Yesterday I dragged against a switchback 600. I was really surprised to see him in front of me in the first 300 feet. I believe my F7 is ok but I noticed that sometimes, it used to run richer at low RPM. I've been told it's normal for that sled. Of course, at high speed, it was another story but I'm just a little bit disappointed that it doesn't have so much torque at low RPM. Any advices on what I should do. Does installing a performance clutch would help? Once again, everything works fine with the sled, according to Arctic cat mechanic...