As the title states, this is a build for the upcoming Barn Find Open being put on by Red Bull & Carson Brown at Oak Ridge MX in Iowa.
I traded a 04 YZ125 for this 1997 XR400 that has a maximum of 15 original hours. Wanting to build somewhat of a 4 stroke nationals inspired build without opening the engine up, and while keeping some of the XR charm as I plan to eventually put a plate on this and use as a dual sport rig around town and on the road as an outside sales rep.
Below is the “plan”, or at least the one in my brain:
- suspension tuned & set up
- Fender bag (can’t be an XR without it)
- Big carb or Lectron big carb
- Top clamp for 1 1/8th bars
- Skid plate
- Some vision moto graphics
Tires and maybe do wheels as well
I am also looking for any advise on gearing or tips and tricks on these XR400’s. Bike runs strong but needs a carb clean and has a throttle sticking feeling but only when it’s running.Stoked to get this one going🔥


cracking find.
That must have been a clean barn!
Nice barn find! Looking forward for the updates!
Any progress on the XR4?
The Shop
Luxon 4-Post Bar Mounts
$189.95 - $239.95
DeCal Works Huge Plastic Inventory of UFO and Polisport kits.
Looks like he finished it, and as a bonus, sold it to Carson brown at the barn find event
👍
Time got away from me, but I did finish this one up & THE Carson Brown bought it from me at Barn Find Open.
Did a Mikuni carb upgrade (which Carson hated funny enough lol).
PC Slip on, plastics, mark at Vision Moto crushed the graphics kit. Motion Pro throttle assembly w/ twinwall bars, odi grips, a full set of KKE wheels with Dunlop AT-82’s. Did the airbox mod for some free HP
Coming soon...a video of Carson Brown on your ex-XR in the whoops!
That bike needs a pumper carb... totally changes it. But has to have the right needle. Thumpers only used to sell one for that machine. Fork likes a 43 KG springs, 6 shims left in the forks, 6 mm preload. Scott Summers ran this setup at a National. Shock needed work too.. but the pumper carb with the right needle woke it up a ton.
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