WR parts on YZ

[SteveKing84]

Anyone put a WR exhaust on a YZ? I'm really contemplating putting a 05 wr450f exhaust on my 04 yz450f. I need the spark arrestor and I'm not too worried about the power loss. Would rejetting be needed?

[DMC707]

Re-jetting is needed almost when you change brands of air filter oil on these things --- LOL . I would assume a re-jet would optimize things

[Moscow Roost]

Not certain about WR to YZ, but I took a full exhaust off an 09 YZ and put it on my 08 WR and had no issues at all (except for more power). I wanted the shorty muffler and went with a PMB end cap for trail riding. If all you want is the spark arrestor for your YZ, buy a PMB from RM MC/ATV. http://www.rockymountainatvmc.com/p/44/54/207/905/665/23208/Pro-Moto-Billet-Endos-Spark-Arrestor-End-Cap