It was never specified if it is a Z or a ZR 440 Sno Pro. The Z would be a fan cooled machine and I have an article on the 2001 Sno Pros in a old Cat's Pride mag and it states that the '01 got a new head, pipe, and ignition changes that bumped HP up to 66 from about 56 in 2000.
The liquid cooled ZR produced significantly more, ranging between 95-97 HP.
I'm almost 100% positive they were rated at 97hp stock (the ZR model). My 2000 is rated at that, and the only difference I know about between the 2000 and 2001's (besides suspension) is the cylinders have a different design for the exhaust port. Hope that helps you.
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