Screen on air filter cage needed with FI?

4 replies to this topic
  • mch

Posted May 19, 2014 - 01:16 PM


My first 4-Stroke was my 2012 WR450F with fuel injection.  I have a friend who has been telling me to cut out the screen inside the filter cage on both my 07 YZ450 (Non-FI) and my WR.  I have some concerns with doing it because I had a friend who's bike burned up in the early 90's after a backfire from his carb.  I'd be doing this for a chance at better throttle response on the YZ, and just to see if it helps uncork the WR any.



  • funt

Posted May 19, 2014 - 01:37 PM


No toil and twin air make flame resistant elements to use with their high flow cages if you're scared of a backfire burning it up.  I cut mine out but I don't know if it made any difference in performance.  It's hard to cut it all out, there's a lot of tiny pieces left on mine. 

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  • Krannie McKranface

Posted May 19, 2014 - 03:20 PM


If you bike is jetted/mapped correctly, it will not backfire.

  • mc1hd

Posted May 20, 2014 - 08:10 PM


Very little to be gained, not worth the hassle in my opinnion.  After buying a new twin air  and looking at both stock and twin air filters decided stock was best.  Bought two more stock filters and always have a clean one to put in.  As always opinions will be different.  Just mine. 

  • benjar

Posted May 21, 2014 - 12:34 PM


I use the No Toil dual stage with a cage from a YZ250 2-stroke. When I cut the stock WR cage it left sharp strings around it that could get sucked into the motor. The YZ cage comes without the mesh.


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