FYI - I just spoke with Kirk at Bardwell... He looked up the e-cam part numbers for the YZF450 and WRF450: YZF = 5TA-12180-00-00 WRF = 5TJ-12180-10-00 The first 3 digits is the bike's model, the difference is the 10 vs. 00 which is supposed to be a change. This verifies that the 2 e-cams are different! YamaFreek tried YZ timing his 03 WRF's e-cam and it won't start, while Toby_S tried WR timing his 03 YZF e-cam and that worked. I bet the 03 YZF250 and WRF250 part number will have a similar change: YZF250 = 5UL-12180-00-00 WRF250 = ???-12180-10-00 Rick Kienle - can you confirm the 250F part number with your PDF files?