I'm also a Satria owner...currently using Mivec rs nose cut...never had problem with the Police...for me just use the part if u want to...try to avoid the road where JPJ always used for ops... :)
many single scoll owner upgrade using after market like tomei extractor or SYMS extractor or xxxx brand but no more bubble sound liaw!
any one using after market extractor but still got strong bubble...