pro-circuit 304

1 reply to this topic
  • Darren_Santilli

Posted January 26, 2001 - 09:59 AM


I recently bought a used exhaust for my 2000WR and was told it was a "pro-circuit T4", but its actually a "pro-circuit 304 factory sound" system, meant for a '99 YZ.

Is it still ok for my bike?


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  • Al_in_Sacto

Posted January 26, 2001 - 01:41 PM


I've got the same 304 system on my 99 WR400. It works great but no better than any other aftermarket system. Unfortunately, Procircuit does not offer a spark arrester for the 304.

I made my own SA so it now passes the "stick test".

I tried to fit other manufacturers exhausts (FMF, WhiteBros, etc) to the header, but the 204's header angle does not match up.

Hope this helps.


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