White Brothers R-4 or Yoshimura?
#1
I want to buy a slip on pipe for my 400EX. I'm going to rejet and modify my airbox also. I've narrowd it down betweent the Yohsi and WB R-4, if any one has one of these slip ons please let me know what you think of it and how it sounds??
2000 400EX
2000 400EX
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