025 8:55am
yamathumb wrote:

Apparently...cuz I didn't have to do anything with the wheel spacers 

So, what are you going to do with the steering stop?

The Shop

yamathumb
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Redding, CA, USA
12/27/2025 9:57am
yamathumb wrote:

Apparently...cuz I didn't have to do anything with the wheel spacers 

OldTech wrote:

So, what are you going to do with the steering stop?

Fab one up and Tack it on. May even just tap a couple holes in the stock stop and bolt it on there. It's close enough to use the honda clamps nubs.

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mxbarnhouse
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YUMA, CO, USA
12/27/2025 4:12pm
yamathumb wrote:

Apparently...cuz I didn't have to do anything with the wheel spacers 

OldTech wrote:

So, what are you going to do with the steering stop?

yamathumb wrote:
Fab one up and Tack it on. May even just tap a couple holes in the stock stop and bolt it on there. It's close enough...

Fab one up and Tack it on. May even just tap a couple holes in the stock stop and bolt it on there. It's close enough to use the honda clamps nubs.

Trick engineering makes a billet stop for a fairly reasonable price

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Sundeen
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Corona, CA, USA
1/29/2026 9:37pm
I've been playing hell trying to find a set of billet triple clamps for this 2004 kx500 build I dubbed the nickname "the terrifier". It's one...

I've been playing hell trying to find a set of billet triple clamps for this 2004 kx500 build I dubbed the nickname "the terrifier". It's one of my personal bike builds and actually building it in memory  and honor of Cameron Niemela (prymemx). 

Anyways I'm wanting to run 2012 kx450f forks, basically the same as the popular kyb sss forks on the yz. 

I heard Gary emig passed away who made custom stems to press into modern clamps, same with applied racing the owner also made custom stems but passed away. 

Mcs moto in Australia was supposedly running a batch of kx500 clamps but haven't heard much from them, as well as a buddy of mine who has a kx500 build and asked about their batch of kx500 clamps.  I tried contacting Jonathan Bell (KXP) and hes out of clamps,  kx guru racing team no one wants to get off a set of clamps. 

So basically I'm trying to find a set of billet kx500 clamps for this special build of mine, where I can run the more modern forks. Any suggestions or thoughts to making this happen?

cwtoyota wrote:
When I decided to do a front-end swap I never really shopped around for clamps or a stem. From the start, I knew I wanted to...

When I decided to do a front-end swap I never really shopped around for clamps or a stem. From the start, I knew I wanted to design and mahcine my own parts. It sounds like you know more about the available products and the market for KX500 parts than I do. Since my KX500 was a personal project that I wasn't in a rush to complete, I fit the custom work into my production schedule between customer jobs.

Currently, I'm too busy to set up and manufacture triple clamps and it's unrealistic to think I'll be able to do them in 2026.
It takes time to create production-worthy fixtures and necessary changes to setups and programs.
It's not out of the question for the future, but currently I have some big plans for 2026, so I don't want to make any promises.

I have considered doing a production run of steering stems that are compatible with late model KX-F / KX and YZ-F / YZ triple clamps.
I have a proven design that a local-pro machinist friend is running in his bike with KX250F clamps and Yamaha forks.
That's a product that I can manufacture from material I keep in stock for other products. Also, a stem doesn't require special tooling or special fixtures, so I wouldn't mind making up a handful of them and selling them through my suspension components business.  

https://dialedmfg.com

I have some larger wholesale orders in the shop for non-moto related customers right now...  
When I have some free machine time coming up, I'll keep the KX500 stems and stem nuts in mind for spring or summer of 2026.
 

Following…. I picked up a kx450 2018 and have a 1990 kx500. All I need is that stem machined…

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