Extreme Cold=Lean?


You should run premium fuel,which I always do on my sleds,94 octane.I have a water eliminater device in the tanks.Make sure your gas line antifreeze and water remover contains Isopropyl Alcohol.I use a little of that in the tanks also to be safe. It is a cheap alternative to replacing pistons.And make sure you are jetted properly for your conditions.It has been in the -40 C range here the last 2 weeks,so I haven't been riding for 2 weeks already. I will ride in -20 to -30 C and that is it.No fun when it is to cold to ride.My sled is jetted perfectly for them temps.When I was younger,used to ride with my cousin in -30 F and 3:00 am in the morning yet.Not for me now to do.Always thinking that something could break down and I wouldn't be able to get home safe.
 
with my tripple pipes, head mod, porting i still run our pump gas that is only around 87 octane, a stock viper shouldnt have any trouble on regular.
 
According to the owners manual a stock Viper needs 88 octane fuel. Wouldn't the fuel additives (isopropyl) and extra oil effectively lean the motor out? The manual also specifies that you should not use alcohol deicers or water absorbing additives with oxygenated fuels. The manual also goes on to state that with oxygenated fuels you should jet up one size. Isn't a good share of Canada fuel oxygenated already?
 
I have always used isopropyl and 91 ( needed for srx ) but would be good measure for all sleds.Good piece of mind.
 
I try to avoid "long" wide open runs in the cold. I never burned mine down and don't want to. Could've been ice in the carb at that temp.
 
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