Re: Cleaning the crank case - 1996 Polaris XLT 600
There's not much room to get into the base (past the crank and rod), you could flush it with gas but you risk washing stuff into the bearings if there was none there to begin with. Additionally, the oil pump drive mechanism is in the base of the center cylinder, I wouldn't want to get stuff washed into that.
You can get at the mount bolts from under the machine. Then you can lift the base and the aluminum mounts, and the front mount brackets out with it. I found on my old 650 that by taking the front mount brackets out I avoided changing the motor alignment (although I still double checked it). Dealer should have the manual, try Dennis Kirk, too.