WR450 Exhaust Insert
Posted April 30, 2003 - 05:05 AM
Posted April 30, 2003 - 05:55 AM
The solution I used cost under $70, will work with US or CAN bikes and can be modified for sound/ power within a few minutes. It's also USFS spark arrestor certified. It's the old SuperTrapp solution.
Cut off the end of the muffler along the inside (towards the engine) of the weld. Saw off slowly as stainless steel cuts better that way. Tap in a Supertrapp 4" standard insert, part way(cut off part of the screen so it will go in the muffler), mark the three holes, remove the insert and drill the holes. Reinstall the insert and bolt on. I use 6 disc's and it is a reasonable compromise between sound and power. More disc's for closed track and less for quiet. At 4 disc's, the power suffered a lot.
I bought my parts at mxsouth.com:
#10-772 Pro series core kit $33.50
#10-770 Diffuser Disc 4" 6 pk (comes in a 12 pack too)$15.09
#10-423 Strpp Stnls end cap 6bolt (spark arrestor) $17.25
Buy the bolts (US)at a hardware store for about $5.
This will work for 2001 to 2003 WR's as I have done this to only those years. As long as it is a standard 4" pipe, the insert taps in perfectly.
Posted April 30, 2003 - 10:12 AM
Posted April 30, 2003 - 12:05 PM
Posted May 04, 2003 - 02:48 PM
Posted May 04, 2003 - 03:54 PM