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Posted by: yfz27

I'm going to try and run my first WORCS races this year. Hopefully Milford and the two in WA. I wanted to know what pipes people were running to meet the sound restrictions? I've always raced MX and am looking to replace the Sparks exhaust on my YFZ with something acceptable for WORCS. Thanks

Posted by: GWTT

Im currently running motoworks on my 06' yfz with quiet core. passed 97 db's. I just repacked it for round 2. I ran LRD at havasu last season with a quiet core and was 95db's. sparks would be tough to pass sound.

Posted by: yfz27

Yeah that's why i'm getting rid of the Sparks. It tested at 101 with their "quiet" tip and spark arrestor in.

Posted by: race proven

Motoworks has a new pipe that will pass sound.

Posted by: adrenalinefreak

My FMF Factory 4.1 pipe passed with 96 with no cores or spark arrestors!

Posted by: daddio

My sparks passed twice last year. Just put an old wore out seat on it.