'09 part # 34P-85540-00-00
'08 part # 2S2-85540-B0-00
'07 part # 2S2-85540-70-00
'06 part # 2S2-85540-00-00
I've got an '06 header with a Pro-Circuit T4 slip-on for my bike, I've heard that the '06 ignition might put a little more power out in the mid-range. I'm assuming the ign. timing is the difference between the two, and wondering if it's worth the bother.
Edited by crf450319, March 04, 2010 - 09:34 PM.