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[red][/red]Just bought my '91 Ski-doo Formula Mach 1 and I was wondering what the top end is on it? (It is all stock)

If any of you Machsters out there know... drop me a line and any other info on it .

Thanks in advance[8D]
 

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I road with a friend who had a '91? or '92?. I know it went near if not over 100.
 

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whats it got for a motor what size it should do 100 if u got the nuts to ride it that fast lol
 

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Let me help...I've got a 1992 Mach 1...you have a 617 Rotax, dubbed a "Type 643", which is a faster engine than either the 583 or 670. I was clocked by radar several years ago at 5 degrees and hard-packed snow at 123.3 mph in fully stock form. You have found a rocket when tuned right. I have yet to find a better all around sled (with exception to powder...it sux for that). Have fun!!
 
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