My cousin has a 1997 Zrt 600 with about 6000 miles on it. *The motor has been done several times. *it only has maybe 400 since last rebuild. *It only pulls 6200rpm compression is good 120 across the row. It just happened during bank jumping all the sudden. Secondary is good, primary seems good. *The motor will rev higher to 10000+ with the belt removed. *I cleaned the Carbs synced them set the floats and choke. *And *re drove still will not pull rpm new plugs in it too. *I am suspecting a bad coil what should the ohm readings be on the primary and secondary circuits on the coils. *The one coil that runs one plug has lots of spark, but the one that runs two plugs seems way weaker. any ideas.

When I first seen this message I immediatly thought the pretension on the secondary, but you say it is fine. I wish I could help, sorry. I really only know clutches. I would like to hear what you do or did to remedy this though.

are you getting plenty of fuel, * ie no lines are kinked *or old and brittle, *pin hole ect.?? *fuel filter clean. *just though i would put that out there.

Tryed all that. *Still don't have it solved tommorrow night maybe. http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/confused.gif

Weight aren't sticking? cracked spring? Take the belt off and get the track off the ground and see if you can grab the secondary and see if it turns the track freely. http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/confused.gif

I say broken primary spring..jumping loads the clutches up. But you already know that don't ya Joe? See you in 7 days and counting! Tell Perry to make sure that cat is running when I'm ready to race!

Broken primary spring -- I'll put a beer on it! http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif

Is the brake releasing, maybe it is stuck partially on draging the whole system down.

Dirty pilot jets? *Bad belt? *Too heavy of weights? *I think if it was a bad coil you would have more symptoms than just low top end rpms....