I have a 2000 580 Pantera and I to had a rear suspension bolt come out and several other bolts on the suspension were also lose this happened when the sled was new, other than that I have had no problems.
For what it is worth. Several guys up here who have Pantera 580's have had major motor problems. They blew up. They all seem to self distruct at or near 3000 miles. Friend did some research and found this to be a frequent problem. Seems the problem is with the piston rings. They turn and catch the exhaust port. Only person that did not have problems rebuilt his motor before 3000 miles.
Otherwise should be a great machine. good ride and plenty of power.
Have a Pantera 550.... The bolt that primarily backs out is the rear upper carrier bolt. The suspension on these machines is very nice. My buddys father has the 580 and i never noticed a considerable difference between the two.... When riding two up you will get a lot of ski lift especially when getting on the throttle and if the overload springs are not up... Make sure the suspension is adjusted properly otherwise the skis will very light and hard to control.
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