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90-105 depends on compression and clutching track studs ect.
spark plug gap for polaris 425
90-95mph
yes they have three heat exchanges on them
I am not certain but I believe it is around 98 hp.
BR8-ES or a colder plug is BR-9ES
My Porlaris Model # 0950956 is a 1995 Polaris Indy XLT SKS PT. Engine model is EC58PL-03 Displacment is 597cc
A car steering wheel type puller works on most.
Check for: fuel, spark, compression
depends on your area but around $1000-$1600 depending on condition and miles
I actually don't know anything on snowmobiles... But here is a site I found for you regarding snowmobiles. Just copy and paste... www.snowmobileforum.com/polaris-snowmobiles
If you have two adjacent cylinders that don't have compression, then there's a pretty good chance that the head gasket is blown between those two cylinders. A crack in the block or head between those two cylinders is also a possibility but it's much more likely to be caused by the head gasket.