WR 450 vs YZ450 feedback
I have a Timbersled Kit on a 2005 WR 450f and my buddy has the same on a 2005 YZ. The headlight and the e start is a definite bonus. My WR is " uncorked" and performs fine with the track kit. My bike is also much quieter which I prefer. The airbox is a bit easier on the WR to snowproof as it is not wide open on the top like the YZ. The performance difference in this application is immaterial IMO. I recommend that you contact JD JETTING for some guidance on getting your jetting right for your temps and elevation as stock jetting for either the YZ or the WR is a bit lean in any case and particularly so for winter use. Also, I recommend that you run ALL vent lines ( fuel and oil) into the airbox to avoid clogging. We ride at Sea level to 4500 ft..... performance will vary due to temps and altitude, but won't spoil your day. Once you have electric start, it is tough to go back.