Thousands of posts and you can't do a search?
I'll be happy to provide you the search topics I used and the URLs to the (many, many fruitless) search results they yielded if you like; both on here and Google/Bing. I found precisely dick for information on the 900/600 wheel fitments.
Sites with specifications don't tend to list wheel spacing/offset, disc bolt patter, weight or axle diameters. I've still yet to find any place that lists the weight of a front and rear 954 wheel and a front and rear RC-51 wheel.
Luckily I did find some info on the RC-51 wheels, but even then, some pictures show them with 5-spoke wheels and some with 6. Which is it???
The 900rr wheels won't work. Main reason, your bike has very large discs, with different mountings than 900rr wheels.
Ahhhh...different mountings. The disc size itself shouldn't matter as that would be determined by the caliper mount on the fork, but if the disc bolt patterns don't match up then I'm s.o.l. there.
Supply and demand. Lots of people want RC51 front wheels, fewer want the rear wheels.
I understand supply and demand, however that doesn't explain the reason why more people want front wheels. Most people buy both wheels when they buy a wheel set.
-Were there a bunch of accidents with the RC-51 that ruined the front wheel but not the back?
-Did a bunch of people buy an RC-51 with a 954/1000rr 3-spoke front wheel, and what an actual RC-51 wheel?