The Yamaha SR Viper sleds are known for lacking top end, only topping out in the 80’s.  With the BIG VENOM kit you will be able to run over 100 mph (we hit 105 mph on GPS on snow and 111 mph on asphalt this kit).  The BIG VENOM Kit also gives you much faster acceleration, from the low end through the middle and on top.  Comes with everything you need—Heavy Hitter adjustable flyweights, secondary spring, glide washers, clutch holder, all for only $295.