Taken from my '97 XLT RMK Owner's Manual
XLT RMK has ACCS (altitude compensating carburetion system) SKS has regular carb system (jet for altitude)
133.5 x 1.5 " paddle track stock on RMK, optional on SKS
some other differences in width and rear suspension mountings also.
Another great spot for info I always refer to:
http://www.wheatfarm.com/snowmobile/info/polaris-sled-faq.pdf
Remember as far as handling goes, this is a 13-year old sled. What was considered respectable then is light years away from todays sleds. I'm still trying to get mine set up right, but I love my XLT.
Triple pipes wake this motor up but do a lot of research on these motors considering the crankshafts. There were a number of XLT motors that left the Fuji engine factory with undersize oiling holes for the PTO side bearing, and triple pipes will increase the stress on this spot on the crank. It was'nt until the late '97 model engines with a fourth oil line going directly to the outside bearing by the clutch and a redesigned crank and cases that fixed the problem.
My RMK is an early '97 with the three line oil pump. It has over 4800 miles on the OD and I bought it used from the local ski-doo dealer here. Not knowing a whole lot of its history Ive made sure I keep the oil pump advanced a little over the factory WOT setting and try to keep the mottor fogged to the hilt in the offseason (although I didn't this summer) to keep the bearings fresh.
Like stated above, triple pipe it and ride the **** out of it and have fun!!!