Powder specials suffer from being a mountain sled when it comes to trails. I know the 600 powder specials had efi, but I also believe that the 700's where carbed. It's hard to find the compromise between trail rideability and off trail goodness. I have almost come to the conclusion that you almost need two sleds. However if you are just riding the trails from spot to spot for off trail I'm sure you wouldn't mind the trail manners. But if you are considering it for 50% or so trail rider it would not be all that good. A 136 with a 1 1/2 lug would be a sled that could ride trails but then nor be at a huge disadvantage off trail.
Exactly what ZR600 said. having weight transfer (ski lift) really does help put the power to the ground. But if you have too much weight transfer, your motor is wasting power by lifting the front of the sled up instead of moving the sled forward. This is why on drag sleds, the skis will only come up a little
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