450 Air box mod

10 replies to this topic

Posted November 25, 2005 - 08:02 PM


I am doing my mods on a 03 wr 450. I pulled off the seat to pull off the lid like they say to do but that is where the batterey tray is. What are you guys doing for this?

  • gregwr450f

Posted November 25, 2005 - 10:57 PM


I think you are referring to the snorkle, (your question is poorly worded) you can remove the snorkle if it has one and open up the right side of the air box where the cut out marks are.

  • Matty05

Posted November 26, 2005 - 04:14 PM


Yeah, just take the right numberplate off and cut away.

  • paulzarr

Posted November 27, 2005 - 12:34 PM


Your 03 WR450 airbox should be exactly like my 06 WR450 airbox. The following is from the Yamaha AIS Removal Kit installation instructions:

"Remove the intake silencer. This will allow unrestricted air intake.
• Remove the battery.
• There are 2 pop-rivets used to hold the battery strap bracket that block the intake silencer from slipping out. Gently pry the battery box back until intake silencer can be removed.
Note: Use caution when doing this as you can break the battery box by using too much force."

It slides right out if you insert a medium screwdriver between the snorkel and the strap bracket. Just use your thumb and index finger to pull the snorkel up and out once the two rivets are no longer in the way. Take your bike for a spin and then decide if you want to do the airbox cut-outs also.


  • motormouth

Posted November 28, 2005 - 10:02 AM


I spent the better part of Saturday talking to the local idiots at my Yamaha dealers serching for the AIS Removal Kit. If nothing else it was entertaining to see the dumbfounded looks I got. Finally got one guy to go to his computer and learn that it was a valid item, that they dont have....go figure. I logged on to TT today and odered it immediately for less that Yamaha quotes it. ThanksTT.

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  • msgbean

Posted November 28, 2005 - 03:55 PM


the 03 doesn't have cuttout marks. You have to just start cutting.


Posted November 28, 2005 - 04:41 PM


Whats the AIS removal kit?


Posted November 29, 2005 - 04:30 PM


Does anyone have a picture of the cut outs on a 04-05?

  • foxomatica

Posted November 29, 2005 - 07:59 PM


Just remove the right side number plate and you can't miss them

  • hybridz77

Posted November 30, 2005 - 06:58 AM


On the right side of your air box behind the number plate (which is riveted at the rear of the air box, you can just bend the number plate back or remove the rivets its up to you) Behind number plate you will see the air box with a flat surface on the upper half and a smaller flat surface on the lower half. I only cut out the upper portion because I opted to bend back #plate, and for deep water crossing. Only remove material on the flat surfaces as the other contoured shapes are part of the structure I believe!


Posted November 30, 2005 - 07:47 AM


Great, thanks for all the help.


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