I have a 2004 WR450 that I've had for a few years and has reliable as a stone. Today I drained my oil from my last ride of last year (yeah it sat for a few months, bad me), and I found LOTS of soft metal in there. The oil looked almost like metallic paint, it was so bad. So I think I have a main bearing or something like that that is starting to go. Not a huge deal to rebuild, and now that it's winter, it's a good time, but before I tear into it, I'd like to get a professional opinion. My question is, I'm planning on sending an oil sample to one of the oil analysis services out there and was curious to know if anyone had a recommendation for one? Also, now that I've drained my oil and put in a new filter, I probably need to run it for awhile to get a good enough sample to send out. I didn't save the old oil in a clean container, just drained it like usual. How long should I run it? The last oil in there was in for a week of fairly hard riding and revving the piss out of it in the mountains. I can come close to replicating that on the street, just don't know how long oil needs to be in there to get a reasonable sample for analysis.
The other fairly odd thing is, I didn't see any particulate matter in the filter. I was also not terribly careful, and had it contaminated fairly quickly, and gave up trying to read it. Not really a question there, just a random comment.
Thanks for your help