Riding a Yamaha XT250 or WR250R/X?
 
You’ve probably noticed that odd tangle of hoses and that chunky valve hanging off the side of your engine. That’s the Air Induction System (AIS)—it’s there to help meet emissions standards by injecting fresh air into the exhaust to clean up unburned gases.
 
But if you’re dialing in your bike for off-road performance, you might want to clean things up a bit.
Our AIS Delete Kit lets you safely remove the stock air injection system, shaving over a pound of weight and making room for a cleaner engine bay. You’ve seen this before—you know the drill.
 
Why Remove the AIS?
Weight savings – Drop over a pound in minutes.
Less clutter – Cleaner, simpler engine layout.
Improved tuning – Especially helpful with aftermarket exhausts.
Better throttle feel – Get more precise fuel/air delivery when tuning your bike.
 
What’s in the Kit?
Machined billet aluminum block-off plate – Reuses your OEM gasket for a snug, reliable fit.
Rubber cap – Seals off the airbox spigot like it was never there.
 
Quick & Easy Install
No tuning needed, just bolt it on, plug the hose, and hit the trail. If you're running an aftermarket pipe or adjusting fuel maps—this is a key step.
 
For off-road use only. You know the deal.