the xfire is a great trail sled I would deff buy a xfire 1000 .I have a 7 and love it have ridden a 8 and spent prob 100 mi on a mod 1000xfire.the pipe is a must do for the 1000.I have been seriously contemplating picking up a M1000 153
maybe you could get by with the 153 for trail riding if you added another heat exchanger and load the rails up with idler wheels
ice scratchers wouldnt help for cooling though
sorry kid they don't work with a tinny exchanger and a 2 1/4 track and a hard trail
ice scratchers? u kiddin me ezra?
As long as you hits some fresh snow on the side of the trail along with ice scratchers, a person shouldn't have any issues.
I have ice scratchers on my IQR 144 and have had no issues but I do look for loose snow and duct in a lot - when trail riding it.
The heat exchanger on a M-Series is probably a lot smaller than your sled. I'd say my M8 heat exchanger is 8-10 inches long and the width of the tunnel.
The Crossfire line has bigger heat exchanger.
I don't know about Polaris.