Coming from 4 summits, 2 were mods, still own four doos. And now a Pro Poo, and made a good pass tearing through it after purchase. Buds own RMK's, so I'm not unfamilar with the brand. Here's what I can tell you from experience:
Clutching - stock, all you have to do is change the flyweights for MI to WY. It came stock with 10-62's (62 gram), and your dealer or you should be running 10-68's for MI. I suggest you pick up 10-60's for the Snowies, especially if it's not broke in, and bring your 10-62's. Very easy to change weights. Just need a pry bar, sliding half block, allen and open end wrench, no need to pull clutch or sliding half, unlike doo to get at the pins. You can get a pry bar and block from Goodwin in a kit. First timer - remember to pull the belt off before you use the pry bar to close the primary. No changes to secondary required.
Chaincase - it's easy compared to the XP, not as easy as the Rev. Allen drain, allen screw fill. Takes less than a doo. Change fluid often on the RMK. Check chain tension carefully. Harder to adjust than a doo, but with the smaller stock can, it's not too bad. No reason to pull the can. FYI, many/most allens on the RMK are SAE, not metric. (On a doo, the only SAE is the drain allen).
Break in - hours about as stated, not as defined as the doo programmed timing advance. Plugs are up to you, but the thing runs pretty clean, even with oil in gas. I'd suggest staying away from iridiums for now, unlike the CFI-4, but dropping in new wouldn't hurt.
Check your oil line for a bubble in the line out of the oil tank. Very easy to remedy by pulling the line off the tank, and freeing the tank, of course, and manually bleeding.
Track will stretch lots during breakin. Be prepared to tighten.
I noticed lots of potential wiring and some hose rubs when I went through mine. Many zips and tape ups to bulletproof it. The harness design and execution is not impressive, probably the weakest part of the sled's design, they should have figured this out with the Rush. poo really needs to wake up here and redesign it for their vendor and servicing. Incredible chassis design. Expect to fall in love with sledding even more.
