60039005100. That is the PN of the ignition rotor including freewheel. The cheapest I found it is $375.00. Because my bike is a 2004, it does not have a torque limiter, and therefore is not eligible for the 100% free dealer installed upgrade to the new totque limiter. This really sucks because I had the parts in my hands at my local shop, and he said he could do it while I wait, again, for FREE!!!!! (he thought I had an '05). Now, instead, I have to pull it apart and see if there are any bad gears. If not, then it's my freewheel assembly mentioned above. The freewheel actually acts as a one way bearing. It looks like a link chain, (at least on dirtbikes with electric start). Cool setup if it's working right. Bottom line, it makes the exact same torque limiter clunking noise with the throttle open as described in the other threads. Has anyone had to replace any of the gears or the freewheel on a 2004??? Is my situation rare for a 03/04? At least the gears are visually accessible once I get the cover off. I'll be doing the triage tomorrow.