I live on a large lot that backs up to a small patch of woods. I would like to build an arena cross track behind the house to ride from time to time . I machined a plug with a 3/4'' opening and pressed it into the opening of the silencer on my 2010 yz 450. It is now much quieter, more like a utility four wheeler. Is there any danger of having too much backpressure? I would hate to blow out a crank seal or head gasket. Is there a better way to get the sound down to a level that the neighbors could live with? Thank you for any help.