Im thinking of doing a Harescramble for the first time, and it says you HAVE to have a spark arrestor on your bike or you cant race. I have a pro circuit platinum pipe with the R304 silencer. Any ideas of a silencer with a spark arrestor that will not plug up the bike? I go to the track more than woods and dont want to lose any power. Riding a RM125, just wanting to try a HS because I love riding woods.