maxi Posted March 5, 2007 Share Posted March 5, 2007 hello everybody. i might be buying a fmf exhorst for my yamaha yz 85 however i dont know if it is worth it because them yamaha ones seam fine. it is really pointless buying one if it dosent increase the power. cheers maxi Link to comment Share on other sites More sharing options...
Willenium Posted March 7, 2007 Share Posted March 7, 2007 Should find it revs harder. Definitely improves performance. Link to comment Share on other sites More sharing options...
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