I've been reading alot around here on the 700-800 twins and notice that they are not getting good gas mileage compared to what I have found on a snowmobile site, can someone explain why they wouldn't do this type of set up on the ATV's to increase there gas mileage to respectable levels. With gas prices stupid like they are you want more bang for your buck, and if you go into very remote far areas who wants to be carrying 5 gallons of gas plus. My traxter gets 125 miles on 5 gallons, I usually only bring roughly 2 gallons just incase.
Can anyone explain this, maybe someone should ask Polaris directly.


The 600, 700 and 800 feature the liquid-cooled Polaris Liberty engine:
Variable Exhaust System (VES) improves fuel economy, while reducing noise and emissions
Mikuni flatslide carbs with Throttle Position Sensors (TPS) enhance throttle response and reduce thumb effort
Compression release reduces starting effort by 35% (700 and 800)
New Polaris Detonation Elimination Technology helps protect the engine (700 and 800)
The Frontier Classic is powered by the Polaris Liberty four-cycle engine, a snowmobile-specific design that reduces hydrocarbons by 98% and carbon monoxide by 64%, while delivering up to 20-25 mpg at trail speeds. It’s so clean it meets proposed 2012 EPA emissions standards.Text

 

Hello Stumppuller1. The 600,700 and 900 sled engines are two stroke, so VES only make sense on these engines. Deto elimination and TPS are required to keep these engines from melting down because they are pushing such high horse power from 120 to 150hp. Also, these sleds will get any where from 8-15 miles per gallon depending on how heavy you are on the throttle. The Frontier is a relatively tame 4-stroke that most sledders are not interested in because it is very heavy and low powered. Although it is interesting at a 4 stroke sled gets better fuel mileage than a quad. The only thing I can think of, is that sled trails tend to be much less rugged and faster. Average speeds of 50 mph are not uncommon on many sled trails. On the other hand, 50mph is quite unusual on quad trails. The top speed of the 600 Polaris Fusion sled is probably between 110-120 mph. The top speed of a 500 Sportsman is probably half that. The frontier probably does 85mph (just guessing). So its speed of best fuel mileage is probably much faster than the quad.
Bryce

 

The technology will trikle down in the next few years I'm sure. Even though they both wear a Polaris badge, the ATV & Snow divisions are like seperate companies. It's not the same engineer building a Frontier that's building a Sportsman.

 

I would say that the big motors are getting pretty good gas mileage. I can get 80-100 miles on a tank of fuel on my '05 700 EFI if I'm just cruising, thats pretty good for a 4.1 gallon gas tank...