The clutch on my RS 35 is 14 years old. The secret to its longevity is I have a shifter bike and use a tachometer to shift by. The clutch engagement point is around 4000 rpm; max torque is at 5000 rpm, max hp is at 7000 rpm, and max rpm is at 9000. Therefore I'm always in a gear that isn't overloading the clutch. If I drop below 5000 rpm at full throttle, I shift to a lower gear. If I go above 7000 rpm at full throttle, I shift to a higher gear. I also have a level ground take off gear and an up hill take off gear. I also always pedal assist on take-offs and while riding.