I have a question about removing the stock air box on a 85 250r, and adding an aftermarket filter (K&N) do you guys recomend this or will this cause problems. Thanks for your help

 

if you're not in extremely wet conditions, this won't cause a problem, as long as you take time to find the exact right filter to attach to your carb boot. If you simply remove the air box lid, you'll likely get just as much flow as you would by completely eliminating the airbox...plus you get the bonus of splash protection that you wouldn't get if the box was gone altogether.

 

Like franke said, if it's wet don't do it!

If you do it's easy to get the ESR Kit. It's around $45 for it all.

 

use k&n with your stock air box just take lid off, box makes a good low pressure area