'99 XR400 gets UPGRADED USD forks

This video covers a fork/shock USD (upside down) upgrade for a 99 XR400.

I took the front suspension assembly from a 2006 Honda CRF250 and installed it on the XR400 using a conversion steering stem from XR's Only and a Pivot Works bearing kit.

Part Numbers:
Steering Stem:
XRSS-CONV
Steering Stem Nuts:
HO53229-MN1-670
HO90304-KA3-710
Pivot Works Bearing Set:
PWSSK-H04-420

Also bought this stuff for a 2006 CRF250 off ebay:
set of front forks
full triple tree/headset unit
front wheel/tire combo

There are a few ways to do this conversion.
You can buy the steering stem from XR's only that fits the CRF triple tree and allows you to use stock XR headset bearings. (easiest route)
You can buy some custom bearings that will fit the stock CRF250 steering stem and the races will fit the XR. (the bearings are smaller though and require spacers otherwise the stem will be loose top to bottom)
You can machine the CRF stem to a smaller diameter so that the stock XR bearings will fit the CRF stem. (cheapest if you have access to a lathe and the knowledge to use it)

For the custom bearings you'll want to find some with measurements 30mm ID X 47mm OD X 14mm. I got these measurements and the source from a post on thumpertalk with a write up from 2009 titled "XR400 crf fork conversion complete". I bought some bearings by emailing zoran at twfracing dot com. The bearings were about $45ea plus shipping when I got them in 2022.