I am very familiar withclutching as I have been racing snowmobiles for many many years. I raced watercross for the last 12 years and clutching was a huge part of performance. As for trail riding I would add more wait till the motor could not pull the RPMs thus increasing the efficiency fuel economy and all around performance as for the secondary that was used for back shift for a full shift out not sure where these clutches one of these days I will find out