Got quite a bit of time on the Viper last year and this year has been sparse. Wish I had the snow that jrusher has in the pics above!! This sled requires a few tweaks, but is stone reliable and handles awesome! I prefer to leave the motor stock, so I run about 8 to 10 lbs of boost. Working on some Powercommander stuff right now and suspension as well. Very pleased with this sled so far. If you are coming of ANY other 4 stroke it is going to cause perma grin.