I have a stock 2015 Sportsman 570 Non-EBS with Rip Saw tires. In the mountains at 6,000-9,000 feet climbing steep snow covered hills was sometimes a problem. The machine would loose RPM's and power and would struggle to climb. IT was not back shifting properly. It was dangerous backing down hills because I couldn't make it sometimes. I have snow mobiled all my life so I know CVT clutching pretty well. Here's what I found for the fix.
Primary clutch comes with 25-52G weights which are rated for 0-6,000 feet. The recommended weights for 6,000-12,000 feet are 25-48G. They were $50 and improved the back shifting problem. I kept the original spring in.
Secondary clutch also needed to be setup for better back shifting. I took it apart and 2 ramps were very rough and had worn about halfway through 2 buttons. The rough ramps were causing back shifting problems. I sanded all 3 ramps and finished them with 400 grit sand paper so they were smooth. I replaced all 3 buttons for $15. The spring was set in position 2 and 2, the second stiffest position. I left it in 2 and 2.
When I climbed a long steep hill at 9,000 feet the throttle response was excellent. It held the RPM's and never even struggled and I had power to spare. I am very pleased now with my clutch setup. This past week I never needed full throttle while climbing any hill. I lost a little over 5 MPH top end but safe climbing is more important.
Primary clutch comes with 25-52G weights which are rated for 0-6,000 feet. The recommended weights for 6,000-12,000 feet are 25-48G. They were $50 and improved the back shifting problem. I kept the original spring in.
Secondary clutch also needed to be setup for better back shifting. I took it apart and 2 ramps were very rough and had worn about halfway through 2 buttons. The rough ramps were causing back shifting problems. I sanded all 3 ramps and finished them with 400 grit sand paper so they were smooth. I replaced all 3 buttons for $15. The spring was set in position 2 and 2, the second stiffest position. I left it in 2 and 2.
When I climbed a long steep hill at 9,000 feet the throttle response was excellent. It held the RPM's and never even struggled and I had power to spare. I am very pleased now with my clutch setup. This past week I never needed full throttle while climbing any hill. I lost a little over 5 MPH top end but safe climbing is more important.
