A heavy tire with big lugs in the tread will most likely need clutching work. The cvtech secondary you have is like the one most of us have, but the primary is a trailbloc while most of us are running the cfmoto one. the secondary tuning info can be found here. Info on the cvtech trailbloc primary is lacking here, but canam owners have been using these for awhile now and info is out there to be found. You might only need to reclock you secondary spring for more backshift (no cost,just time) and not have to mess with the primary at all. You will have to try it out. If you have clutching questions, maybe start another post on it to get more looks and responses.