08. Disc time. The amount of discs used is based on personal preference. The kit comes with 20, but for this install we only used 16 discs. According to Jeff Wells from SuperTrapp, 16 to 18 is a good all-around number to use with a stock motor and upgraded pipes and air filter because it provides the best balance of off-idle torque with clean top-end performance, which remains strong throughout the powerband. You want off-idle mid range power because that’s where most riding takes place. Twenty discs might provide a slight gain in the top end, but you could lose power down low on a stock motor. Trey installed the discs and torqued them to SuperTrapp’s specs.