They aren't ski doo's best, but they can certainly get more than 5k. Just go through the pre season prep steps and you won't have anything to worry about. You can get an owner's manual that will tell you everything that needs to be done.
Change the spark plugs
Drain chaincase oil
Check drive chain tension
Refill chain case
Replace fuel and oil filter
Clean air filter
Drain and refill gas tank
Check track condition, tension, and alignment
Check and lubricate suspension
Check pulleys and clean
Inspect drive belt
Check throttle cable for free operation
Check steering, ski leg camber adjustment, and ski runner condition
Check electrical wiring and connections
Inspect condition of starting rope
Check tightness of all bolts, nuts, and links
Inspect seals for possible cuts and leaks
Inspect brake condition, operation and lubricate ratchet wheel
Refill injection oil tank
Adjust oil injection pump
Set engine timing
The manual I have for my mach 1 listed those steps. The recommended that a few of them be preformed by a dealer but really the only one that should be done by a dealer would be the engine timing.
1996 Arctic cat ZR 580- 6 inch risers, C+A powder skis, 99 ZR's front suspension, freshly rebuilt engine
1992 Ski doo mach 1 617cc (the beast)
Die hard polaris anti-fanatic!
Do the snow dance with me!!! We don't get enough in Vermont!
And God said: "Let there be snow."