WR 450F Spark Arrestor

2 replies to this topic
  • ossa98

Posted March 11, 2003 - 11:30 AM


Since the WR450F 2003 stock muffler isn't stamped, U.S.F.S. approved. What happens when you show up to a race that requires an approved spark arrestor?

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  • tctrailrider

Posted March 11, 2003 - 02:54 PM


Not sure of the answer to your question but I have a 00 WR400 and an 02 WR426 and neither have the Forestry approved stamping on the pipe. Both have the stock pipes. Sure seems the language should be there.

  • r1superstar

Posted March 11, 2003 - 05:40 PM


Yamaha's website states that the 03' WR450 has a spark arrestor. Now does it have to be stamped U.S.F.S.? I don't know.

I'm in the same dilemma with my 02' WR426.


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